diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cd51349..f12c127 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
         # Breaking changes like this might be mixed into the future stable versions.
         # https://github.com/rust-lang/rustfmt/pull/3632
         channel:
-          - 1.40.0
+          - 1.41.0
           - stable
 
     name: Rustfmt (${{ matrix.channel }})
@@ -49,10 +49,10 @@ jobs:
       matrix:
         toolchain:
           # `x86_64-pc-windows-gnu` is tier 1 **for now**.
-          - 1.40.0-x86_64-pc-windows-msvc
-          - 1.40.0-x86_64-pc-windows-gnu
-          - 1.40.0-x86_64-apple-darwin
-          - 1.40.0-x86_64-unknown-linux-gnu
+          - 1.41.0-x86_64-pc-windows-msvc
+          - 1.41.0-x86_64-pc-windows-gnu
+          - 1.41.0-x86_64-apple-darwin
+          - 1.41.0-x86_64-unknown-linux-gnu
           - stable-x86_64-pc-windows-msvc
           - stable-x86_64-pc-windows-gnu
           - stable-x86_64-apple-darwin
@@ -62,13 +62,13 @@ jobs:
           - beta-x86_64-apple-darwin
           - beta-x86_64-unknown-linux-gnu
         include:
-          - toolchain: 1.40.0-x86_64-pc-windows-msvc
+          - toolchain: 1.41.0-x86_64-pc-windows-msvc
             os: windows-latest
-          - toolchain: 1.40.0-x86_64-pc-windows-gnu
+          - toolchain: 1.41.0-x86_64-pc-windows-gnu
             os: windows-latest
-          - toolchain: 1.40.0-x86_64-apple-darwin
+          - toolchain: 1.41.0-x86_64-apple-darwin
             os: macOS-latest
-          - toolchain: 1.40.0-x86_64-unknown-linux-gnu
+          - toolchain: 1.41.0-x86_64-unknown-linux-gnu
             os: ubuntu-18.04
           - toolchain: stable-x86_64-pc-windows-msvc
             os: windows-latest
diff --git a/Cargo.lock b/Cargo.lock
index 655903f..e1c4b39 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,648 +2,652 @@
 # It is not intended for manual editing.
 [[package]]
 name = "aho-corasick"
-version = "0.7.6"
+version = "0.7.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f56c476256dc249def911d6f7580b5fc7e875895b5d7ee88f5d602208035744"
 dependencies = [
- "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr",
 ]
 
 [[package]]
 name = "alga"
 version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "658f9468113d34781f6ca9d014d174c74b73de870f1e0e3ad32079bbab253b19"
 dependencies = [
- "approx 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libm 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-complex 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "approx",
+ "libm 0.1.4",
+ "num-complex",
+ "num-traits",
 ]
 
 [[package]]
 name = "approx"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0e60b75072ecd4168020818c0107f2857bb6c4e64252d8d3983f6263b40a5c3"
 dependencies = [
- "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits",
 ]
 
 [[package]]
 name = "ascii"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbf56136a5198c7b01a49e3afcbef6cf84597273d298f54432926024107b0109"
 
 [[package]]
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- "bitset-fixed 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "im-rc 14.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "indexmap 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools-num 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libm 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "maplit 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "nalgebra 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ndarray 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "num 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-bigint 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-complex 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
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- "whiteread 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "alga",
+ "ascii",
+ "bitset-fixed",
+ "either",
+ "fixedbitset",
+ "getrandom",
+ "im-rc",
+ "indexmap",
+ "itertools",
+ "itertools-num",
+ "lazy_static",
+ "libm 0.2.1",
+ "maplit",
+ "nalgebra",
+ "ndarray",
+ "num",
+ "num-bigint",
+ "num-complex",
+ "num-derive",
+ "num-integer",
+ "num-iter",
+ "num-rational",
+ "num-traits",
+ "ordered-float",
+ "permutohedron",
+ "petgraph",
+ "proconio",
+ "rand",
+ "rand_chacha",
+ "rand_core",
+ "rand_distr",
+ "rand_hc",
+ "rand_pcg",
+ "regex",
+ "rustc-hash",
+ "smallvec",
+ "superslice",
+ "text_io",
+ "whiteread",
 ]
 
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+name = "autocfg"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
+
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+checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
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 dependencies = [
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 dependencies = [
- "ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
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+checksum = "37ab347416e802de484e4d03c7316c48f1ecb56574dfd4a46a80f173ce1de04d"
 
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+checksum = "0ed1e761351b56f54eb9dcd0cfaca9fd0daecf93918e1cfc01c8a3d26ee7adcd"
 dependencies = [
- "typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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- "wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "libc",
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-version = "14.2.0"
+version = "14.1.0"
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+ "bitmaps",
+ "rand_core",
+ "rand_xoshiro",
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 dependencies = [
- "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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 dependencies = [
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 dependencies = [
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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 dependencies = [
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- "rand_distr 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "alga",
+ "approx",
+ "generic-array",
+ "matrixmultiply",
+ "num-complex",
+ "num-rational",
+ "num-traits",
+ "rand",
+ "rand_distr",
+ "typenum",
 ]
 
 [[package]]
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 version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25b001fc2f5df269365fb77bd8396ce6b1f61c9848f7f088c25e57494bacc57b"
 dependencies = [
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- "rawpointer 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itertools",
+ "matrixmultiply",
+ "num-complex",
+ "num-integer",
+ "num-traits",
+ "rawpointer",
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 [[package]]
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 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8536030f9fea7127f841b45bb6243b27255787fb4eb83958aa1ef9d2fdc0c36"
 dependencies = [
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- "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "num-complex",
+ "num-integer",
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-"checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
-"checksum c2-chacha 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "214238caa1bf3a496ec3392968969cab8549f96ff30652c9e56885329315f6bb"
-"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-"checksum either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
-"checksum fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37ab347416e802de484e4d03c7316c48f1ecb56574dfd4a46a80f173ce1de04d"
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-"checksum getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
-"checksum im-rc 14.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5df50c85553397f6320fad21751d7ba9007de512c7971cb8746238f1a155d3c9"
-"checksum indexmap 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b54058f0a6ff80b6803da8faf8997cde53872b38f4023728f6830b06cd3c0dc"
-"checksum itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f56a2d0bc861f9165be4eb3442afd3c236d8a98afd426f65d92324ae1091a484"
-"checksum itertools-num 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a872a22f9e6f7521ca557660adb96dd830e54f0f490fa115bb55dd69d38b27e7"
-"checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-"checksum libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)" = "d515b1f41455adea1313a4a2ac8a8a477634fbae63cc6100e3aebb207ce61558"
-"checksum libm 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7fc7aa29613bd6a620df431842069224d8bc9011086b1db4c0e0cd47fa03ec9a"
-"checksum libm 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c7d73b3f436185384286bd8098d17ec07c9a7d2388a6599f824d8502b529702a"
-"checksum maplit 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
-"checksum matrixmultiply 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d4f7ec66360130972f34830bfad9ef05c6610a43938a467bcc9ab9369ab3478f"
-"checksum memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3197e20c7edb283f87c071ddfc7a2cca8f8e0b888c242959846a6fce03c72223"
-"checksum nalgebra 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0abb021006c01b126a936a8dd1351e0720d83995f4fc942d0d426c654f990745"
-"checksum ndarray 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "25b001fc2f5df269365fb77bd8396ce6b1f61c9848f7f088c25e57494bacc57b"
-"checksum num 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b8536030f9fea7127f841b45bb6243b27255787fb4eb83958aa1ef9d2fdc0c36"
-"checksum num-bigint 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "090c7f9998ee0ff65aa5b723e4009f7b217707f1fb5ea551329cc4d6231fb304"
-"checksum num-complex 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b6b19411a9719e753aff12e5187b74d60d3dc449ec3f4dc21e3989c3f554bc95"
-"checksum num-derive 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0c8b15b261814f992e33760b1fca9fe8b693d8a65299f20c9901688636cfb746"
-"checksum num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "3f6ea62e9d81a77cd3ee9a2a5b9b609447857f3d358704331e4ef39eb247fcba"
-"checksum num-iter 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "dfb0800a0291891dd9f4fe7bd9c19384f98f7fbe0cd0f39a2c6b88b9868bbc00"
-"checksum num-rational 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "da4dc79f9e6c81bef96148c8f6b8e72ad4541caa4a24373e900a36da07de03a3"
-"checksum num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "c62be47e61d1842b9170f0fdeec8eba98e60e90e5446449a0545e5152acd7096"
-"checksum ordered-float 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "18869315e81473c951eb56ad5558bbc56978562d3ecfb87abb7a1e944cea4518"
-"checksum permutohedron 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b687ff7b5da449d39e418ad391e5e08da53ec334903ddbb921db208908fc372c"
-"checksum petgraph 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "29c127eea4a29ec6c85d153c59dc1213f33ec74cead30fe4730aecc88cc1fd92"
-"checksum ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
-"checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
-"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
-"checksum proconio 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "3f50331d8ee5ca54b123896161f31d1dc670be1400569e1efed5186fe3ee7258"
-"checksum proconio-derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "cbe4b8993fb10674fbc95383266dbb57608642c389134495e5f485a54d19fe3f"
-"checksum quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
-"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
-"checksum rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
-"checksum rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "03a2a90da8c7523f554344f921aa97283eadf6ac484a6d2a7d0212fa7f8d6853"
-"checksum rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
-"checksum rand_distr 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "96977acbdd3a6576fb1d27391900035bf3863d4a16422973a409b488cf29ffb2"
-"checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
-"checksum rand_pcg 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "16abd0c1b639e9eb4d7c50c0b8100b0d0f849be2349829c740fe8e6eb4816429"
-"checksum rand_xoshiro 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a9fcdd2e881d02f1d9390ae47ad8e5696a9e4be7b547a1da2afbc61973217004"
-"checksum rawpointer 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "60a357793950651c4ed0f3f52338f53b2f809f32d83a07f72909fa13e4c6c1e3"
-"checksum regex 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "b5508c1941e4e7cb19965abef075d35a9a8b5cdf0846f30b4050e9b55dc55e87"
-"checksum regex-syntax 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "e734e891f5b408a29efbf8309e656876276f49ab6a6ac208600b4419bd893d90"
-"checksum rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7540fc8b0c49f096ee9c961cda096467dce8084bec6bdca2fc83895fd9b28cb8"
-"checksum sized-chunks 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6f59f81ec9833a580d2448e958d16bd872637798f3ab300b693c48f136fb76ff"
-"checksum smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "44e59e0c9fa00817912ae6e4e6e3c4fe04455e75699d06eedc7d85917ed8e8f4"
-"checksum superslice 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ab16ced94dbd8a46c82fd81e3ed9a8727dac2977ea869d217bcc4ea1f122e81f"
-"checksum syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)" = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
-"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
-"checksum text_io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "6cb170b4f47dc48835fbc56259c12d8963e542b05a24be2e3a1f5a6c320fd2d4"
-"checksum thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
-"checksum typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
-"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
-"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
-"checksum version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
-"checksum wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)" = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
-"checksum whiteread 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8bc25de0a968755322a6b517a7257df7ec3216ed7907b8fc064906542f9714b3"
+checksum = "8bc25de0a968755322a6b517a7257df7ec3216ed7907b8fc064906542f9714b3"
diff --git a/Cargo.toml b/Cargo.toml
index 8e1a38f..810285d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ path = "src/main.rs"
 
 # 多バイト長整数、分数、複素数など
 num = "=0.2.1"
-num-bigint = "=0.2.6"
+num-bigint = "=0.2.5"
 num-complex = "=0.2.4"
 num-integer = "=0.1.42"
 num-iter = "=0.1.40"
@@ -54,7 +54,7 @@ rand_distr = "=0.2.2"
 petgraph = "=0.5.0"
 
 # 挿入順を保持するhash table
-indexmap = "=1.3.1"
+indexmap = "=1.3.0"
 
 # 正規表現
 regex = "=1.3.3"
@@ -88,15 +88,15 @@ either = "=1.5.3"
 # 標準ライブラリのVecやHashMapに対応する永続データ構造
 # 永続データ構造は関数型言語によく見られるデータ構造で、要素を更新しても、そのデータ構造の
 # 以前のバージョンにアクセスできる。（更新の度に差分が記録されていくイメージ）
-im-rc = "=14.2.0"
+im-rc = "=14.1.0"
 
 # 可変長bit set。
 fixedbitset = "=0.2.0"
 bitset-fixed = "=0.1.0"
 
 # 競技プログラミングの入出力サポート
-proconio = { version = "=0.3.5", features = ["derive"] }
-text_io = "=0.1.8"
+proconio = { version = "=0.3.4", features = ["derive"] }
+text_io = "=0.1.7"
 whiteread = "=0.5.0"
 
 # 高速なハッシュ関数
diff --git a/README.md b/README.md
index d026fbf..a7badbe 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@
 **TODO** もう少し詳しく書く
 
 - AtCoder 2019年言語アップデート後の環境向け
-- Rust 1.40.0
+- Rust 1.41.0
 - AtCoderジャッジサーバ環境の構築用
 
 
diff --git a/examples/abc057-b-text-io.rs b/examples/abc057-b-text-io.rs
index e46bfe2..2f22337 100644
--- a/examples/abc057-b-text-io.rs
+++ b/examples/abc057-b-text-io.rs
@@ -1,6 +1,8 @@
 // https://atcoder.jp/contests/abc057/tasks/abc057_b
 
-use text_io::read;
+#![allow(clippy::many_single_char_names, clippy::try_err)]
+
+use text_io::{read, try_read, try_scan};
 
 fn main() {
     let n: usize = read!();
diff --git a/examples/abc073-d.rs b/examples/abc073-d.rs
index 02d94aa..6a7cd53 100644
--- a/examples/abc073-d.rs
+++ b/examples/abc073-d.rs
@@ -13,7 +13,7 @@ use std::ops::Sub;
 
 fn main() {
     input! {
-        _: usize,
+        _n: usize, // `proconio` does not accept `_` as a variable name until v0.3.5.
         m: usize,
         r: usize,
         rs: [NodeIndex1<u32>; r],
diff --git a/examples/abc118-b-proconio.rs b/examples/abc118-b-proconio.rs
index c00d359..a50e96b 100644
--- a/examples/abc118-b-proconio.rs
+++ b/examples/abc118-b-proconio.rs
@@ -8,7 +8,7 @@ use std::ops::{BitAnd, BitOr};
 fn main() {
     input! {
         n: usize,
-        _: usize,
+        _m: usize, // `proconio` does not accept `_` as a variable name until v0.3.5.
         a: [[Usize1]; n],
     }
 
diff --git a/examples/abc118-b-text-io.rs b/examples/abc118-b-text-io.rs
index 66c5958..2cef31d 100644
--- a/examples/abc118-b-text-io.rs
+++ b/examples/abc118-b-text-io.rs
@@ -1,9 +1,10 @@
 // https://atcoder.jp/contests/abc118/tasks/abc118_b
 
-use text_io::read;
+use text_io::{read, try_read, try_scan};
 
 use std::ops::{BitAnd, BitOr};
 
+#[allow(clippy::try_err)]
 fn main() {
     let (n, _): (usize, usize) = (read!(), read!());
     let a = (0..n)
diff --git a/examples/abc121-b-text-io.rs b/examples/abc121-b-text-io.rs
index 81effa6..3c7ab2d 100644
--- a/examples/abc121-b-text-io.rs
+++ b/examples/abc121-b-text-io.rs
@@ -1,8 +1,8 @@
 // https://atcoder.jp/contests/abc121/tasks/abc121_b
 
-use text_io::read;
+use text_io::{read, try_read, try_scan};
 
-#[allow(clippy::many_single_char_names)]
+#[allow(clippy::many_single_char_names, clippy::try_err)]
 fn main() {
     let (n, m, c): (usize, usize, i32) = (read!(), read!(), read!());
     let b = (0..m).map(|_| read!()).collect::<Vec<i32>>();
diff --git a/examples/abc129-f.rs b/examples/abc129-f.rs
index 15fead2..d6d8043 100644
--- a/examples/abc129-f.rs
+++ b/examples/abc129-f.rs
@@ -16,7 +16,7 @@ fn main() {
         l: u64,
         a: u64,
         b: u64,
-        (): Mod,
+        _m: Mod, // `proconio` does not accept `_` as a variable name until v0.3.5.
     }
 
     let count = |d| -> _ {
diff --git a/examples/practice-a-text-io.rs b/examples/practice-a-text-io.rs
index e7ec952..cc39bde 100644
--- a/examples/practice-a-text-io.rs
+++ b/examples/practice-a-text-io.rs
@@ -1,7 +1,8 @@
 // https://atcoder.jp/contests/practice/tasks/practice_1
 
-use text_io::read;
+use text_io::{read, try_read, try_scan};
 
+#[allow(clippy::many_single_char_names, clippy::try_err)]
 fn main() {
     let (a, b, c, s): (u32, u32, u32, String) = (read!(), read!(), read!(), read!());
 
diff --git a/examples/practice-b-text-io.rs b/examples/practice-b-text-io.rs
index d3b2514..df3960e 100644
--- a/examples/practice-b-text-io.rs
+++ b/examples/practice-b-text-io.rs
@@ -1,10 +1,11 @@
 // https://atcoder.jp/contests/practice/tasks/practice_2
 
 use maplit::hashset;
-use text_io::read;
+use text_io::{read, try_read, try_scan};
 
 use std::{io, str};
 
+#[allow(clippy::try_err)]
 fn main() {
     fn read_line() -> String {
         let mut input = "".to_owned();
diff --git a/rust-toolchain b/rust-toolchain
index 32b7211..7d47e59 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-1.40.0
+1.41.0