Add a test for ABC121-B

Author: qryxip

examples/abc121-b.rs

@@ -0,0 +1,19 @@
+// https://atcoder.jp/contests/abc121/tasks/abc121_b
+
+use proconio::input;
+
+fn main() {
+    input! {
+        n: usize,
+        m: usize,
+        c: i32,
+        b: [i32; m],
+        a: [[i32; m]; n],
+    }
+
+    let ans = a
+        .into_iter()
+        .filter(|a| a.iter().zip(&b).map(|(a, b)| a * b).sum::<i32>() + c > 0)
+        .count();
+    println!("{}", ans);
+}

examples/tests.ron

@@ -55,6 +55,10 @@
             name: "ABC120: D - Decayed Bridges",
             matching: Words,
         ),
+        "abc121-b": (
+            name: "ABC121: B - Can you solve this?",
+            matching: Words,
+        ),
         "abc129-f": (
             name: "ABC129: F - Takahashi's Basics in Education and Learning",
             matching: Words,

examples/testsets/abc121-b/in/sample_01.txt

@@ -0,0 +1,4 @@
+2 3 -10
+1 2 3
+3 2 1
+1 2 2

examples/testsets/abc121-b/in/sample_02.txt

@@ -0,0 +1,7 @@
+5 2 -4
+-2 5
+100 41
+100 40
+-3 0
+-6 -2
+18 -13

examples/testsets/abc121-b/in/sample_03.txt

@@ -0,0 +1,5 @@
+3 3 0
+100 -100 0
+0 100 100
+100 100 100
+-100 100 100

examples/testsets/abc121-b/out/sample_01.txt

@@ -0,0 +1 @@
+1

examples/testsets/abc121-b/out/sample_02.txt

@@ -0,0 +1 @@
+2

examples/testsets/abc121-b/out/sample_03.txt

@@ -0,0 +1 @@
+0