955 added

Author: aQuaYi

Algorithms/0955.delete-columns-to-make-sorted-ii/README.md

@@ -0,0 +1,47 @@
+# [955. Delete Columns to Make Sorted II](https://leetcode.com/problems/delete-columns-to-make-sorted-ii/)
+
+We are given an array A of N lowercase letter strings, all of the same length.
+
+Now, we may choose any set of deletion indices, and for each string, we delete all the characters in those indices.
+
+For example, if we have an array A = ["abcdef","uvwxyz"] and deletion indices {0, 2, 3}, then the final array after deletions is ["bef","vyz"].
+
+Suppose we chose a set of deletion indices D such that after deletions, the final array has its elements in lexicographic order (A[0] <= A[1] <= A[2] ... <= A[A.length - 1]).
+
+Return the minimum possible value of D.length.
+
+Example 1:
+
+```text
+Input: ["ca","bb","ac"]
+Output: 1
+Explanation:
+After deleting the first column, A = ["a", "b", "c"].
+Now A is in lexicographic order (ie. A[0] <= A[1] <= A[2]).
+We require at least 1 deletion since initially A was not in lexicographic order, so the answer is 1.
+```
+
+Example 2:
+
+```text
+Input: ["xc","yb","za"]
+Output: 0
+Explanation:
+A is already in lexicographic order, so we don't need to delete anything.
+Note that the rows of A are not necessarily in lexicographic order:
+ie. it is NOT necessarily true that (A[0][0] <= A[0][1] <= ...)
+```
+
+Example 3:
+
+```text
+Input: ["zyx","wvu","tsr"]
+Output: 3
+Explanation:
+We have to delete every column.
+```
+
+Note:
+
+1. 1 <= A.length <= 100
+1. 1 <= A[i].length <= 100

Algorithms/0955.delete-columns-to-make-sorted-ii/delete-columns-to-make-sorted-ii.go

@@ -0,0 +1,6 @@
+package problem0955
+
+func minDeletionSize(A []string) int {
+
+	return 0
+}

Algorithms/0955.delete-columns-to-make-sorted-ii/delete-columns-to-make-sorted-ii_test.go

@@ -0,0 +1,47 @@
+package problem0955
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// tcs is testcase slice
+var tcs = []struct {
+	A   []string
+	ans int
+}{
+
+	{
+		[]string{"ca", "bb", "ac"},
+		1,
+	},
+
+	{
+		[]string{"xc", "yb", "za"},
+		0,
+	},
+
+	{
+		[]string{"zyx", "wvu", "tsr"},
+		3,
+	},
+
+	// 可以有多个 testcase
+}
+
+func Test_minDeletionSize(t *testing.T) {
+	ast := assert.New(t)
+
+	for _, tc := range tcs {
+		ast.Equal(tc.ans, minDeletionSize(tc.A), "输入:%v", tc)
+	}
+}
+
+func Benchmark_minDeletionSize(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		for _, tc := range tcs {
+			minDeletionSize(tc.A)
+		}
+	}
+}

leetcode.json

@@ -1,7 +1,7 @@
 {
 	"Username": "aQuaYi",
 	"Ranking": 908,
-	"Updated": "2019-03-16T19:43:35.734854191+08:00",
+	"Updated": "2019-03-17T11:32:06.931447145+08:00",
 	"Record": {
 		"Easy": {
 			"Solved": 213,
@@ -1081,7 +1081,7 @@
 			"ID": 88,
 			"Title": "Merge Sorted Array",
 			"TitleSlug": "merge-sorted-array",
-			"PassRate": "34%",
+			"PassRate": "35%",
 			"Difficulty": "Easy",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -2629,7 +2629,7 @@
 			"ID": 217,
 			"Title": "Contains Duplicate",
 			"TitleSlug": "contains-duplicate",
-			"PassRate": "50%",
+			"PassRate": "51%",
 			"Difficulty": "Easy",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -4717,7 +4717,7 @@
 			"ID": 391,
 			"Title": "Perfect Rectangle",
 			"TitleSlug": "perfect-rectangle",
-			"PassRate": "28%",
+			"PassRate": "27%",
 			"Difficulty": "Hard",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -6181,7 +6181,7 @@
 			"ID": 513,
 			"Title": "Find Bottom Left Tree Value",
 			"TitleSlug": "find-bottom-left-tree-value",
-			"PassRate": "57%",
+			"PassRate": "58%",
 			"Difficulty": "Medium",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -7657,7 +7657,7 @@
 			"ID": 636,
 			"Title": "Exclusive Time of Functions",
 			"TitleSlug": "exclusive-time-of-functions",
-			"PassRate": "47%",
+			"PassRate": "48%",
 			"Difficulty": "Medium",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -7753,7 +7753,7 @@
 			"ID": 644,
 			"Title": "Maximum Average Subarray II",
 			"TitleSlug": "maximum-average-subarray-ii",
-			"PassRate": "27%",
+			"PassRate": "28%",
 			"Difficulty": "Hard",
 			"IsAccepted": false,
 			"IsPaid": true,
@@ -7861,7 +7861,7 @@
 			"ID": 653,
 			"Title": "Two Sum IV - Input is a BST",
 			"TitleSlug": "two-sum-iv-input-is-a-bst",
-			"PassRate": "51%",
+			"PassRate": "52%",
 			"Difficulty": "Easy",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -9205,7 +9205,7 @@
 			"ID": 765,
 			"Title": "Couples Holding Hands",
 			"TitleSlug": "couples-holding-hands",
-			"PassRate": "51%",
+			"PassRate": "50%",
 			"Difficulty": "Hard",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -9253,7 +9253,7 @@
 			"ID": 769,
 			"Title": "Max Chunks To Make Sorted",
 			"TitleSlug": "max-chunks-to-make-sorted",
-			"PassRate": "50%",
+			"PassRate": "51%",
 			"Difficulty": "Medium",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -9601,7 +9601,7 @@
 			"ID": 798,
 			"Title": "Smallest Rotation with Highest Score",
 			"TitleSlug": "smallest-rotation-with-highest-score",
-			"PassRate": "38%",
+			"PassRate": "39%",
 			"Difficulty": "Hard",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -9889,7 +9889,7 @@
 			"ID": 822,
 			"Title": "Card Flipping Game",
 			"TitleSlug": "card-flipping-game",
-			"PassRate": "39%",
+			"PassRate": "40%",
 			"Difficulty": "Medium",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -10021,7 +10021,7 @@
 			"ID": 833,
 			"Title": "Find And Replace in String",
 			"TitleSlug": "find-and-replace-in-string",
-			"PassRate": "44%",
+			"PassRate": "45%",
 			"Difficulty": "Medium",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -10765,7 +10765,7 @@
 			"ID": 895,
 			"Title": "Maximum Frequency Stack",
 			"TitleSlug": "maximum-frequency-stack",
-			"PassRate": "53%",
+			"PassRate": "52%",
 			"Difficulty": "Hard",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -10861,7 +10861,7 @@
 			"ID": 903,
 			"Title": "Valid Permutations for DI Sequence",
 			"TitleSlug": "valid-permutations-for-di-sequence",
-			"PassRate": "41%",
+			"PassRate": "42%",
 			"Difficulty": "Hard",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -10957,7 +10957,7 @@
 			"ID": 911,
 			"Title": "Online Election",
 			"TitleSlug": "online-election",
-			"PassRate": "44%",
+			"PassRate": "45%",
 			"Difficulty": "Medium",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -11029,7 +11029,7 @@
 			"ID": 917,
 			"Title": "Reverse Only Letters",
 			"TitleSlug": "reverse-only-letters",
-			"PassRate": "55%",
+			"PassRate": "56%",
 			"Difficulty": "Easy",
 			"IsAccepted": true,
 			"IsPaid": false,
@@ -11737,7 +11737,7 @@
 			"ID": 976,
 			"Title": "Largest Perimeter Triangle",
 			"TitleSlug": "largest-perimeter-triangle",
-			"PassRate": "56%",
+			"PassRate": "57%",
 			"Difficulty": "Easy",
 			"IsAccepted": false,
 			"IsPaid": false,
@@ -12097,7 +12097,7 @@
 			"ID": 1006,
 			"Title": "Clumsy Factorial",
 			"TitleSlug": "clumsy-factorial",
-			"PassRate": "55%",
+			"PassRate": "54%",
 			"Difficulty": "Medium",
 			"IsAccepted": false,
 			"IsPaid": false,
@@ -12109,7 +12109,7 @@
 			"ID": 1007,
 			"Title": "Minimum Domino Rotations For Equal Row",
 			"TitleSlug": "minimum-domino-rotations-for-equal-row",
-			"PassRate": "48%",
+			"PassRate": "47%",
 			"Difficulty": "Medium",
 			"IsAccepted": false,
 			"IsPaid": false,