Add solution and test-cases for problem 3234

Author: 0xff-dev

leetcode/3201-3300/3234.Count-the-Number-of-Substrings-With-Dominant-Ones/README.md

@@ -1,28 +1,51 @@
 # [3234.Count the Number of Substrings With Dominant Ones][title]
 
-> [!WARNING|style:flat]
-> This question is temporarily unanswered if you have good ideas. Welcome to [Create Pull Request PR](https://github.com/kylesliu/awesome-golang-algorithm)
-
 ## Description
+You are given a binary string `s`.
+
+Return the number of substrings with **dominant** ones.
+
+A string has **dominant** ones if the number of ones in the string is **greater than or equal to** the **square** of the number of zeros in the string.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
-```
+Input: s = "00011"
 
-## 题意
-> ...
+Output: 5
 
-## 题解
+Explanation:
 
-### 思路1
-> ...
-Count the Number of Substrings With Dominant Ones
-```go
+The substrings with dominant ones are shown in the table below.
+
+i	j	s[i..j]	Number of Zeros	Number of Ones
+3	3	1	0	1
+4	4	1	0	1
+2	3	01	1	1
+3	4	11	0	2
+2	4	011	1	2
 ```
 
+**Example 2:**
+
+```
+Input: s = "101101"
+
+Output: 16
+
+Explanation:
+
+The substrings with non-dominant ones are shown in the table below.
+
+Since there are 21 substrings total and 5 of them have non-dominant ones, it follows that there are 16 substrings with dominant ones.
+
+i	j	s[i..j]	Number of Zeros	Number of Ones
+1	1	0	1	0
+4	4	0	1	0
+1	4	0110	2	2
+0	4	10110	2	3
+1	5	01101	2	3
+```
 
 ## 结语
 

leetcode/3201-3300/3234.Count-the-Number-of-Substrings-With-Dominant-Ones/Solution.go

@@ -1,5 +1,35 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(s string) int {
+	n := len(s)
+	pre := make([]int, n+1)
+	pre[0] = -1
+	for i := 0; i < n; i++ {
+		if i == 0 || (i > 0 && s[i-1] == '0') {
+			pre[i+1] = i
+		} else {
+			pre[i+1] = pre[i]
+		}
+	}
+	res := 0
+	for i := 1; i <= n; i++ {
+		cnt0 := 0
+		if s[i-1] == '0' {
+			cnt0 = 1
+		}
+		j := i
+		for j > 0 && cnt0*cnt0 <= n {
+			cnt1 := (i - pre[j]) - cnt0
+			if cnt0*cnt0 <= cnt1 {
+				add := j - pre[j]
+				if cnt1-cnt0*cnt0+1 < add {
+					add = cnt1 - cnt0*cnt0 + 1
+				}
+				res += add
+			}
+			j = pre[j]
+			cnt0++
+		}
+	}
+	return res
 }

leetcode/3201-3300/3234.Count-the-Number-of-Substrings-With-Dominant-Ones/Solution_test.go

@@ -10,12 +10,11 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs string
+		expect int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", "00011", 5},
+		{"TestCase2", "101101", 16},
 	}
 
 	//	开始测试
@@ -30,10 +29,10 @@ func TestSolution(t *testing.T) {
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }