规范格式

leetcode/0438.Find-All-Anagrams-in-a-String/438. Find All Anagrams in a String.go

@@ -0,0 +1,33 @@
+package leetcode
+
+func findAnagrams(s string, p string) []int {
+	var freq [256]int
+	result := []int{}
+	if len(s) == 0 || len(s) < len(p) {
+		return result
+	}
+	for i := 0; i < len(p); i++ {
+		freq[p[i]-'a']++
+	}
+	left, right, count := 0, 0, len(p)
+
+	for right < len(s) {
+		if freq[s[right]-'a'] >= 1 {
+			count--
+		}
+		freq[s[right]-'a']--
+		right++
+		if count == 0 {
+			result = append(result, left)
+		}
+		if right-left == len(p) {
+			if freq[s[left]-'a'] >= 0 {
+				count++
+			}
+			freq[s[left]-'a']++
+			left++
+		}
+
+	}
+	return result
+}