add sol

leetcode/daily/3223/sol.go

@@ -0,0 +1,30 @@
+// https://leetcode.com/problems/minimum-length-of-string-after-operations/description/
+
+package main
+
+import "fmt"
+
+func minimumLength(s string) int {
+	freq := [26]int{}
+	for _, v := range s {
+		freq[v-'a']++
+	}
+
+	res := 0
+	for _, v := range freq {
+		if v > 0 {
+			if v&1 == 1 {
+				res += 1
+			} else {
+				res += 2
+			}
+		}
+	}
+
+	return res
+}
+
+func main() {
+	s := "aa"
+	fmt.Println(minimumLength(s))
+}