add sol

leetcode/daily/1400/sol.go

@@ -0,0 +1,57 @@
+// https://leetcode.com/problems/construct-k-palindrome-strings/description/
+
+package main
+
+import "fmt"
+
+func canConstruct(s string, k int) bool {
+	// count freq
+	freq := make(map[rune]int)
+	for _, c := range s {
+		freq[c]++
+	}
+
+	// count odd freq
+	odd := 0
+	for _, v := range freq {
+		if v%2 != 0 {
+			odd++
+		}
+	}
+
+	// check conditions
+	return k <= len(s) && odd <= k
+}
+
+func canConstruct2(s string, k int) bool {
+	if len(s) < k {
+		return false
+	}
+
+	// count freq
+	freq := make([]int, 26)
+	for _, c := range s {
+		freq[c-'a']++
+	}
+
+	// count odd freq
+	odd := 0
+	for _, v := range freq {
+		if v%2 == 1 {
+			odd++
+		}
+	}
+
+	if odd > k {
+		return false
+	}
+
+	return true
+}
+
+func main() {
+	s := "annabelle"
+	k := 2
+
+	fmt.Println(canConstruct2(s, k))
+}