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// @Title: 猜数字游戏 (Bulls and Cows)
// @Author: 15816537946@163.com
// @Date: 2021-11-08 01:29:44
// @Runtime: 24 ms
// @Memory: 2.3 MB
func getHint(secret string, guess string) string {
	record := make(map[byte]int)
	n := len(secret)
	var aCnt, bCnt int

	for i := 0; i < n; i++ {
		if secret[i] == guess[i] {
            /*
			if _, ok := record[secret[i]]; ok {
				record[secret[i]]--
			} else {
				record[secret[i]] = 0
			}
            */

			aCnt++
			//continue
		}

		if _, ok := record[guess[i]]; ok {
			record[guess[i]]++
		} else {
			record[guess[i]] = 1
		}
	}

	for i := 0; i < n; i++ {
		if cnt, ok := record[secret[i]]; ok {
			if cnt > 0 {
                fmt.Println("before",record[secret[i]])
				record[secret[i]]--
                fmt.Println("after",record[secret[i]])
				bCnt++
			}
		}

	}

	return fmt.Sprintf("%dA%dB", aCnt, bCnt-aCnt)
}