缘由样例通过，请问为什么错了呢？(语言-c语言)-编程语言-CSDN问答

	char str[100000];fgets(str, 100000, stdin);int a[26]{}, i, count = 0;int len = strlen(str);for (i = 0; i<len; i++)	a[str[i] - 'a']++;for (i = 0; i<len; i++){if (a[str[i] - 'a'] == 1){printf("%c", str[i]);count++;break;}}if (count == 0)printf("no");