题解 | #[NOIP2008]笨小猴#

#include<string.h>
int output(int a) {  //判断是否为质素
    int count = 0;
    for (int i = 1; i <= a; i++) {
        if (a % i == 0) count++;
    }
    if (count == 2) return a;  //是，返回传入值a
    else return 0;  //否，返回0
}
int main() {
    int maxn = 0, minn = 100, count = 0, sizen;
    char s[100];
    scanf("%s", &s);
    sizen = strlen(s);
    for (int i = 0; i < sizen; i++) {  //记录每个相同单词的个数
        for (int j = 0; j < sizen; j++) {
            if (s[i] == s[j]) count++;
        }
        if (count > maxn) maxn = count;  //记录最大个数
        if (count < minn) minn = count;  //记录最小个数
        count = 0;
    }
    int val = output(maxn - minn);
    if (val != 0) printf("Lucky Word\n%d", val);  //返回值不为0时，结果为质素
    else printf("No Answer\n0");  //否则结果不为质素
    return 0;
}