HDU 2043 - 密码

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=2043

#include <ctype.h>#include <stdio.h>int main(void){    int n, a[6];    char c;    scanf("%d%*c", &n);    while (n--)    {        a[0] = a[1] = a[2] = a[3] = a[4] = a[5] = 0;        while ((c = getchar()) != '\n')        {            if (isupper(c))                a[0] = a[5]++;            else if (islower(c))                a[1] = a[5]++;            else if (isdigit(c))                a[2] = a[5]++;            else                a[3] = a[5]++;        }        if (a[0]) a[4]++;        if (a[1]) a[4]++;        if (a[2]) a[4]++;        if (a[3]) a[4]++;        puts(a[4] > 2 && a[5] > 7 && a[5] <17 ? "YES" : "NO");    }    return 0;}