HDU2043 密码

解题思路：10分钟AC，不解释，so easy！

 #include<cstdio>
 #include<cstring>
 #include<algorithm>
 using namespace std;
 const int maxn = ;
 char str[maxn];
 int n;
 int main()
 {
     scanf("%d", &n);
     while(n--)
     {
         scanf("%s", str);
         int len = strlen(str);
         int cnt = ;
         int cnt1, cnt2, cnt3, cnt4;
         cnt1 = cnt2 = cnt3 = cnt4 = ;
         for(int i = ; i < len; i++)
         {
             if(str[i] >= 'a' && str[i] <= 'z') cnt1 = ;
             else if(str[i] >= 'A' && str[i] <= 'Z') cnt2 = ;
             else if(str[i] >= '' && str[i] <= '') cnt3 = ;
             else cnt4 = ;
         }
         cnt = cnt1 + cnt2 + cnt3 + cnt4;
         if(cnt >=  && len >= && len <= ) printf("YES\n");
         else printf("NO\n");
     }
     return ;
 }