HDU2043密码的可行性

#include<stdio.h>#include<string.h>int main(){    bool flage;    int m,n;    int i;    int a,b,c,d;    char s[55];    scanf("%d",&m);    getchar();    while(m--){        a=0;        b=0;        c=0;        d=0;        flage=1;        gets(s);        n=strlen(s);        if(n<8||n>16)         flage=0;        for(i=0;i<n;i++)        {            if(s[i]>='a'&&s[i]<='z')a=1;            if(s[i]>='A'&&s[i]<='Z')b=1;            if(s[i]>='0'&&s[i]<='9')c=1;            if(s[i]=='~'||s[i]=='!'||s[i]=='@'||s[i]=='#'||s[i]=='$'||s[i]=='%'||s[i]=='^')d=1;        }        if(a+b+c+d<3)flage=0;        if(flage)        printf("YES\n");        else printf("NO\n");        }        return 0;    }