HDU oj password



#include<stdio.h>
#include<string.h>
main()
{
int m;
scanf("%d",&m);
char a[50];
getchar();
while(m--)
{
int k,i,x=0,y=0,z=0,h=0;
gets(a);
k=strlen(a);
if(k<8||k>16) printf("NO\n");
else
{
for(i=0;i<k;i++)
{
  if(a[i]>='a'&&a[i]<='z')
   x++;
      else if(a[i]>='A'&&a[i]<='Z')
       y++;
      else if(a[i]>='0'&&a[i]<='9')
   z++;
      else if(a[i]=='~'||a[i]=='!'||a[i]=='@'||a[i]=='#'||a[i]=='$'||a[i]=='%'||a[i]=='^')
   h++;
    }
    if((x==0&&y==0)||(x==0&&z==0)||(x==0&&h==0)||(y==0&&z==0)||(y==0&&h==0)||(z==0&&h==0)||(x==0&&y==0&&z==0)||(x==0&&y==0&&h==0)||(y==0&&z==0&&h==0)||(x==0&&y==0&&z==0&&h==0))
 {printf("NO\n");}
else printf("YES\n");
    }
}
}