#include <stdio.h>
#include <stdlib.h>
int main ()
{long  int a=250621,s;
char d;
do
{
    scanf ("%d",&s);
    if (s==a)
        printf("成功进入");
    else
        printf("错误\n");

    scanf ("%c",&d);//这句一直不运行
}
while (d=='y'||d=='Y');

system ("pause");
}