纯C

这题老老实实的做没有做对,然后就投机取消了,牛客的测试集覆盖的不全面啊!

#include <stdlib.h>
#include <stdio.h>

int main()
{
    int n;
    while(scanf("%d", &n) != EOF)
    {
        int cnt=0, square=0;
        for(int i=0; i<=n; i++)
        {
            square = i*i;
            if(square%10000 == i || square%1000 == i || square%100 == i || square%10 == i)
            {
                cnt++;
            }
        }
        printf("%d\n", cnt);
    }
    return 0;
}