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Sunday, March 17, 2013

acm 10110 Light,more light

#include<stdio.h>
#include<math.h>
int main()
{
    long i,n,sum,j;
    while(scanf("%ld",&n)==1)
    {
        if(n==0)
        break;
        i=sqrt(n);
        if(i*i==n)
        printf("yes\n");
        else
        printf("no\n");
    }
    return 0;
}

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