求佩尔方程的解

#include <stdio.h>

#include <math.h>

int main()

{     

    int n;

    while(scanf("%d",&n)!=EOF){

    long j,i,k;

      

        for(k=1;k<=n;k++){

            int a;      

            scanf("%d",&a) ;

        int flag=0;

        for(i=1;i<=10000;i++){

            

              if((int)sqrt(1+a*i*i)*(int)sqrt(1+a*i*i)==1+a*i*i)

             {

                printf("%ld\n",i);

                flag =1;

                break;

     

             }

        }

            if(flag==0)   printf("No\n");

      

        } 

}

    return 0;

}

 

#include <stdio.h>
#include <math.h>
int main()
{
    int t,n;
    int i,j;
    int a,b;
    
    while(scanf("%d",&t)!=EOF)
    {
        while(t--)
        { 
            int flag=0;
            scanf("%d",&n);
            for(i=1;i<=10000;i++)
            {
                if((int)sqrt(i*i*n+1)*(int)sqrt(i*i*n+1)==n*i*i+1)
                {
                    printf("%d\n",i);
                    flag=1;
                    break;
                }
            }
            if(flag==0)
            {
                printf("No\n");
            }
        }
    }
    return 0;
}