51Nod1080 两个数的平方和

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
  long long a,i;
  cin>>a;
  int flag=1;
  for(i=2;i<=sqrt(a);i++)
  {
    long long b=a-i*i;
    if((int)sqrt(b)<i)
      break;
    if((int)sqrt(b)*(int)sqrt(b)==b)
    {
      cout<<i<<" "<<sqrt(b)<<endl;
      flag=0;
    }   
  }
  if(flag&&a!=1)
    cout<<"No Solution"<<endl;
  if(a==1)
    cout<<"0 1"<<endl;
  return 0;
}