2.生日蜡烛

#include<iostream>
using namespace std;
int main()
{
    int x,y;
    for( x=1,y=2; x<100; x++)
        for( y=x+1; (y+x)*(y-x+1) <= 472; y++)
        {
            //cout<<x<<" "<<y<<" "<<(y+x)*(y-x+1)<<endl;
            if((y+x)*(y-x+1) == 472)
            {
                cout<<x<<endl;
                return 0;
            }

        }
        return 0;
}