if n=1 the answer a=0 p=2 is wrong!
The correct answer is a=1 p=1

Answer 1 1, but WA2
#include<iostream>
#include<cmath>
using namespace std;

int main()
{
int n;
int a;
int p;
int x,y;
int i,j;
int result=0;
cin>>n;

a=sqrt((float)n)+1;
p=a;
x=y=0;

for (i=1;i<=a;i++)
{
    result=0;
    for (j=1;j<=p;j++)
    {
    result+=(i+(j-1));
        if (result==n)
        {
            if (y<j)
            {
                x=i;
                y=j;
            }
        }
    }
}
cout<<x<<" "<<y<<endl;
return 0;
}