CF Good Bye 2018 C

#include<bits/stdc++.h>
using namespace std;

int main()
{
    set<long long int>s;
    long long int n,i,x,y,j,z;
    cin>>n;
    for(i=1;i*i<=n;i++){
        if(n%i!=0)
            continue;
        x=n/i;
        j=x;
        y=n-i+2;
        z=0;
        if(x%2!=0)
            z=y/2;
        y=((x/2)*y)+z;
        s.insert(y);
        if(x==i)
            continue;
        x=n/j;
        y=n-j+2;
        z=0;
        if(x%2!=0)
            z=y/2;
        y=((x/2)*y)+z;
        s.insert(y);
    }
    for(auto it=s.begin();it!=s.end();it++)
        cout<<*it<<" ";
    return 0;
}