CF 7C Line

#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <cmath>
using namespace std;
typedef long long LL;

LL gcd(LL a,LL b)
{
return b ? gcd(b,a%b):a;
}
void ex_gcd(LL a,LL b,LL &x,LL &y)
{
if(b == 0)
{
x = 1;
y = 0;
return ;
}
ex_gcd(b,a%b,x,y);
LL tmp = x;
x = y;
y = tmp-(a/b)*y;
}
int main()
{
// Ax + By = -C
LL A,B,C;
while(cin>>A>>B>>C)
{
C = -C;
LL k = gcd(A,B);
if(C%k)
cout<<"-1"<<endl;
else
{
A /= k,B /= k,C /= k;
//            cout<<A<<" "<<B<<" "<<C<<endl;
LL x,y;
ex_gcd(A,B,x,y);
//            cout<<x<<" "<<y<<endl;
x *= C;
y *= C;
cout<<x<<" "<<y<<endl;
}
}
return 0;
}