HackerRank_Kangaroo

//Kangaroo
#include <iostream>
using namespace std;
int main()
{
    int x1, x2, v1, v2, ats=0;
    cin >> x1 >> v1 >> x2 >> v2;
    if(x1>x2)
    {
        while(x1>=x2)
        {
            if(x1==x2)
            {
                ats=1;
            }
            x1=x1+v1;
            x2=x2+v2;
        }
    }
    else if(x2>=x1)
    {
        while(x2>=x1)
        {
            if(x1==x2)
            {
                ats=1;
            }
            x1=x1+v1;
            x2=x2+v2;
        }
    }
    if(ats==0){cout<<"NO"<<endl;}else{cout<<"YES"<<endl;}
    return 0;
}