求调（WA on #5）

#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
    int n,y,s,t;
    cin>>n>>y>>s>>t;
    for(int i=1;i<=n;i++){
        //(i-1)*s-y=j*t
        //i*s-y=j*t
        // cout<<((i-1)*s-y)<<" "<<((i)*s-y)<<endl;
        if(abs(((i-1)*s-y))%t!=0&&abs((i*s-y))%t!=0){
            cout<<"Yes";
            return 0;
        }
    }
    cout<<"No";
}