#include <bits/stdc++.h>
using namespace std;
int main(){
    int D,VF,VG;
    while(cin>>D){
        cin>>VF;
        cin>>VG;
        double v2 = (double)(D*D)+(double)(VF*VF);
        double val=sqrt(v2);
        double t1 = (double)12.0/VF;
        double t2 = (double)val/VG;
        if(t1>t2){
            cout<<"S"<<endl;
        }
        else{
            if(t2>=t1){
                cout<<"N"<<endl;
            }
        }
    }
}