Submission #967756

#	Time	Username	Problem	Language	Result	Execution time	Memory
967756		inesfi	Rack (eJOI19_rack)	C++14	100 / 100	6 ms	600 KiB

rack

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

#define int long long
#define endl "\n"

const int TAILLEMAXI=1000*1000+2,MODULO=1000*1000*1000+7;
int puiss,nbamettre,rep,ec;
int droite[TAILLEMAXI];

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin>>puiss>>nbamettre;
    for (int i=0;i<puiss;i++){
        if (nbamettre%2==0){
            droite[i]=1;
        }
        nbamettre+=1;
        nbamettre/=2;
    }
    ec=1;
    rep=1;
    for (int i=puiss-1;i>=0;i--){
        if (droite[i]==1){
            rep+=ec;
        }
        ec*=2;
        ec%=MODULO;
        rep%=MODULO;
    }
    cout<<rep<<endl;
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 60 / 60