제출 #1312167

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1312167		VMaksimoski008	Rack (eJOI19_rack)	C++20	40 / 100	8 ms	8184 KiB

rack

#include <bits/stdc++.h>
#define ar array
//#define int long long

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

constexpr int mod = 1e9 + 7;
const ll inf = 1e18;
const int N = 1e6 + 5;

ll pw[N];

signed main() {
    pw[0] = 1;
    for(int i=1; i<N; i++)
        pw[i] = (pw[i-1] * 2) % mod;

    ll ans = 1;
    int n, m; cin >> n >> m;

    ll len = 1; m--;
    for(int b=min(n-1, 61); b>=0; b--) {
        if(m % (len << 1) >= len) ans = (ans + pw[b]) % mod;
        len <<= 1;  
    }

    cout << ans << '\n';
}

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 0 / 60