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Submission #731760

# Submission time Handle Problem Language Result Execution time Memory
731760 2023-04-27T22:17:51 Z AtabayRajabli Rack (eJOI19_rack) C++11
100 / 100
 1 ms 320 KB 
#include <bits/stdc++.h>
#define pb push_back
#define pii pair<int, int>
#define pll pair<ll, ll>
#define MAX 5e4 + 1
#define all(v) v.begin(), v.end()
#define sz(v) v.size()
#define INF 0x3F3F3F3F3F3F3F3FLL
#define OPT ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define sec second
#define fi first

typedef long long ll;
typedef unsigned long long ull;
using namespace std;

ll binpow(ll a, ll b, ll c)
{
    ll res = 1;
    a%=c;

    while(b > 0)
    {
        if(b & 1)
        {
            res = res * a % c;
        }
        a = a * a % c;
        b >>= 1;
    }

    return res;
}

void $()
{
    ll n, k, mod = 1e9 + 7;
    cin >> n >> k;
    k--;

    ll res = 1;

    while(k)
    {
        n--;
        if(k & 1)
        {
            res = (res + binpow(2, n, mod))%mod;
        }

        k >>= 1;
    }

    cout << res << endl;
}

int main()
{
    OPT

    int t = 1;

    while(t--)
        $();
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct