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Submission #532588

# Submission time Handle Problem Language Result Execution time Memory
532588 2022-03-03T09:11:59 Z PsiolixUK Rack (eJOI19_rack) C++14
100 / 100
 12 ms 308 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
constexpr int MOD = 1e9 + 7;
main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n;
    ll k;
    int pow = 1;
    int odp = 1;
    cin >> n >> k;
    --k;
    for(int i = 0; i < n; ++i)
    {
        if(k%2)
        {
            odp = ((ll)2 * odp + 1) % MOD;
        }
        else
        {
            odp = ((ll)2 * odp) % MOD;
        }
        k /= 2;
    }
    for(int i = 0; i < n; ++i)
        pow = ((ll)pow * 2) % MOD;
    cout << (odp - pow + 1 + MOD) % MOD;
}

Compilation message

rack.cpp:5:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    5 | main()
      | ^~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 12 ms 308 KB Output is correct