oj.uz

답안 #657722

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
657722 2022-11-10T20:25:22 Z bebra Dojave (COCI17_dojave) C++17
126 / 140
 682 ms 63692 KB 
#include <bits/stdc++.h>
using namespace std;

#define dbg(x) cerr << #x << ": " << x << endl;


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int m;
    cin >> m;
    const int n = 1 << m;
    int max_mask = n - 1;
    vector<int> s(n);
    vector<uint64_t> xor_hash(n);
    mt19937_64 rng(123);
    for (int i = 0; i < n; ++i) {
        int x;
        cin >> x;
        if (x & (1 << (m - 1))) x ^= max_mask;
        s[i] = x;
        xor_hash[i] = rng();
    }
    long long ans = 1LL * n * (n + 1) / 2;
    vector<unordered_map<uint64_t, int>> pos(4);
    ++pos[3][0];
    uint64_t pref = 0;
    for (int i = 0; i < n; ++i) {
        pref ^= xor_hash[s[i]];
        ans -= pos[i % 4][pref];
        ++pos[i % 4][pref];
    }
    cout << ans << '\n';
    return 0;
}

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 316 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 456 KB Output is correct
2 Correct 2 ms 468 KB Output is correct

Subtask #4
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 2 ms 780 KB Output is correct

Subtask #5
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 1236 KB Output is correct
2 Correct 4 ms 980 KB Output is correct
3 Correct 4 ms 844 KB Output is correct

Subtask #6
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 4172 KB Output is correct
2 Correct 16 ms 3396 KB Output is correct
3 Correct 37 ms 6612 KB Output is correct

Subtask #7
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 4180 KB Output is correct
2 Correct 34 ms 6696 KB Output is correct
3 Correct 87 ms 14856 KB Output is correct

Subtask #8
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 109 ms 15944 KB Output is correct
2 Correct 71 ms 13248 KB Output is correct
3 Correct 85 ms 13396 KB Output is correct

Subtask #9
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 682 ms 63692 KB Output is correct
2 Correct 642 ms 63528 KB Output is correct
3 Correct 290 ms 41604 KB Output is correct

Subtask #10
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 677 ms 63668 KB Output is correct
2 Correct 473 ms 52524 KB Output is correct
3 Correct 576 ms 55508 KB Output is correct
4 Correct 672 ms 63636 KB Output is correct