oj.uz

답안 #657726

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
657726 2022-11-10T20:40:55 Z bebra Dojave (COCI17_dojave) C++17
140 / 140
 692 ms 56696 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;
    int n = 1 << m;
    int max_mask = n - 1;
    vector<int> s(n);
    vector<uint64_t> xor_hash(n);
    mt19937_64 rng(1233);
    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 - (m == 1);
    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
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 320 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct

Subtask #3
14.0 / 14.0

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

Subtask #4
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 724 KB Output is correct

Subtask #5
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 1108 KB Output is correct
2 Correct 4 ms 840 KB Output is correct
3 Correct 4 ms 976 KB Output is correct

Subtask #6
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 3772 KB Output is correct
2 Correct 16 ms 3044 KB Output is correct
3 Correct 35 ms 5872 KB Output is correct

Subtask #7
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 3788 KB Output is correct
2 Correct 30 ms 5832 KB Output is correct
3 Correct 90 ms 13076 KB Output is correct

Subtask #8
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 115 ms 14232 KB Output is correct
2 Correct 73 ms 11464 KB Output is correct
3 Correct 71 ms 11696 KB Output is correct

Subtask #9
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 692 ms 56696 KB Output is correct
2 Correct 663 ms 56444 KB Output is correct
3 Correct 286 ms 34472 KB Output is correct

Subtask #10
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 674 ms 56492 KB Output is correct
2 Correct 479 ms 45544 KB Output is correct
3 Correct 561 ms 48436 KB Output is correct
4 Correct 661 ms 56480 KB Output is correct