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Submission #657724

# Submission time Handle Problem Language Result Execution time Memory
657724 2022-11-10T20:31:25 Z bebra Dojave (COCI17_dojave) C++17
126 / 140
 715 ms 56488 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;
    vector<unordered_map<uint64_t, int>> pos(4);
    ++pos[0][0];
    uint64_t pref = 0;
    for (int i = 1; i <= n; ++i) {
        pref ^= xor_hash[s[i - 1]];
        ans -= pos[i % 4][pref];
        ++pos[i % 4][pref];
    }
    cout << ans << '\n';
    return 0;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 3 ms 724 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1108 KB Output is correct
2 Correct 4 ms 852 KB Output is correct
3 Correct 4 ms 852 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 3712 KB Output is correct
2 Correct 15 ms 3032 KB Output is correct
3 Correct 40 ms 5840 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 3816 KB Output is correct
2 Correct 31 ms 5868 KB Output is correct
3 Correct 89 ms 13060 KB Output is correct

Subtask #8
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 14220 KB Output is correct
2 Correct 69 ms 11544 KB Output is correct
3 Correct 81 ms 11720 KB Output is correct

Subtask #9
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 695 ms 56368 KB Output is correct
2 Correct 636 ms 56376 KB Output is correct
3 Correct 316 ms 34664 KB Output is correct

Subtask #10
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 691 ms 56488 KB Output is correct
2 Correct 498 ms 45364 KB Output is correct
3 Correct 486 ms 48456 KB Output is correct
4 Correct 715 ms 56404 KB Output is correct