oj.uz

Submission #1085788

# Submission time Handle Problem Language Result Execution time Memory
1085788 2024-09-08T17:29:42 Z f0rizen Secret (JOI14_secret) C++17
100 / 100
 325 ms 4472 KB 
#include "secret.h"

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
const int inf = 1e9 + 7;
const ll infll = 1e18;

const int lg = 10;

int *a;
vector<int> st[lg];
vector<int> mask;

void Init(int N, int A[]) {
    a = A;
    for (int i = 0; i < lg; ++i) {
        st[i].resize(N);
    }
    mask.resize(N);
    auto calc = [&](auto calc, int l, int r, int k) -> void {
        if (l == r) {
            return;
        }
        int mid = (l + r) / 2;
        st[k][mid] = A[mid];
        for (int i = mid - 1; i >= l; --i) {
            st[k][i] = Secret(A[i], st[k][i + 1]);
        }
        st[k][mid + 1] = A[mid + 1];
        for (int i = mid + 2; i <= r; ++i) {
            st[k][i] = Secret(st[k][i - 1], A[i]);
        }
        for (int i = mid + 1; i <= r; ++i) {
            mask[i] ^= (1 << k);
        }
        calc(calc, l, mid, k + 1);
        calc(calc, mid + 1, r, k + 1);
    };
    calc(calc, 0, N - 1, 0);
}

int Query(int L, int R) {
    if (L == R) {
        return a[L];
    }
    int k = __builtin_ctz(mask[L] ^ mask[R]);
    return Secret(st[k][L], st[k][R]);
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 87 ms 2548 KB Output is correct - number of calls to Secret by Init = 3578, maximum number of calls to Secret by Query = 1
2 Correct 86 ms 2492 KB Output is correct - number of calls to Secret by Init = 3586, maximum number of calls to Secret by Query = 1
3 Correct 86 ms 2368 KB Output is correct - number of calls to Secret by Init = 3595, maximum number of calls to Secret by Query = 1
4 Correct 309 ms 4436 KB Output is correct - number of calls to Secret by Init = 7969, maximum number of calls to Secret by Query = 1
5 Correct 308 ms 4384 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
6 Correct 308 ms 4432 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
7 Correct 325 ms 4472 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
8 Correct 308 ms 4316 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
9 Correct 315 ms 4436 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1
10 Correct 312 ms 4436 KB Output is correct - number of calls to Secret by Init = 7978, maximum number of calls to Secret by Query = 1