Submission #1110542

#	Time	Username	Problem	Language	Result	Execution time	Memory
1110542		vladilius	Secret (JOI14_secret)	C++17	0 / 100	20030 ms	4520 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second

vector<vector<int>> x;
vector<int> a;
int n, lg;

void build(int d, int l, int r){
    if (abs(l - r) <= 1) return;
    int m = (l + r) / 2;
    x[d][m] = a[m];
    for (int i = m - 1; i >= l; i--){
        x[d][i] = Secret(x[d][i + 1], a[i]);
    }
    x[d][m + 1] = a[m + 1];
    for (int i = m + 2; i <= r; i++){
        x[d][i] = Secret(x[d][i - 1], a[i]);
    }
    
    build(d + 1, l, m);
    build(d + 1, m + 1, r);
}

void Init(int ns, int A[]){
    n = ns;
    a.resize(n + 1);
    for (int i = 1; i <= n; i++){
        a[i] = A[i - 1];
    }
    
    lg = log2(n);
    x.resize(lg + 1);
    for (int i = 0; i <= lg; i++){
        x[i].resize(n + 1);
    }
    build(0, 1, n);
}

int get(int d, int tl, int tr, int& l, int& r){
    int tm = (tl + tr) / 2;
    if (l <= tm && tm < r){
        return Secret(x[d][l], x[d][r]);
    }
    return (r <= tm) ? get(d + 1, tl, tm, l, r) : get(d + 1, tm + 1, tr, l, r);
}

int Query(int l, int r){
    l++; r++;
    if ((l + 1) == r) return Secret(a[l], a[r]);
    return get(0, 1, n, l, r);
}

• Subtask 1: 0 / 100