Submission #540774

#	Time	Username	Problem	Language	Result	Execution time	Memory
540774		Yazan_Alattar	Secret (JOI14_secret)	C++14	100 / 100	448 ms	18496 KiB

secret

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 300007;
const ll inf = 2e9;
const ll mod = 1e9+7;
const double pi = acos(-1);
const int dx[] = {0, -1, 0, 1}, dy[] = {1, 0, -1, 0};
const int block = 320;

#include "secret.h"
int n, a[M];
vector <int> suf[M], pref[M];

void build(int node = 1, int l = 1, int r = n){
    if(l == r){
        suf[node].pb(a[l]);
        return;
    }
    int mid = (l + r) / 2;
    build(2 * node, l, mid);
    build(2 * node + 1, mid + 1, r);

    int x = a[mid];
    suf[node].pb(x);
    for(int i = mid - 1; i >= l; --i){
        x = Secret(a[i], x);
        suf[node].pb(x);
    }
    x = a[mid + 1];
    pref[node].pb(x);
    for(int i = mid + 2; i <= r; ++i){
        x = Secret(x, a[i]);
        pref[node].pb(x);
    }
    return;
}

void Init(int N, int A[]){
    n = N;
    for(int i = 1; i <= n; ++i) a[i] = A[i - 1];
    build();
    return;
}

int get(int st, int en, int node = 1, int l = 1, int r = n){
    int mid = (l + r) / 2;
    if(st <= mid && en > mid){
        return Secret(suf[node][mid - st], pref[node][en - mid - 1]);
    }
    if(en <= mid) return get(st, en, 2 * node, l, mid);
    return get(st, en, 2 * node + 1, mid + 1, r);
}

int Query(int L, int R){
    if(L == R) return a[L + 1];
    return get(L + 1, R + 1);
}

• Subtask 1: 100 / 100