Submission #735835

#	Time	Username	Problem	Language	Result	Execution time	Memory
735835		sandry24	Secret (JOI14_secret)	C++17	100 / 100	484 ms	12228 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define pb push_back
#define mp make_pair
#define f first
#define s second

const int MAX_N = 1005;
int meetpoint[MAX_N][MAX_N];
int res[MAX_N][MAX_N];

void build(int l, int r){
    if(l >= r)
        return;
    int mid = (l+r)/2;
    for(int i = l; i <= mid; i++){
        for(int j = mid+1; j <= r; j++)
            meetpoint[i][j] = mid;
    }
    for(int i = mid+2; i <= r; i++)
        res[mid+1][i] = Secret(res[mid+1][i-1], res[i][i]);
    for(int i = mid-1; i >= l; i--)
        res[i][mid] = Secret(res[i][i], res[i+1][mid]);
    build(l, mid);
    build(mid+1, r);
}

void Init(int N, int A[]){
    for(int i = 0; i < N; i++){
        for(int j = 0; j < N; j++){
            res[i][j] = (i == j ? A[i] : -1);
        }
    }
    build(0, N-1);
}

int Query(int L, int R){
    if(res[L][R] != -1)
        return res[L][R];
    int mid = meetpoint[L][R];
    return Secret(res[L][mid], res[mid+1][R]);
}

• Subtask 1: 100 / 100