Submission #488399

#	Time	Username	Problem	Language	Result	Execution time	Memory
488399		AmirElarbi	Secret (JOI14_secret)	C++14	100 / 100	442 ms	8328 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
#define vi vector<int>
#define ve vector
#define ll long long
#define vf vector<float>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define fi first
#define se second
#define INF 1e9
#define eps 1e-7
#define eps1 1e-25
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
#define V 450
using namespace std;
const int MOD = 1e9+7;
const int nax = 2005;
int n;
vi s;
int t[nax][nax];
void solve(int L, int R) {
    int md = (L + R)/2;
    t[md][md] = s[md];
    t[md + 1][md + 1] = s[md + 1];
    for(int l = md + 2; l <= R; l++)
        t[md + 1][l] = Secret(t[md + 1][l - 1], s[l]);
    for(int l = md - 1; l >= L; l--)
        t[md][l] = Secret(s[l], t[md][l+1]);
    if(L < md) solve(L, md);
    if(md + 1 < R) solve(md + 1, R);
}   
void Init(int N, int A[]){
    n = N;
    for (int i = 0; i < N; ++i)
    {
        s.pb(A[i]);
    }
    solve(0,n-1);
}
int Query(int L, int R){
    int l = 0, r = n-1;
    while(l != r){
        int md = (l+r)/2;
        if(md >= L && md < R)
                    return Secret(t[md][L], t[md+1][R]);
        else if(md == R) return t[md][L];
        else if(md < L)
            l = md+1;
        else
            r = md;
    }
    return t[l][l];
}

• Subtask 1: 100 / 100