Submission #728916

#	Time	Username	Problem	Language	Result	Execution time	Memory
728916		Cookie	Secret (JOI14_secret)	C++14	0 / 100	488 ms	4504 KiB

secret

#include "secret.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#include <stdio.h>
#include <stdlib.h>
const int mxn = 1000;
int tab[10][mxn + 1], mask[mxn + 1];
vt<int>v;
void build(int l, int r, int lev){
    if(l == r)return;
    int mid = (l + r) >> 1;
    tab[lev][mid] = v[mid];
    for(int i = mid - 1; i >= l; i--){
        tab[lev][i] = Secret(tab[lev][i + 1], v[i]);
    }
    tab[lev][mid + 1] = v[mid + 1];
    for(int i = mid + 2; i <= r; i++){
        tab[lev][i] = Secret(tab[lev][i - 1], v[i]);
    }
    for(int i = mid + 1; i <= r; i++)mask[i] ^= (1 << lev);
    build(l, mid, lev + 1); build(mid + 1, r, lev + 1);
    
}
void Init(int n, int a[]){
    for(int i = 0; i < n; i++)v.pb(a[i]);
    
    build(0, n - 1, 0);
}
int Query(int l, int r){
    if(l == r)return(v[l]);
    int level = __builtin_ctz(mask[l] ^ mask[r]);
    return(Secret(tab[level][l], tab[level][r]));
}

• Subtask 1: 0 / 100