Submission #536198

#	Time	Username	Problem	Language	Result	Execution time	Memory
536198		michao	Secret (JOI14_secret)	C++14	0 / 100	20095 ms	4396 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
#define mp make_pair
#define pb push_back
#define ld long double
#define pii pair<int,int>
#define sz(x) (int)x.size()
#define piii pair<pii,pii>
#define precise cout<<fixed<<setprecision(10)
#define st first
#define nd second
#define ins insert
#define vi vector<int>
#define BOOST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std;
const int MAX=1e3+5;
int pref[MAX][MAX];
int suf[MAX][MAX];
int n;
int a[MAX];
void rec1(int l,int r){
	if (l>r)return;
	int mid=(l+r)>>1;
	pref[mid][mid]=a[mid];
	suf[mid][mid+1]=a[mid+1];
	for (int i=mid-1;i>=l;i--){
		pref[mid][i]=Secret(a[i],pref[mid][i+1]);
	}
	
	for (int i=mid+1;i<=r;i++){
		suf[mid][i]=Secret(suf[mid][i-1],a[i]);
	}	
	rec1(l,mid);
	rec1(mid+1,r);
}

void Init(int N,int A[]){
	n=N;
	for (int i=0;i<n;i++)a[i]=A[i];
	rec1(0,n-1);
}

int rec2(int l,int r,int L,int R){
	int mid=(l+r)>>1;
	if (l<L)return rec2(l,mid,L,R);
	if (r>R)return rec2(mid+1,r,L,R);
	return Secret(pref[mid][l],suf[mid][r]);
}	

int Query(int L,int R){
	return rec2(0,n-1,L,R);
}

• Subtask 1: 0 / 100