Submission #48660

#	Time	Username	Problem	Language	Result	Execution time	Memory
48660		Pajaraja	Secret (JOI14_secret)	C++17	100 / 100	667 ms	9480 KiB

secret

#include "secret.h"
#include <bits/stdc++.h>
#define MAXN 1007
using namespace std;
int val[MAXN][MAXN],a[MAXN],n;
void rek(int l,int r)
{
	int s=(l+r)/2;
	for(int i=s-1;i>=l;i--) val[i][s]=Secret(a[i],val[i+1][s]);
	for(int i=s+2;i<=r;i++) val[s+1][i]=Secret(val[s+1][i-1],a[i]);
	if(l==r) return;
	rek(l,s);
	rek(s+1,r);
}
void Init(int N, int A[]) 
{
	n=N;
	for(int i=0;i<n;i++) val[i][i]=a[i]=A[i];
	rek(0,n-1);
}

int ans(int l,int r,int lt,int rt)
{
	if(l==r) return a[l];
	int s=(l+r)/2;
	if(lt<=s && rt>s) return Secret(val[lt][s],val[s+1][rt]);
	if(rt<=s) return ans(l,s,lt,rt);
	return ans(s+1,r,lt,rt);
}
int Query(int L, int R)  {return ans(0,n-1,L,R);}

• Subtask 1: 100 / 100