Submission #53164

#	Time	Username	Problem	Language	Result	Execution time	Memory
53164		okaybody10	Secret (JOI14_secret)	C++11	100 / 100	715 ms	8492 KiB

secret

#include "secret.h"
#include <bits/stdc++.h>
using namespace std;
 
const int MX=1001;
 
int n, B[MX];
 
int D[MX][MX];
 
void _fill(int s, int e){
    int m=(s+e)/2;
    if(s==e){
        D[m][m]=B[m];
        return;
    }
    D[m][m]=B[m];
    for(int x=m-1; x>=s; x--){
        D[x][m]=Secret(B[x], D[x+1][m]);
    }
    D[m+1][m+1]=B[m+1];
    for(int y=m+2; y<=e; y++)
        D[m+1][y]=Secret(D[m+1][y-1], B[y]);
    _fill(s,m);
    _fill(m+1,e);
}
 
void Init(int N, int A[]) {
    n=N;
    for(int i=0; i<n; i++) B[i]=A[i];
    _fill(0,n-1);
}
int solve(int l, int r, int s, int e){
    int m=(s+e)/2;
    if(l<=m && m+1<=r){
        return Secret(D[l][m], D[m+1][r]);
    }
    if(r<=m) return solve(l,r,s,m);
    else return solve(l,r,m+1,e);
}
 
int Query(int l, int r) {
    if(l==r) return B[l];
    return solve(l,r,0,n-1);
}

• Subtask 1: 100 / 100