Submission #77728

#	Time	Username	Problem	Language	Result	Execution time	Memory
77728		nxteru	비밀 (JOI14_secret)	C++14	100 / 100	638 ms	9404 KiB

secret

#include <iostream>
#include <vector>
#include "secret.h"
using namespace std;
int n,a[1005][1005];
void bt(int l,int r){
    int m=(l+r)/2;
    for(int i=m-1;i>=l;i--){
        a[i][m]=Secret(a[i][i],a[i+1][m]);
    }
    for(int i=m+2;i<=r;i++){
        a[m+1][i]=Secret(a[m+1][i-1],a[i][i]);
    }
    if(l+3<=m)bt(l,m);
    if(m+4<=r)bt(m+1,r);
}
void Init(int N,int *A){
    n=N;
    for(int i=0;i<n;i++)a[i][i]=A[i];
    bt(0,n-1);
}
int ans(int L,int R,int l,int r){
    int m=(l+r)/2;
    if(R<m)return ans(L,R,l,m);
    if(m+1<L)return ans(L,R,m+1,r);
    if(R==m||L==m+1)return a[L][R];
    return Secret(a[L][m],a[m+1][R]);
}
int Query(int l,int r){
    return ans(l,r,0,n-1);
}

• Subtask 1: 100 / 100