Submission #877533

#	Time	Username	Problem	Language	Result	Execution time	Memory
877533		serkanrashid	Secret (JOI14_secret)	C++14	100 / 100	388 ms	4604 KiB

secret

#include "secret.h"
#include <bits/stdc++.h>

using namespace std;

const int maxn = 1024;

int n,a[maxn];
int pref[maxn][16],suff[maxn][16];

int query(int l, int r, int lvl, int L, int R)
{
    if(l>r) return 0;
    int mid = (l+r)/2;
    if(L<=mid&&mid<=R)
    {
        int chis = pref[L][lvl];
        if(R!=mid) chis = Secret(chis,suff[R][lvl]);
        return chis;
    }
    if(R<mid) return query(l,mid-1,lvl+1,L,R);
    return query(mid+1,r,lvl+1,L,R);
}

int Query(int L, int R)
{
    int ans = query(0,n-1,1,L,R);
    return ans;
}

void divide(int l, int r, int lvl)
{
    if(l>r) return;
    int mid = (l+r)/2;
    pref[mid][lvl] = a[mid];
    for(int i=mid-1;i>=l;i--) pref[i][lvl] = Secret(a[i],pref[i+1][lvl]);
    if(mid!=r) suff[mid+1][lvl] = a[mid+1];
    for(int i=mid+2;i<=r;i++) suff[i][lvl] = Secret(suff[i-1][lvl],a[i]);
    divide(l,mid-1,lvl+1);
    divide(mid+1,r,lvl+1);
}

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

• Subtask 1: 100 / 100