Submission #520015

#	Time	Username	Problem	Language	Result	Execution time	Memory
520015		amunduzbaev	Secret (JOI14_secret)	C++14	100 / 100	449 ms	12228 KiB

secret

#include "bits/stdc++.h"
#include "secret.h"
using namespace std;
#ifndef EVAL
#include "grader.cpp"
#endif

const int M = 1005;
int a[M], NN;

int ask(int a, int b){
	return Secret(a, b);
}

struct ST{
	int pref[M<<2][M], suff[M<<2][M];
	
	void build(int lx, int rx, int x){
		//~ cout<<lx<<" "<<rx<<"\n";
		if(lx == rx) return;
		int m = (lx + rx) >> 1;
		pref[x][m] = a[m];
		for(int p=m-1;p>=lx;p--){
			pref[x][p] = ask(a[p], pref[x][p+1]);
		}
		
		suff[x][m+1] = a[m+1];
		for(int p=m+2;p<=rx;p++){
			suff[x][p] = ask(suff[x][p-1], a[p]);
		}
		//~ cout<<ask(ask(a[0], a[1]), ask(a[2], a[3]))<<"\n";
		//~ cout<<lx<<" "<<rx<<" "<<ask(pref[x][lx], suff[x][rx])<<"\n";
		build(lx, m, x<<1);
		build(m+1, rx, x<<1|1);
	}
	
	int get(int l, int r, int lx, int rx, int x){
		if(lx == rx) return a[lx];
		int m = (lx + rx) >> 1;
		if(r <= m) return get(l, r, lx, m, x<<1);
		if(m < l) return get(l, r, m+1, rx, x<<1|1);
		return ask(pref[x][l], suff[x][r]);
	}
}tree;

void Init(int N, int A[]) {
	NN = N;
	for(int i=0;i<N;i++){
		a[i] = A[i];
	}
	
	tree.build(0, NN - 1, 1);
}

int Query(int L, int R) {
	return tree.get(L, R, 0, NN - 1, 1);
}

• Subtask 1: 100 / 100