Submission #380502

#	Time	Username	Problem	Language	Result	Execution time	Memory
380502		pure_mem	Secret (JOI14_secret)	C++14	100 / 100	536 ms	9492 KiB

secret

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

#define X first
#define Y second
#define MP make_pair
#define ll long long

using namespace std;

int q[1001][1001];
bool was[1001][1001];
void Init(int N, int A[]) {
  	stack< pair<int, int> > st;
  	st.push(MP(1, N));
  	while(!st.empty()){
  		int l = st.top().X, r = st.top().Y; st.pop();
  		int m = (l + r) / 2;
  		was[m][m] = 1, q[m][m] = A[m - 1];
  		for(int i = m - 1, j = A[m - 1];i >= l;i--){
  			j = Secret(A[i - 1], j), q[i][m] = j, was[i][m] = 1;	
  		}
  		if(l == r)
  			continue;
  		was[m + 1][m + 1] = 1, q[m + 1][m + 1] = A[m];
  		for(int i = m + 2, j = A[m];i <= r;i++){
  			j = Secret(j, A[i - 1]), q[m + 1][i] = j, was[m + 1][i] = 1;
  		}
  		if(l != r)
  			st.push(MP(l, m)), st.push(MP(m + 1, r));
  	}
  // Secret(0, 1000000000);
}

int Query(int L, int R) {
	L += 1, R += 1;
	if(was[L][R])
		return q[L][R];
	for(int i = L;i < R;i++){
		if(was[L][i] && was[i + 1][R])
			return Secret(q[L][i], q[i + 1][R]);
	}
	return 0;
}

• Subtask 1: 100 / 100