Submission #593383

#	Time	Username	Problem	Language	Result	Execution time	Memory
593383		shezitt	Cave (IOI13_cave)	C++14	0 / 100	555 ms	376 KiB

cave

#include "cave.h"
#include <iostream>
#include <algorithm>
#include <cstring>
#include <set>

using namespace std;

const int mxN = 5e3+5;
bool done[mxN];
int n;

bool open(int q, int i){
	if(q == -1){
		return 1;
	}
	return q > i;
}

int search(int x, int l, int r, int p, int a[]){
	if(l == r){
		return l;
	}
	int mid = (l+r)/2;
	for(int i=0; i<n; ++i){
		if(done[i]){
			continue;
		}
		a[i] = (i >= l && i <= mid ? p : !p);
	}
	if(open(tryCombination(a), x)){
		return search(x, l, mid, p, a);
	} else {
		return search(x, mid+1, r, p, a);
	}
}

void exploreCave(int N) {
	int a[N], b[N];
	n = N;
	for(int i=0; i<N; ++i){
		a[i] = done[i] = 0;
		b[i] = -1;
	}
	for(int i=0; i<N; ++i){
		int p = 0;
		for(int j=0; j<N; ++j){
			if(done[j]){
				continue;
			}
			a[j] = p;
		}
		if(open(tryCombination(a), i)){
			p = !p;
		}
		int aux = search(i, 0, N-1, p, a);
		b[aux] = i;
		a[i] = p;
		done[aux] = 1;
	}
	answer(a, b);
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 30
• Subtask 5: 0 / 24