Submission #283316

#	Time	Username	Problem	Language	Result	Execution time	Memory
283316		sofapuden	Cave (IOI13_cave)	C++14	100 / 100	278 ms	632 KiB

cave

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

using namespace std;

void exploreCave(int N) {
    int v[N] = {0};
    vector<pair<int,int>> known(N,{-1,-1});
    for(int i = 1; i <= N; ++i){
		int lo = 0, hi = N-1;
		int x = tryCombination(v);
		if(x == -1)x = N;
		x = min(x, i);
		while(lo < hi){
			int mid = (lo+hi)/2;
			for(int j = lo; j <= mid; ++j){
				v[j] = (known[j].second != -1 ? known[j].first : v[j]^1);
			}
			int x2 = tryCombination(v);
			if(x2 == -1)x2 = i;
			x2 = min(x2, i);
			if(x == x2){
				lo = mid+1;
			}
			else hi = mid;
			x = x2;
		}
		known[lo] = {x == i ? v[lo] : v[lo]^1, i-1};
		v[lo] = known[lo].first;
	}
	int out1[N], out2[N];
	for(int i = 0; i < N; ++i){
		out1[i] = known[i].first;
		out2[i] = known[i].second;
	}
	answer(out1, out2);
				
}

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