Submission #1244730

#	Time	Username	Problem	Language	Result	Execution time	Memory
1244730		Nurislam	Cave (IOI13_cave)	C++20	100 / 100	171 ms	572 KiB

cave

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

using namespace std;
int a[50000], us[50000];
int ans1[50000], ans2[50000];

void exploreCave(int n) {
	//cout << n << '\n';
	
	auto fp = [&](int l, int r) {
		for(int i = l; i <= r; i ++ ) {
			if(us[i])continue;
			a[i] ^= 1;
		};
	};
	
	int t = 0;
	function<void(int,int)> f = [&](int l, int r) {
		//cout << l << ' ' << r << '\n';
		
		//for(int j = 0; j < n; j ++ ) cout << a[j] << ' ';
		//cout << '\n';
		if(l == r) {
			//cout << ": " << t << ' ' << a[l] << '\n';
			ans1[l] = a[l];
			us[l] = 1;
			ans2[l] = t++;
			return;
		};
		
		int m = (l + r) >> 1;
		
		fp(l, m);
		
		if(tryCombination(a) == t) {
			fp(l,m);
			f(l,m);
			return;
		};
		f(m+1, r);
	};
	
	
	for(int i = 0; i < n; i ++ ) {
		int x = tryCombination(a);
		//cout << a[0] << ' '<< a[1] << ' ' << a[2] << ' ' << a[3] << '\n';
		//cout << x << '\n';
		if(x == t) fp(0,n-1);
		
		f(0, n-1);
		//for(int j = 0; j < n; j ++ ) cout << a[j] << ' ';
		//cout << '\n';
	};
	
	//for(int i : ans1) cout << i << '\n';
	
	//cout << 1 << '\n';
	
	answer(ans1, ans2);
}

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