Submission #381018

#	Time	Username	Problem	Language	Result	Execution time	Memory
381018		BlancaHM	Painting Squares (IOI20_squares)	C++14	0 / 100	134 ms	788 KiB

squares

#include <iostream>
#include <vector>
#include <map>
using namespace std;

map<string, int> used;
vector<int> squares = {4};

vector<int> paint(int n) {
	squares = vector<int>(n+1);
	squares[n] = 10;
	string window = "1111111111";
	used.clear();
	for (int i = 0; i < 10; i++) {
		if (i == n)
			break;
		squares[i] = 1;
	}
	used[window] = 0;
	for (int i = 10; i < n; i++) {
		window.erase(0, 1);
		window.push_back('0');
		if (used.find(window) == used.end())
			squares[i] = 0;
		else {
			squares[i] = 1;
			window[9] = '1';
		}
		used[window] = i - 9;
	}
	return squares;
}

int find_location(int n, vector<int> c) {
	if (c[9] == -1) {
		int num = -1;
		while(num < 9 && c[num+1] != -1)
			num++;
		return n - num;
	}
	if (squares[0] == 4)
		squares = paint(n);
	string s = "";
	for (int i = 0; i < 10; i++) {
		if (c[i] == 0) s += "0";
		else s += "1";
	}
	return used[s]+1;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55