Submission #428028

#	Time	Username	Problem	Language	Result	Execution time	Memory
428028		Azimjon	Paint By Numbers (IOI16_paint)	C++17	7 / 100	1 ms	300 KiB

paint

#include "paint.h"

#include <bits/stdc++.h>

using namespace std;

string solve(string s, vector<int> c, vector<int> &bid) {
	int lst = 0;
	for (int k = 0; k < (int)c.size(); k++) {
		bool flag;
		int x = c[k];
		do {
			flag = true;
			for (int i = lst; i < lst + x; i++) {
				// cerr << i << " " << endl;
				flag &= (s[i] == '.');
			}

			if (flag) {
				for (int i = lst; i < lst + x; i++) {
					s[i] = 'X';
					bid[i] = k;
				}
				lst += x;
			} else {
				lst++;
			}

		} while (!flag);
		lst++;
	}

	return s;
}

std::string solve_puzzle(std::string s, std::vector<int> c) {
	int n = s.size();
	string a, b;
	vector<int> aa, bb;
	aa = bb = vector<int>(n, -1);

	reverse(s.begin(), s.end());
	reverse(c.begin(), c.end());
	a = solve(s, c, aa);
	reverse(a.begin(), a.end());
	reverse(aa.begin(), aa.end());

	for (int &i : aa) {
		i = c.size() - i - 1;
	}

	reverse(s.begin(), s.end());
	reverse(c.begin(), c.end());
	b = solve(s, c, bb);

	cerr << a << endl;
	cerr << b << endl;

	for (int i = 0; i < (int)n; i++) {
		if (a[i] == 'X' && b[i] == 'X' && aa[i] == bb[i]) {
			s[i] = 'X';
		} else if (a[i] == 'X' || b[i] == 'X') {
			s[i] = '?';
		} else if (s[i] == '.') {
			int u, v;
			u = v = i;
			while (u >= 0 && aa[u] == -1)
				u--;

			while (v < n && bb[v] == -1)
				v++;

			if (u == -1 || v == n || (aa[u] == bb[v])) {
				s[i] = '?';
			}
		}
	}

	return s;
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 3
• Subtask 3: 0 / 22
• Subtask 4: 0 / 27
• Subtask 5: 0 / 21
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10