Submission #428280

#	Time	Username	Problem	Language	Result	Execution time	Memory
428280		Azimjon	Paint By Numbers (IOI16_paint)	C++17	7 / 100	1 ms	304 KiB

paint

#include "paint.h"

#include <bits/stdc++.h>

using namespace std;

string solve(string s, vector<int> c) {
	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';
				}
				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;

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

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

	swap(a, b);

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

	int i, j;
	i = j = 0;

	while (i < n && a[i] != 'X')
		i++;
	while (j < n && b[j] != 'X')
		j++;

	vector<int> aa, bb;
	aa = bb = vector<int>(n, -1);

	for (int q = 0; q < (int)c.size(); q++) {
		while (i < n && a[i] == 'X') {
			aa[i] = q;
			i++;
		}
		while (j < n && b[j] == 'X') {
			bb[j] = q;
			j++;
		}
		i++;
		j++;
	}
	vector<int> q(n, -1);
	for (int i = 0; i < n; i++) {
		q[i] = (aa[i] == -1 ? bb[i] : aa[i]);
		if (s[i] == '_') continue;
		if (aa[i] == bb[i] && a[i] == 'X') {
			s[i] = 'X';
		}
	}
	string t = s;
	for (int i = 0; i < n; i++) {
		if (s[i] != '.') continue;
		if (a[i] == 'X' || b[i] == 'X') {
			t[i] = '?';
			continue;
		}
		int l, r;
		l = r = i;
		if (s[i] == '.') {
			while (l >= 0 && aa[l] == -1) {
				if (s[l] != '.') break;
				l--;
			}
			while (r < n && bb[r] == -1) {
				if (s[r] != '.') break;
				r++;
			}
		}
		if (q[l] == q[r] && q[l] != -1) {
			t[i] = '?';
		}
	}

	// for (int i = 0; i < n; i++)
	// 	cout << aa[i] << " ";
	// cout << endl;
	// for (int i = 0; i < n; i++)
	// 	cout << bb[i] << " ";
	// cout << endl;
	// for (int i : q)
	// 	cout << i << " ";
	// cout << endl;

	return t;
}

• 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