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Submission #647028

# Submission time Handle Problem Language Result Execution time Memory
647028 2022-10-01T12:26:45 Z georgievskiy parentrises (BOI18_parentrises) C++17
50 / 100
 21 ms 5312 KB 
#include <bits/stdc++.h>
using namespace std;

bool check(string s, string a) {
	int b0 = 0, b1 = 0;
	for (int i = 0; i < s.size(); i++) {
		if (a[i] != 'B')
			b0 += (s[i] == '(') ? +1 : -1;
		if (a[i] != 'R')
			b1 += (s[i] == '(') ? +1 : -1;
		if (b0 < 0 || b1 < 0)
			return 0;
	}
	return b0 == 0 && b1 == 0;
}

void solve1() {
	string s;
	cin >> s;
	int n = s.size();
	string a(n, 'G');
	int b0 = 0, b1 = 0;
	for (int i = 0; i < n; i++) {
		if (s[i] == '(') {
			a[i] = 'G';
			b0++, b1++;
		} else {
			if (b0 >= b1) {
				a[i] = 'R';
				b0--;
			} else {
				a[i] = 'B';
				b1--;
			}
		}

		if (b0 < 0 || b1 < 0) {
			cout << "impossible\n";
			return;
		}
	}

	for (int i = n - 1; i >= 0 && (b0 > 0 || b1 > 0); i--) {
		if (s[i] == '(') {
			if (b0 >= b1)
				a[i] = 'B', b0--;
			else
				a[i] = 'R', b1--;
		} else {
			if (b0 > 0 && a[i] == 'B')
				a[i] = 'G', b0--;
			else if (b1 > 0 && a[i] == 'R')
				a[i] = 'G', b1--;
		}
		assert(b0 >= 0 && b1 >= 0);
	}

	if (check(s, a))
		cout << a << "\n";
	else
		cout << "impossible\n";
}

void solve2() {}

int main() {
	 ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	int p, t;
	cin >> p >> t;
	while (t--) {
		if (p == 1)
			solve1();
		else
			solve2();
	}
	return 0;
}

Compilation message

parentrises.cpp: In function 'bool check(std::string, std::string)':
parentrises.cpp:6:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |  for (int i = 0; i < s.size(); i++) {
      |                  ~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 3 ms 812 KB Output is correct
18 Correct 2 ms 424 KB Output is correct
19 Correct 2 ms 724 KB Output is correct
20 Correct 3 ms 784 KB Output is correct
21 Correct 18 ms 2100 KB Output is correct
22 Correct 20 ms 5224 KB Output is correct
23 Correct 12 ms 2432 KB Output is correct
24 Correct 18 ms 3096 KB Output is correct
25 Correct 21 ms 5312 KB Output is correct

Subtask #5
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #6
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -