Submission #103668

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
103668	2019-04-01T23:29:53 Z	Anai	Match (CEOI16_match)	C++14	100 / 100	18 ms	11776 KB

match

#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5, S = 26;


char str[N], ant[N];
int dp[S][N];

int n;

static void solve(int l, int r) {
	if (l > r)
		return;
	int match = dp[str[l] - 'a'][r];

	if (!match)
		throw -1;

	ant[l] = '(';
	ant[match] = ')';

	solve(l + 1, match - 1);
	solve(match + 1, r); }

int main() {
#ifdef HOME
	freopen("match.in", "r", stdin);
	freopen("match.out", "w", stdout);
#endif
	ios::sync_with_stdio(false);
	cin.tie(0), cout.tie(0);
	vector<int> stk;
	stk.reserve(N);

	cin >> (str + 1);
	n = strlen(str + 1);

	for (int i = 1; i <= n; ++i) {
		dp[str[i] - 'a'][i] = i;
		if (i == 1)
			continue;

		int pos = dp[str[i] - 'a'][i - 1];
		if (pos <= 1)
			continue;

		for (int ch = 0; ch < S; ++ch) {
			if (str[i] != ch + 'a')
				dp[ch][i] = dp[ch][pos - 1]; } }

	try {
		solve(1, n); }
	catch (int e) {
		cout << "-1\n";
		return 0; }

	cout << (ant + 1) << endl;

	return 0; }

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	512 KB	Output is correct
2	Correct	2 ms	512 KB	Output is correct
3	Correct	4 ms	512 KB	Output is correct

Subtask #2

27.0 / 27.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	512 KB	Output is correct
2	Correct	2 ms	512 KB	Output is correct
3	Correct	4 ms	512 KB	Output is correct
4	Correct	2 ms	512 KB	Output is correct
5	Correct	2 ms	640 KB	Output is correct
6	Correct	2 ms	640 KB	Output is correct
7	Correct	2 ms	640 KB	Output is correct

Subtask #3

63.0 / 63.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	512 KB	Output is correct
2	Correct	2 ms	512 KB	Output is correct
3	Correct	4 ms	512 KB	Output is correct
4	Correct	2 ms	512 KB	Output is correct
5	Correct	2 ms	640 KB	Output is correct
6	Correct	2 ms	640 KB	Output is correct
7	Correct	2 ms	640 KB	Output is correct
8	Correct	3 ms	1152 KB	Output is correct
9	Correct	4 ms	1280 KB	Output is correct
10	Correct	3 ms	1280 KB	Output is correct
11	Correct	3 ms	1280 KB	Output is correct
12	Correct	10 ms	7296 KB	Output is correct
13	Correct	12 ms	7852 KB	Output is correct
14	Correct	12 ms	8576 KB	Output is correct
15	Correct	12 ms	9984 KB	Output is correct
16	Correct	13 ms	9984 KB	Output is correct
17	Correct	16 ms	10496 KB	Output is correct
18	Correct	13 ms	10368 KB	Output is correct
19	Correct	18 ms	11136 KB	Output is correct
20	Correct	14 ms	7472 KB	Output is correct
21	Correct	17 ms	11776 KB	Output is correct