Submission #250251

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
250251	2020-07-17T10:15:51 Z	tutis	File Paths (BOI15_fil)	C++17	33 / 100	1000 ms	20472 KB

fil

/*input
2 4 22
2
0 1
1 5
2 13
2 10
1 4
0 7

*/
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
int main()
{
	ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0), cerr.tie(0);
	int n, m, k, s;
	cin >> n >> m >> k >> s;
	s++;
	int p[n + 1], d[n + 1], l[n + 1];
	p[0] = -1;
	d[0] = 1;
	for (int i = 1; i <= n; i++)
	{
		cin >> p[i] >> l[i];
		d[i] = d[p[i]] + 1 + l[i];
	}
	vector<int>cikl[n + 1];
	for (int i = 0; i <= n; i++)
	{
		for (int j = i; j != -1; j = p[j])
		{
			cikl[j].push_back(d[i] - d[j] + s);
		}
	}
	function<bool(int, int)>ok = [&](int v, int ilg)
	{
		if (d[v] == ilg)
			return true;
		if (ilg <= 0)
			return false;
		if (v != 0 && ok(p[v], ilg - 1 - l[v]))
			return true;
		for (int w = 0; w <= n; w++)
		{
			//w->v
			if (d[w] + s == ilg)
				return true;
		}
		if (ilg <= d[v])
			return false;
		for (int x : cikl[v])
		{
			if ((ilg - d[v]) % x == 0)
				return true;
		}
		return false;
	};
	while (m--)
	{
		int p, l;
		cin >> p >> l;
		if (ok(p, k - l))
			cout << "YES\n";
		else
			cout << "NO\n";
	}
}

Subtask #1

33.0 / 33.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	384 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	2 ms	384 KB	Output is correct
4	Correct	81 ms	808 KB	Output is correct
5	Correct	12 ms	524 KB	Output is correct
6	Correct	3 ms	384 KB	Output is correct
7	Correct	145 ms	1040 KB	Output is correct
8	Correct	2 ms	384 KB	Output is correct
9	Correct	2 ms	384 KB	Output is correct
10	Correct	1 ms	512 KB	Output is correct
11	Correct	2 ms	384 KB	Output is correct
12	Correct	57 ms	868 KB	Output is correct

Subtask #2

0 / 33.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	50 ms	672 KB	Output is correct
2	Correct	46 ms	640 KB	Output is correct
3	Correct	46 ms	640 KB	Output is correct
4	Correct	49 ms	640 KB	Output is correct
5	Execution timed out	1094 ms	20472 KB	Time limit exceeded
6	Halted	0 ms	0 KB	-

Subtask #3

0 / 34.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	384 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	2 ms	384 KB	Output is correct
4	Correct	81 ms	808 KB	Output is correct
5	Correct	12 ms	524 KB	Output is correct
6	Correct	3 ms	384 KB	Output is correct
7	Correct	145 ms	1040 KB	Output is correct
8	Correct	2 ms	384 KB	Output is correct
9	Correct	2 ms	384 KB	Output is correct
10	Correct	1 ms	512 KB	Output is correct
11	Correct	2 ms	384 KB	Output is correct
12	Correct	57 ms	868 KB	Output is correct
13	Correct	50 ms	672 KB	Output is correct
14	Correct	46 ms	640 KB	Output is correct
15	Correct	46 ms	640 KB	Output is correct
16	Correct	49 ms	640 KB	Output is correct
17	Execution timed out	1094 ms	20472 KB	Time limit exceeded
18	Halted	0 ms	0 KB	-