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Submission #543069

# Submission time Handle Problem Language Result Execution time Memory
543069 2022-03-29T04:37:44 Z skittles1412 Cat in a tree (BOI17_catinatree) C++17
100 / 100
 76 ms 17196 KB 
#include "bits/extc++.h"

using namespace std;

template <typename T>
void dbgh(const T& t) {
	cerr << t << endl;
}

template <typename T, typename... U>
void dbgh(const T& t, const U&... u) {
	cerr << t << " | ";
	dbgh(u...);
}

#ifdef DEBUG
#define dbg(...)                                           \
	cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]" \
		 << ": ";                                          \
	dbgh(__VA_ARGS__)
#else
#define cerr   \
	if (false) \
	cerr
#define dbg(...)
#endif

#define endl "\n"
#define long int64_t
#define sz(x) int((x).size())

const int maxn = 2e5 + 5;

int d;
vector<int> graph[maxn];

pair<int, int> dfs(int u) {
	if (!sz(graph[u])) {
		return {1, 0};
	}
	vector<pair<int, int>> ch;
	for (auto& v : graph[u]) {
		auto x = dfs(v);
		x.second++;
		ch.push_back(x);
	}
	sort(begin(ch), end(ch), [&](const auto &a, const auto &b) -> bool {
		return a.second > b.second;
	});
	int ans = 0, mn = 1e9;
	for (auto& [x, dist] : ch) {
		ans += x - 1;
		if (dist + mn >= d) {
			ans++;
			mn = dist;
		}
	}
	if (mn >= d) {
		ans++;
		mn = 0;
	}
	return {ans, mn};
}

void solve() {
	int n;
	cin >> n >> d;
	for (int i = 1; i < n; i++) {
		int x;
		cin >> x;
		graph[x].push_back(i);
	}
	cout << dfs(0).first << endl;
}

int main() {
	cin.tie(nullptr);
	ios_base::sync_with_stdio(false);
	cin.exceptions(ios::failbit);
	solve();
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5020 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 3 ms 5016 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 5024 KB Output is correct
18 Correct 3 ms 5020 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5020 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 3 ms 5016 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 5024 KB Output is correct
18 Correct 3 ms 5020 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct
21 Correct 3 ms 5152 KB Output is correct
22 Correct 3 ms 5016 KB Output is correct
23 Correct 4 ms 5020 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 4 ms 5020 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 3 ms 4948 KB Output is correct
29 Correct 4 ms 4948 KB Output is correct
30 Correct 3 ms 4948 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 3 ms 5024 KB Output is correct
33 Correct 3 ms 4948 KB Output is correct
34 Correct 3 ms 4948 KB Output is correct
35 Correct 5 ms 4948 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 3 ms 4948 KB Output is correct
39 Correct 3 ms 5076 KB Output is correct
40 Correct 5 ms 5076 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5020 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 3 ms 5016 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 5024 KB Output is correct
18 Correct 3 ms 5020 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct
21 Correct 3 ms 5152 KB Output is correct
22 Correct 3 ms 5016 KB Output is correct
23 Correct 4 ms 5020 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 4 ms 5020 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 3 ms 4948 KB Output is correct
29 Correct 4 ms 4948 KB Output is correct
30 Correct 3 ms 4948 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 3 ms 5024 KB Output is correct
33 Correct 3 ms 4948 KB Output is correct
34 Correct 3 ms 4948 KB Output is correct
35 Correct 5 ms 4948 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 3 ms 4948 KB Output is correct
39 Correct 3 ms 5076 KB Output is correct
40 Correct 5 ms 5076 KB Output is correct
41 Correct 40 ms 10532 KB Output is correct
42 Correct 26 ms 7124 KB Output is correct
43 Correct 31 ms 7148 KB Output is correct
44 Correct 30 ms 7124 KB Output is correct
45 Correct 38 ms 7132 KB Output is correct
46 Correct 54 ms 9292 KB Output is correct
47 Correct 54 ms 9404 KB Output is correct
48 Correct 76 ms 9292 KB Output is correct
49 Correct 72 ms 9304 KB Output is correct
50 Correct 13 ms 5972 KB Output is correct
51 Correct 14 ms 5980 KB Output is correct
52 Correct 14 ms 5924 KB Output is correct
53 Correct 22 ms 6868 KB Output is correct
54 Correct 31 ms 6904 KB Output is correct
55 Correct 37 ms 6808 KB Output is correct
56 Correct 3 ms 5028 KB Output is correct
57 Correct 8 ms 7252 KB Output is correct
58 Correct 29 ms 15340 KB Output is correct
59 Correct 54 ms 17196 KB Output is correct
60 Correct 41 ms 10952 KB Output is correct
61 Correct 52 ms 10068 KB Output is correct