답안 #734680

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
734680	2023-05-02T19:41:56 Z	Abrar_Al_Samit	구슬과 끈 (APIO14_beads)	C++17	28 / 100	1000 ms	6740 KB

beads

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


const int nax = 200005;

vector<pair<int,int>>g[nax];

int dp[nax][2], n;

int solve(int v, int topar, int p = -1) {
	int &ret = dp[v][(topar>0)];
	if(ret!=-1) return ret;

	ret = 0;
	int base = 0;
	for(auto [u, w] : g[v]) if(u!=p) {
		base += solve(u, w, v);
	}

	ret = base;

	if(topar) {
		for(auto [u, w] : g[v]) if(u!=p) {
			int cur = base - solve(u, w, v) + solve(u, 0, v) + topar + w;
			ret = max(ret, cur);
		}
	}
	return ret;
}
void PlayGround() {
	cin>>n;
	for(int i=1; i<n; ++i) {
		int u, v, w;
		cin>>u>>v>>w;
		g[u].emplace_back(v, w);
		g[v].emplace_back(u, w);
	}	

	int ans = 0;
	for(int i=1; i<=n; ++i) {
		memset(dp, -1, sizeof dp);
		ans = max(ans, solve(i, 0));
	}
	cout<<ans<<'\n';

	// cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	PlayGround();
	return 0;
}

Subtask #1

13.0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	6484 KB	Output is correct
2	Correct	3 ms	6484 KB	Output is correct
3	Correct	3 ms	6484 KB	Output is correct
4	Correct	4 ms	6484 KB	Output is correct
5	Correct	3 ms	6484 KB	Output is correct
6	Correct	4 ms	6484 KB	Output is correct
7	Correct	4 ms	6564 KB	Output is correct
8	Correct	4 ms	6484 KB	Output is correct
9	Correct	4 ms	6484 KB	Output is correct
10	Correct	5 ms	6484 KB	Output is correct
11	Correct	5 ms	6484 KB	Output is correct
12	Correct	4 ms	6484 KB	Output is correct

Subtask #2

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	6484 KB	Output is correct
2	Correct	3 ms	6484 KB	Output is correct
3	Correct	3 ms	6484 KB	Output is correct
4	Correct	4 ms	6484 KB	Output is correct
5	Correct	3 ms	6484 KB	Output is correct
6	Correct	4 ms	6484 KB	Output is correct
7	Correct	4 ms	6564 KB	Output is correct
8	Correct	4 ms	6484 KB	Output is correct
9	Correct	4 ms	6484 KB	Output is correct
10	Correct	5 ms	6484 KB	Output is correct
11	Correct	5 ms	6484 KB	Output is correct
12	Correct	4 ms	6484 KB	Output is correct
13	Correct	8 ms	6480 KB	Output is correct
14	Correct	7 ms	6484 KB	Output is correct
15	Correct	8 ms	6556 KB	Output is correct
16	Correct	12 ms	6556 KB	Output is correct
17	Correct	12 ms	6484 KB	Output is correct
18	Correct	14 ms	6560 KB	Output is correct
19	Correct	12 ms	6484 KB	Output is correct
20	Correct	13 ms	6612 KB	Output is correct
21	Correct	18 ms	6560 KB	Output is correct
22	Correct	17 ms	6556 KB	Output is correct

Subtask #3

0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	6484 KB	Output is correct
2	Correct	3 ms	6484 KB	Output is correct
3	Correct	3 ms	6484 KB	Output is correct
4	Correct	4 ms	6484 KB	Output is correct
5	Correct	3 ms	6484 KB	Output is correct
6	Correct	4 ms	6484 KB	Output is correct
7	Correct	4 ms	6564 KB	Output is correct
8	Correct	4 ms	6484 KB	Output is correct
9	Correct	4 ms	6484 KB	Output is correct
10	Correct	5 ms	6484 KB	Output is correct
11	Correct	5 ms	6484 KB	Output is correct
12	Correct	4 ms	6484 KB	Output is correct
13	Correct	8 ms	6480 KB	Output is correct
14	Correct	7 ms	6484 KB	Output is correct
15	Correct	8 ms	6556 KB	Output is correct
16	Correct	12 ms	6556 KB	Output is correct
17	Correct	12 ms	6484 KB	Output is correct
18	Correct	14 ms	6560 KB	Output is correct
19	Correct	12 ms	6484 KB	Output is correct
20	Correct	13 ms	6612 KB	Output is correct
21	Correct	18 ms	6560 KB	Output is correct
22	Correct	17 ms	6556 KB	Output is correct
23	Execution timed out	1078 ms	6740 KB	Time limit exceeded
24	Halted	0 ms	0 KB	-

Subtask #4

0 / 43.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	6484 KB	Output is correct
2	Correct	3 ms	6484 KB	Output is correct
3	Correct	3 ms	6484 KB	Output is correct
4	Correct	4 ms	6484 KB	Output is correct
5	Correct	3 ms	6484 KB	Output is correct
6	Correct	4 ms	6484 KB	Output is correct
7	Correct	4 ms	6564 KB	Output is correct
8	Correct	4 ms	6484 KB	Output is correct
9	Correct	4 ms	6484 KB	Output is correct
10	Correct	5 ms	6484 KB	Output is correct
11	Correct	5 ms	6484 KB	Output is correct
12	Correct	4 ms	6484 KB	Output is correct
13	Correct	8 ms	6480 KB	Output is correct
14	Correct	7 ms	6484 KB	Output is correct
15	Correct	8 ms	6556 KB	Output is correct
16	Correct	12 ms	6556 KB	Output is correct
17	Correct	12 ms	6484 KB	Output is correct
18	Correct	14 ms	6560 KB	Output is correct
19	Correct	12 ms	6484 KB	Output is correct
20	Correct	13 ms	6612 KB	Output is correct
21	Correct	18 ms	6560 KB	Output is correct
22	Correct	17 ms	6556 KB	Output is correct
23	Execution timed out	1078 ms	6740 KB	Time limit exceeded
24	Halted	0 ms	0 KB	-