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답안 #198231

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
198231 2020-01-25T07:30:56 Z parsa_mobed 구슬과 끈 (APIO14_beads) C++14
28 / 100
 1000 ms 3064 KB 
#include <bits/stdc++.h>

using namespace std;
#define pii pair <int , int>
#define F first
#define S second
const int N = 1e5 + 10, inf = 1e9 + 5;
int dp[N][2];
vector <pii> g[N];

void dfs(int v, int p = 0)
{
    int sum = 0;
    for (pii u : g[v]) if (u.F != p) {
        dfs(u.F, v);
        sum += max(dp[u.F][1] + u.S, dp[u.F][0]);
    }
    dp[v][0] = sum;
    for (pii u : g[v]) if (u.F != p)
        dp[v][1] = max(dp[v][1], sum - max(dp[u.F][1] + u.S, dp[u.F][0]) + dp[u.F][0] + u.S);
}

int main()
{
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int n; cin >> n;
    for (int i = 0; i < n - 1; i++) {
        int u, v, w; cin >> u >> v >> w;
        g[u].push_back({v, w});
        g[v].push_back({u, w});
    }
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        for (int i = 1; i <= n; i++) dp[i][0] = dp[i][1] = -inf;
        dfs(i);
        ans = max(ans, dp[i][0]);
    }
    cout << ans << "\n";
}

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2808 KB Output is correct
2 Correct 4 ms 2680 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 3 ms 2680 KB Output is correct
5 Correct 5 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 4 ms 2680 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2808 KB Output is correct
2 Correct 4 ms 2680 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 3 ms 2680 KB Output is correct
5 Correct 5 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 4 ms 2680 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Correct 5 ms 2680 KB Output is correct
17 Correct 5 ms 2680 KB Output is correct
18 Correct 5 ms 2680 KB Output is correct
19 Correct 5 ms 2680 KB Output is correct
20 Correct 5 ms 2680 KB Output is correct
21 Correct 5 ms 2680 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct

Subtask #3
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2808 KB Output is correct
2 Correct 4 ms 2680 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 3 ms 2680 KB Output is correct
5 Correct 5 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 4 ms 2680 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Correct 5 ms 2680 KB Output is correct
17 Correct 5 ms 2680 KB Output is correct
18 Correct 5 ms 2680 KB Output is correct
19 Correct 5 ms 2680 KB Output is correct
20 Correct 5 ms 2680 KB Output is correct
21 Correct 5 ms 2680 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 983 ms 3036 KB Output is correct
24 Correct 965 ms 3064 KB Output is correct
25 Correct 956 ms 3036 KB Output is correct
26 Execution timed out 1056 ms 3064 KB Time limit exceeded
27 Halted 0 ms 0 KB -

Subtask #4
0 / 43.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2808 KB Output is correct
2 Correct 4 ms 2680 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 3 ms 2680 KB Output is correct
5 Correct 5 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 4 ms 2680 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Correct 5 ms 2680 KB Output is correct
17 Correct 5 ms 2680 KB Output is correct
18 Correct 5 ms 2680 KB Output is correct
19 Correct 5 ms 2680 KB Output is correct
20 Correct 5 ms 2680 KB Output is correct
21 Correct 5 ms 2680 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 983 ms 3036 KB Output is correct
24 Correct 965 ms 3064 KB Output is correct
25 Correct 956 ms 3036 KB Output is correct
26 Execution timed out 1056 ms 3064 KB Time limit exceeded
27 Halted 0 ms 0 KB -