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답안 #355556

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
355556 2021-01-22T17:19:28 Z Lam_lai_cuoc_doi Power Plant (JOI20_power) C++17
47 / 100
 5 ms 5228 KB 
#include <iostream>
#include <cstdio>
#include <vector>
#define task ""
using namespace std;
using ll = long long;
using ld = long double;

const int N = 1e5 + 2;
const int Inf = 1e9 + 7;
vector<int> adj[N];
int n, dp[N][2], root;
bool vis[N];
string s;

void Read()
{
    cin >> n;
    for (int i = 1; i < n; ++i)
    {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    cin >> s;
    s = " " + s;
}

void dfs(int v)
{
    dp[v][0] = dp[v][1] = s[v] - '0';
    int sum(0);
    for (auto i : adj[v])
        if (dp[i][0] == -Inf)
        {
            dfs(i);
            sum += dp[i][1];
            dp[v][0] = max(dp[v][0], dp[i][0]);
            if (s[v] == '1')
                dp[v][0] = max(dp[v][0], dp[i][1] + (s[v] - '0'));
        }
    dp[v][1] = max(dp[v][1], sum - (s[v] - '0'));
    dp[v][0] = max(dp[v][0], sum - (s[v] - '0'));
}

int GetAns(int v)
{
    fill_n(&dp[0][0], N * 2, -Inf);
    root = v;
    dfs(v);
    return dp[v][0];
}

void Solve()
{
    cout << GetAns(1);
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen(task ".INP", "r"))
    {
        freopen(task ".INP", "r", stdin);
        freopen(task ".OUT", "w", stdout);
    }
    Read();
    Solve();
}

Compilation message

power.cpp: In function 'int32_t main()':
power.cpp:67:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   67 |         freopen(task ".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
power.cpp:68:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   68 |         freopen(task ".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 3436 KB Output is correct
2 Correct 2 ms 3436 KB Output is correct
3 Correct 2 ms 3436 KB Output is correct
4 Correct 2 ms 3436 KB Output is correct
5 Correct 3 ms 3436 KB Output is correct
6 Correct 3 ms 3436 KB Output is correct
7 Correct 3 ms 3436 KB Output is correct
8 Correct 3 ms 3436 KB Output is correct
9 Correct 3 ms 3436 KB Output is correct
10 Correct 3 ms 3436 KB Output is correct
11 Correct 3 ms 3436 KB Output is correct
12 Correct 2 ms 3436 KB Output is correct
13 Correct 3 ms 3436 KB Output is correct
14 Correct 3 ms 3436 KB Output is correct
15 Correct 2 ms 3436 KB Output is correct
16 Correct 3 ms 3436 KB Output is correct
17 Correct 3 ms 3436 KB Output is correct
18 Correct 3 ms 3456 KB Output is correct
19 Correct 3 ms 3436 KB Output is correct
20 Correct 3 ms 3436 KB Output is correct
21 Correct 2 ms 3436 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 3436 KB Output is correct
2 Correct 2 ms 3436 KB Output is correct
3 Correct 2 ms 3436 KB Output is correct
4 Correct 2 ms 3436 KB Output is correct
5 Correct 3 ms 3436 KB Output is correct
6 Correct 3 ms 3436 KB Output is correct
7 Correct 3 ms 3436 KB Output is correct
8 Correct 3 ms 3436 KB Output is correct
9 Correct 3 ms 3436 KB Output is correct
10 Correct 3 ms 3436 KB Output is correct
11 Correct 3 ms 3436 KB Output is correct
12 Correct 2 ms 3436 KB Output is correct
13 Correct 3 ms 3436 KB Output is correct
14 Correct 3 ms 3436 KB Output is correct
15 Correct 2 ms 3436 KB Output is correct
16 Correct 3 ms 3436 KB Output is correct
17 Correct 3 ms 3436 KB Output is correct
18 Correct 3 ms 3456 KB Output is correct
19 Correct 3 ms 3436 KB Output is correct
20 Correct 3 ms 3436 KB Output is correct
21 Correct 2 ms 3436 KB Output is correct
22 Correct 3 ms 3564 KB Output is correct
23 Correct 3 ms 3564 KB Output is correct
24 Correct 4 ms 3564 KB Output is correct
25 Correct 3 ms 3564 KB Output is correct
26 Correct 3 ms 3564 KB Output is correct
27 Correct 3 ms 3564 KB Output is correct
28 Correct 4 ms 3564 KB Output is correct
29 Correct 4 ms 3692 KB Output is correct
30 Correct 4 ms 3564 KB Output is correct
31 Correct 3 ms 3564 KB Output is correct
32 Correct 4 ms 3564 KB Output is correct
33 Correct 4 ms 3564 KB Output is correct
34 Correct 3 ms 3564 KB Output is correct
35 Correct 3 ms 3564 KB Output is correct
36 Correct 3 ms 3564 KB Output is correct
37 Correct 3 ms 3564 KB Output is correct
38 Correct 3 ms 3564 KB Output is correct
39 Correct 3 ms 3564 KB Output is correct
40 Correct 3 ms 3564 KB Output is correct
41 Correct 3 ms 3564 KB Output is correct
42 Correct 4 ms 3564 KB Output is correct
43 Correct 4 ms 3564 KB Output is correct
44 Correct 3 ms 3564 KB Output is correct
45 Correct 3 ms 3564 KB Output is correct
46 Correct 3 ms 3564 KB Output is correct
47 Correct 4 ms 3636 KB Output is correct
48 Correct 3 ms 3712 KB Output is correct
49 Correct 3 ms 3564 KB Output is correct
50 Correct 3 ms 3564 KB Output is correct
51 Correct 3 ms 3564 KB Output is correct
52 Correct 3 ms 3564 KB Output is correct
53 Correct 3 ms 3564 KB Output is correct
54 Correct 3 ms 3564 KB Output is correct
55 Correct 3 ms 3564 KB Output is correct
56 Correct 3 ms 3584 KB Output is correct
57 Correct 3 ms 3692 KB Output is correct
58 Correct 3 ms 3564 KB Output is correct
59 Correct 3 ms 3564 KB Output is correct
60 Correct 4 ms 3564 KB Output is correct
61 Correct 3 ms 3564 KB Output is correct
62 Correct 4 ms 3692 KB Output is correct
63 Correct 4 ms 3564 KB Output is correct

Subtask #3
0.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 3436 KB Output is correct
2 Correct 2 ms 3436 KB Output is correct
3 Correct 2 ms 3436 KB Output is correct
4 Correct 2 ms 3436 KB Output is correct
5 Correct 3 ms 3436 KB Output is correct
6 Correct 3 ms 3436 KB Output is correct
7 Correct 3 ms 3436 KB Output is correct
8 Correct 3 ms 3436 KB Output is correct
9 Correct 3 ms 3436 KB Output is correct
10 Correct 3 ms 3436 KB Output is correct
11 Correct 3 ms 3436 KB Output is correct
12 Correct 2 ms 3436 KB Output is correct
13 Correct 3 ms 3436 KB Output is correct
14 Correct 3 ms 3436 KB Output is correct
15 Correct 2 ms 3436 KB Output is correct
16 Correct 3 ms 3436 KB Output is correct
17 Correct 3 ms 3436 KB Output is correct
18 Correct 3 ms 3456 KB Output is correct
19 Correct 3 ms 3436 KB Output is correct
20 Correct 3 ms 3436 KB Output is correct
21 Correct 2 ms 3436 KB Output is correct
22 Correct 3 ms 3564 KB Output is correct
23 Correct 3 ms 3564 KB Output is correct
24 Correct 4 ms 3564 KB Output is correct
25 Correct 3 ms 3564 KB Output is correct
26 Correct 3 ms 3564 KB Output is correct
27 Correct 3 ms 3564 KB Output is correct
28 Correct 4 ms 3564 KB Output is correct
29 Correct 4 ms 3692 KB Output is correct
30 Correct 4 ms 3564 KB Output is correct
31 Correct 3 ms 3564 KB Output is correct
32 Correct 4 ms 3564 KB Output is correct
33 Correct 4 ms 3564 KB Output is correct
34 Correct 3 ms 3564 KB Output is correct
35 Correct 3 ms 3564 KB Output is correct
36 Correct 3 ms 3564 KB Output is correct
37 Correct 3 ms 3564 KB Output is correct
38 Correct 3 ms 3564 KB Output is correct
39 Correct 3 ms 3564 KB Output is correct
40 Correct 3 ms 3564 KB Output is correct
41 Correct 3 ms 3564 KB Output is correct
42 Correct 4 ms 3564 KB Output is correct
43 Correct 4 ms 3564 KB Output is correct
44 Correct 3 ms 3564 KB Output is correct
45 Correct 3 ms 3564 KB Output is correct
46 Correct 3 ms 3564 KB Output is correct
47 Correct 4 ms 3636 KB Output is correct
48 Correct 3 ms 3712 KB Output is correct
49 Correct 3 ms 3564 KB Output is correct
50 Correct 3 ms 3564 KB Output is correct
51 Correct 3 ms 3564 KB Output is correct
52 Correct 3 ms 3564 KB Output is correct
53 Correct 3 ms 3564 KB Output is correct
54 Correct 3 ms 3564 KB Output is correct
55 Correct 3 ms 3564 KB Output is correct
56 Correct 3 ms 3584 KB Output is correct
57 Correct 3 ms 3692 KB Output is correct
58 Correct 3 ms 3564 KB Output is correct
59 Correct 3 ms 3564 KB Output is correct
60 Correct 4 ms 3564 KB Output is correct
61 Correct 3 ms 3564 KB Output is correct
62 Correct 4 ms 3692 KB Output is correct
63 Correct 4 ms 3564 KB Output is correct
64 Runtime error 5 ms 5228 KB Execution killed with signal 11
65 Halted 0 ms 0 KB -