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답안 #355526

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
355526 2021-01-22T16:31:37 Z Lam_lai_cuoc_doi Power Plant (JOI20_power) C++17
47 / 100
 106 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], 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] = s[v] - '0';
    int sum(0);
    for (auto i : adj[v])
        if (dp[i] == -Inf)
        {
            dfs(i);
            sum += dp[i];
            if (v == root)
                dp[v] = max(dp[v], dp[i] + 1);
        }
    dp[v] = max(dp[v], sum - (s[v] - '0'));
}

int GetAns(int v)
{
    fill(dp, dp + n + 1, -Inf);
    root = v;
    dfs(v);
    return dp[v];
}

void Solve()
{
    int ans(0);
    for (int i = 1; i <= n; ++i)
        if ((s[i] - '0'))
            ans = max(ans, GetAns(i));
    cout << ans;
}

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:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   69 |         freopen(task ".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
power.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   70 |         freopen(task ".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2668 KB Output is correct
2 Correct 2 ms 2668 KB Output is correct
3 Correct 2 ms 2668 KB Output is correct
4 Correct 2 ms 2668 KB Output is correct
5 Correct 2 ms 2668 KB Output is correct
6 Correct 2 ms 2668 KB Output is correct
7 Correct 2 ms 2668 KB Output is correct
8 Correct 2 ms 2668 KB Output is correct
9 Correct 2 ms 2668 KB Output is correct
10 Correct 2 ms 2668 KB Output is correct
11 Correct 2 ms 2668 KB Output is correct
12 Correct 2 ms 2668 KB Output is correct
13 Correct 2 ms 2668 KB Output is correct
14 Correct 2 ms 2668 KB Output is correct
15 Correct 2 ms 2668 KB Output is correct
16 Correct 2 ms 2668 KB Output is correct
17 Correct 2 ms 2668 KB Output is correct
18 Correct 2 ms 2668 KB Output is correct
19 Correct 2 ms 2688 KB Output is correct
20 Correct 2 ms 2668 KB Output is correct
21 Correct 2 ms 2668 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2668 KB Output is correct
2 Correct 2 ms 2668 KB Output is correct
3 Correct 2 ms 2668 KB Output is correct
4 Correct 2 ms 2668 KB Output is correct
5 Correct 2 ms 2668 KB Output is correct
6 Correct 2 ms 2668 KB Output is correct
7 Correct 2 ms 2668 KB Output is correct
8 Correct 2 ms 2668 KB Output is correct
9 Correct 2 ms 2668 KB Output is correct
10 Correct 2 ms 2668 KB Output is correct
11 Correct 2 ms 2668 KB Output is correct
12 Correct 2 ms 2668 KB Output is correct
13 Correct 2 ms 2668 KB Output is correct
14 Correct 2 ms 2668 KB Output is correct
15 Correct 2 ms 2668 KB Output is correct
16 Correct 2 ms 2668 KB Output is correct
17 Correct 2 ms 2668 KB Output is correct
18 Correct 2 ms 2668 KB Output is correct
19 Correct 2 ms 2688 KB Output is correct
20 Correct 2 ms 2668 KB Output is correct
21 Correct 2 ms 2668 KB Output is correct
22 Correct 96 ms 2796 KB Output is correct
23 Correct 86 ms 2796 KB Output is correct
24 Correct 72 ms 2796 KB Output is correct
25 Correct 49 ms 2796 KB Output is correct
26 Correct 26 ms 2796 KB Output is correct
27 Correct 12 ms 2796 KB Output is correct
28 Correct 3 ms 2796 KB Output is correct
29 Correct 106 ms 2924 KB Output is correct
30 Correct 53 ms 3128 KB Output is correct
31 Correct 79 ms 2924 KB Output is correct
32 Correct 41 ms 2796 KB Output is correct
33 Correct 81 ms 2796 KB Output is correct
34 Correct 48 ms 2796 KB Output is correct
35 Correct 24 ms 2796 KB Output is correct
36 Correct 12 ms 2796 KB Output is correct
37 Correct 57 ms 2796 KB Output is correct
38 Correct 48 ms 2796 KB Output is correct
39 Correct 102 ms 2796 KB Output is correct
40 Correct 53 ms 2920 KB Output is correct
41 Correct 28 ms 2924 KB Output is correct
42 Correct 51 ms 2800 KB Output is correct
43 Correct 13 ms 2796 KB Output is correct
44 Correct 75 ms 2796 KB Output is correct
45 Correct 58 ms 2796 KB Output is correct
46 Correct 41 ms 2796 KB Output is correct
47 Correct 22 ms 2796 KB Output is correct
48 Correct 72 ms 2924 KB Output is correct
49 Correct 77 ms 2924 KB Output is correct
50 Correct 74 ms 2796 KB Output is correct
51 Correct 77 ms 2796 KB Output is correct
52 Correct 77 ms 2796 KB Output is correct
53 Correct 60 ms 2796 KB Output is correct
54 Correct 77 ms 2796 KB Output is correct
55 Correct 80 ms 2796 KB Output is correct
56 Correct 3 ms 2796 KB Output is correct
57 Correct 3 ms 2924 KB Output is correct
58 Correct 41 ms 2816 KB Output is correct
59 Correct 41 ms 2796 KB Output is correct
60 Correct 3 ms 2924 KB Output is correct
61 Correct 3 ms 2796 KB Output is correct
62 Correct 3 ms 2924 KB Output is correct
63 Correct 69 ms 2848 KB Output is correct

Subtask #3
0.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2668 KB Output is correct
2 Correct 2 ms 2668 KB Output is correct
3 Correct 2 ms 2668 KB Output is correct
4 Correct 2 ms 2668 KB Output is correct
5 Correct 2 ms 2668 KB Output is correct
6 Correct 2 ms 2668 KB Output is correct
7 Correct 2 ms 2668 KB Output is correct
8 Correct 2 ms 2668 KB Output is correct
9 Correct 2 ms 2668 KB Output is correct
10 Correct 2 ms 2668 KB Output is correct
11 Correct 2 ms 2668 KB Output is correct
12 Correct 2 ms 2668 KB Output is correct
13 Correct 2 ms 2668 KB Output is correct
14 Correct 2 ms 2668 KB Output is correct
15 Correct 2 ms 2668 KB Output is correct
16 Correct 2 ms 2668 KB Output is correct
17 Correct 2 ms 2668 KB Output is correct
18 Correct 2 ms 2668 KB Output is correct
19 Correct 2 ms 2688 KB Output is correct
20 Correct 2 ms 2668 KB Output is correct
21 Correct 2 ms 2668 KB Output is correct
22 Correct 96 ms 2796 KB Output is correct
23 Correct 86 ms 2796 KB Output is correct
24 Correct 72 ms 2796 KB Output is correct
25 Correct 49 ms 2796 KB Output is correct
26 Correct 26 ms 2796 KB Output is correct
27 Correct 12 ms 2796 KB Output is correct
28 Correct 3 ms 2796 KB Output is correct
29 Correct 106 ms 2924 KB Output is correct
30 Correct 53 ms 3128 KB Output is correct
31 Correct 79 ms 2924 KB Output is correct
32 Correct 41 ms 2796 KB Output is correct
33 Correct 81 ms 2796 KB Output is correct
34 Correct 48 ms 2796 KB Output is correct
35 Correct 24 ms 2796 KB Output is correct
36 Correct 12 ms 2796 KB Output is correct
37 Correct 57 ms 2796 KB Output is correct
38 Correct 48 ms 2796 KB Output is correct
39 Correct 102 ms 2796 KB Output is correct
40 Correct 53 ms 2920 KB Output is correct
41 Correct 28 ms 2924 KB Output is correct
42 Correct 51 ms 2800 KB Output is correct
43 Correct 13 ms 2796 KB Output is correct
44 Correct 75 ms 2796 KB Output is correct
45 Correct 58 ms 2796 KB Output is correct
46 Correct 41 ms 2796 KB Output is correct
47 Correct 22 ms 2796 KB Output is correct
48 Correct 72 ms 2924 KB Output is correct
49 Correct 77 ms 2924 KB Output is correct
50 Correct 74 ms 2796 KB Output is correct
51 Correct 77 ms 2796 KB Output is correct
52 Correct 77 ms 2796 KB Output is correct
53 Correct 60 ms 2796 KB Output is correct
54 Correct 77 ms 2796 KB Output is correct
55 Correct 80 ms 2796 KB Output is correct
56 Correct 3 ms 2796 KB Output is correct
57 Correct 3 ms 2924 KB Output is correct
58 Correct 41 ms 2816 KB Output is correct
59 Correct 41 ms 2796 KB Output is correct
60 Correct 3 ms 2924 KB Output is correct
61 Correct 3 ms 2796 KB Output is correct
62 Correct 3 ms 2924 KB Output is correct
63 Correct 69 ms 2848 KB Output is correct
64 Runtime error 5 ms 5228 KB Execution killed with signal 11
65 Halted 0 ms 0 KB -