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답안 #306758

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
306758 2020-09-26T08:48:43 Z MrDomino Power Plant (JOI20_power) C++14
47 / 100
 1500 ms 23540 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

const int N = (int) 2e5 + 7;
int n;
vector<int> g[N];
int v[N];
int dp[N];
int sol;

void compute(int a, int p)
{
    dp[a] = -v[a];
    for (auto &b : g[a])
    {
        if (b != p)
        {
            dp[a] += dp[b];
        }
    }
    dp[a] = max(dp[a], v[a]);
}

void dfs(int a, int p)
{
    for (auto &b : g[a])
    {
        if (b != p)
        {
            dfs(b, a);
        }
    }
    compute(a, p);
}

void reroot(int a, int p)
{
    compute(a, p);
    compute(p, -1);
}

void dfs_solve(int a, int p)
{
    sol = max(sol, dp[a]);
    for (auto &b : g[a])
    {
        if (b != p)
        {
            reroot(a, b);
            dfs_solve(b, a);
            reroot(b, a);
        }
    }
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n;
    for (int i = 1; i < n; i++)
    {
        int x, y;
        cin >> x >> y;
        g[x].push_back(y);
        g[y].push_back(x);
    }
    string s;
    cin >> s;
    for (int i = 1; i <= n; i++)
    {
        if (s[i - 1] == '1')
        {
            v[i] = 1;
            sol++;
        }
    }
    sol = min(sol, 2);
    dfs(1, -1);
    dfs_solve(1, -1);
    cout << sol << "\n";
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 6 ms 5120 KB Output is correct
24 Correct 5 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 4 ms 5120 KB Output is correct
27 Correct 5 ms 5120 KB Output is correct
28 Correct 4 ms 5120 KB Output is correct
29 Correct 5 ms 5120 KB Output is correct
30 Correct 4 ms 5120 KB Output is correct
31 Correct 4 ms 5120 KB Output is correct
32 Correct 4 ms 5120 KB Output is correct
33 Correct 4 ms 5120 KB Output is correct
34 Correct 4 ms 5120 KB Output is correct
35 Correct 5 ms 5120 KB Output is correct
36 Correct 4 ms 5120 KB Output is correct
37 Correct 7 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 5 ms 5120 KB Output is correct
40 Correct 4 ms 5120 KB Output is correct
41 Correct 4 ms 5120 KB Output is correct
42 Correct 4 ms 5120 KB Output is correct
43 Correct 5 ms 5120 KB Output is correct
44 Correct 5 ms 5120 KB Output is correct
45 Correct 4 ms 5120 KB Output is correct
46 Correct 5 ms 5120 KB Output is correct
47 Correct 5 ms 5120 KB Output is correct
48 Correct 7 ms 5120 KB Output is correct
49 Correct 7 ms 5120 KB Output is correct
50 Correct 5 ms 5120 KB Output is correct
51 Correct 5 ms 5120 KB Output is correct
52 Correct 5 ms 5120 KB Output is correct
53 Correct 5 ms 5120 KB Output is correct
54 Correct 5 ms 5120 KB Output is correct
55 Correct 5 ms 5120 KB Output is correct
56 Correct 13 ms 5120 KB Output is correct
57 Correct 4 ms 5248 KB Output is correct
58 Correct 15 ms 5120 KB Output is correct
59 Correct 13 ms 5120 KB Output is correct
60 Correct 5 ms 5120 KB Output is correct
61 Correct 17 ms 5120 KB Output is correct
62 Correct 5 ms 5120 KB Output is correct
63 Correct 5 ms 5120 KB Output is correct

Subtask #3
0.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 6 ms 5120 KB Output is correct
24 Correct 5 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 4 ms 5120 KB Output is correct
27 Correct 5 ms 5120 KB Output is correct
28 Correct 4 ms 5120 KB Output is correct
29 Correct 5 ms 5120 KB Output is correct
30 Correct 4 ms 5120 KB Output is correct
31 Correct 4 ms 5120 KB Output is correct
32 Correct 4 ms 5120 KB Output is correct
33 Correct 4 ms 5120 KB Output is correct
34 Correct 4 ms 5120 KB Output is correct
35 Correct 5 ms 5120 KB Output is correct
36 Correct 4 ms 5120 KB Output is correct
37 Correct 7 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 5 ms 5120 KB Output is correct
40 Correct 4 ms 5120 KB Output is correct
41 Correct 4 ms 5120 KB Output is correct
42 Correct 4 ms 5120 KB Output is correct
43 Correct 5 ms 5120 KB Output is correct
44 Correct 5 ms 5120 KB Output is correct
45 Correct 4 ms 5120 KB Output is correct
46 Correct 5 ms 5120 KB Output is correct
47 Correct 5 ms 5120 KB Output is correct
48 Correct 7 ms 5120 KB Output is correct
49 Correct 7 ms 5120 KB Output is correct
50 Correct 5 ms 5120 KB Output is correct
51 Correct 5 ms 5120 KB Output is correct
52 Correct 5 ms 5120 KB Output is correct
53 Correct 5 ms 5120 KB Output is correct
54 Correct 5 ms 5120 KB Output is correct
55 Correct 5 ms 5120 KB Output is correct
56 Correct 13 ms 5120 KB Output is correct
57 Correct 4 ms 5248 KB Output is correct
58 Correct 15 ms 5120 KB Output is correct
59 Correct 13 ms 5120 KB Output is correct
60 Correct 5 ms 5120 KB Output is correct
61 Correct 17 ms 5120 KB Output is correct
62 Correct 5 ms 5120 KB Output is correct
63 Correct 5 ms 5120 KB Output is correct
64 Correct 227 ms 13368 KB Output is correct
65 Correct 236 ms 16056 KB Output is correct
66 Correct 223 ms 16036 KB Output is correct
67 Correct 223 ms 16056 KB Output is correct
68 Correct 223 ms 16036 KB Output is correct
69 Correct 225 ms 16052 KB Output is correct
70 Correct 232 ms 15940 KB Output is correct
71 Correct 225 ms 15940 KB Output is correct
72 Correct 220 ms 15412 KB Output is correct
73 Correct 263 ms 23480 KB Output is correct
74 Correct 277 ms 23540 KB Output is correct
75 Correct 220 ms 15928 KB Output is correct
76 Correct 222 ms 15828 KB Output is correct
77 Correct 236 ms 16056 KB Output is correct
78 Correct 228 ms 15928 KB Output is correct
79 Correct 227 ms 15936 KB Output is correct
80 Correct 231 ms 15928 KB Output is correct
81 Execution timed out 1597 ms 16372 KB Time limit exceeded
82 Halted 0 ms 0 KB -