oj.uz

답안 #387549

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
387549 2021-04-09T00:06:09 Z timmyfeng Power Plant (JOI20_power) C++17
100 / 100
 265 ms 28880 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 200001;

int profit[N], ans;
vector<int> adj[N];
string power;

void dfs_pull(int u, int p = 0) {
    profit[u] = '0' - power[u];
    for (auto c : adj[u]) {
        if (c != p) {
            dfs_pull(c, u);
            profit[u] += profit[c];
        }
    }
    profit[u] = max(profit[u], power[u] - '0');
}

void dfs_push(int u, int p = 0) {
    profit[u] = '0' - power[u];
    for (auto c : adj[u]) {
        profit[u] += profit[c];
    }

    ans = max(ans, profit[u]);

    for (auto c : adj[u]) {
        if (c != p) {
            int prv = profit[u];
            profit[u] = max(profit[u] - profit[c], power[u] - '0');
            dfs_push(c, u);
            profit[u] = prv;
        }
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    for (int i = 0; i < n - 1; ++i) {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    cin >> power;
    power = " " + power;

    ans = 1;
    for (int i = 1; i <= n; ++i) {
        for (auto j : adj[i]) {
            if (power[i] == '1' && power[j] == '1') {
                ans = 2;
            }
        }
    }

    dfs_pull(1);
    dfs_push(1);

    cout << ans << "\n";
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4896 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 5016 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5016 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 5024 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4896 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 5016 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5016 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 5024 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 4 ms 5068 KB Output is correct
23 Correct 4 ms 5068 KB Output is correct
24 Correct 4 ms 5072 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 4 ms 5068 KB Output is correct
27 Correct 4 ms 5036 KB Output is correct
28 Correct 4 ms 5068 KB Output is correct
29 Correct 4 ms 5196 KB Output is correct
30 Correct 4 ms 5196 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5024 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 4 ms 5164 KB Output is correct
40 Correct 4 ms 5068 KB Output is correct
41 Correct 4 ms 5068 KB Output is correct
42 Correct 4 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 4 ms 5068 KB Output is correct
45 Correct 4 ms 5068 KB Output is correct
46 Correct 4 ms 5068 KB Output is correct
47 Correct 4 ms 5068 KB Output is correct
48 Correct 4 ms 5160 KB Output is correct
49 Correct 4 ms 5196 KB Output is correct
50 Correct 4 ms 5068 KB Output is correct
51 Correct 4 ms 5088 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct
53 Correct 4 ms 5068 KB Output is correct
54 Correct 4 ms 5068 KB Output is correct
55 Correct 4 ms 5084 KB Output is correct
56 Correct 4 ms 5068 KB Output is correct
57 Correct 5 ms 5196 KB Output is correct
58 Correct 4 ms 5068 KB Output is correct
59 Correct 4 ms 5032 KB Output is correct
60 Correct 4 ms 5160 KB Output is correct
61 Correct 4 ms 5084 KB Output is correct
62 Correct 4 ms 5212 KB Output is correct
63 Correct 4 ms 5068 KB Output is correct

Subtask #3
53.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4896 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 5016 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5016 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 5024 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 4 ms 5068 KB Output is correct
23 Correct 4 ms 5068 KB Output is correct
24 Correct 4 ms 5072 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 4 ms 5068 KB Output is correct
27 Correct 4 ms 5036 KB Output is correct
28 Correct 4 ms 5068 KB Output is correct
29 Correct 4 ms 5196 KB Output is correct
30 Correct 4 ms 5196 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5024 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 4 ms 5164 KB Output is correct
40 Correct 4 ms 5068 KB Output is correct
41 Correct 4 ms 5068 KB Output is correct
42 Correct 4 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 4 ms 5068 KB Output is correct
45 Correct 4 ms 5068 KB Output is correct
46 Correct 4 ms 5068 KB Output is correct
47 Correct 4 ms 5068 KB Output is correct
48 Correct 4 ms 5160 KB Output is correct
49 Correct 4 ms 5196 KB Output is correct
50 Correct 4 ms 5068 KB Output is correct
51 Correct 4 ms 5088 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct
53 Correct 4 ms 5068 KB Output is correct
54 Correct 4 ms 5068 KB Output is correct
55 Correct 4 ms 5084 KB Output is correct
56 Correct 4 ms 5068 KB Output is correct
57 Correct 5 ms 5196 KB Output is correct
58 Correct 4 ms 5068 KB Output is correct
59 Correct 4 ms 5032 KB Output is correct
60 Correct 4 ms 5160 KB Output is correct
61 Correct 4 ms 5084 KB Output is correct
62 Correct 4 ms 5212 KB Output is correct
63 Correct 4 ms 5068 KB Output is correct
64 Correct 210 ms 15192 KB Output is correct
65 Correct 226 ms 15124 KB Output is correct
66 Correct 205 ms 15148 KB Output is correct
67 Correct 205 ms 15132 KB Output is correct
68 Correct 209 ms 15148 KB Output is correct
69 Correct 198 ms 15104 KB Output is correct
70 Correct 200 ms 15116 KB Output is correct
71 Correct 199 ms 15180 KB Output is correct
72 Correct 199 ms 15164 KB Output is correct
73 Correct 254 ms 27808 KB Output is correct
74 Correct 254 ms 27712 KB Output is correct
75 Correct 193 ms 15036 KB Output is correct
76 Correct 201 ms 14992 KB Output is correct
77 Correct 212 ms 15060 KB Output is correct
78 Correct 223 ms 15036 KB Output is correct
79 Correct 212 ms 15032 KB Output is correct
80 Correct 224 ms 14996 KB Output is correct
81 Correct 163 ms 15420 KB Output is correct
82 Correct 191 ms 15360 KB Output is correct
83 Correct 230 ms 20284 KB Output is correct
84 Correct 230 ms 22348 KB Output is correct
85 Correct 230 ms 22076 KB Output is correct
86 Correct 232 ms 16456 KB Output is correct
87 Correct 212 ms 15892 KB Output is correct
88 Correct 199 ms 16380 KB Output is correct
89 Correct 196 ms 16384 KB Output is correct
90 Correct 200 ms 16104 KB Output is correct
91 Correct 197 ms 16404 KB Output is correct
92 Correct 195 ms 16704 KB Output is correct
93 Correct 197 ms 19048 KB Output is correct
94 Correct 185 ms 20920 KB Output is correct
95 Correct 194 ms 19564 KB Output is correct
96 Correct 199 ms 17704 KB Output is correct
97 Correct 194 ms 16208 KB Output is correct
98 Correct 185 ms 15728 KB Output is correct
99 Correct 208 ms 15444 KB Output is correct
100 Correct 196 ms 18732 KB Output is correct
101 Correct 204 ms 16664 KB Output is correct
102 Correct 187 ms 15888 KB Output is correct
103 Correct 206 ms 15800 KB Output is correct
104 Correct 111 ms 15992 KB Output is correct
105 Correct 239 ms 24636 KB Output is correct
106 Correct 113 ms 15924 KB Output is correct
107 Correct 113 ms 16020 KB Output is correct
108 Correct 248 ms 28476 KB Output is correct
109 Correct 118 ms 15996 KB Output is correct
110 Correct 265 ms 28880 KB Output is correct
111 Correct 190 ms 15052 KB Output is correct