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답안 #788017

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
788017 2023-07-19T16:15:20 Z YassineBenYounes Power Plant (JOI20_power) C++17
100 / 100
 196 ms 30300 KB 
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
#define pb push_back
#define vi vector<int>
#define pii pair<int, int>
#define ff first
#define ss second
#define vii vector<pii>
void init(){
    #ifndef ONLINE_JUDGE
 
freopen("input.txt", "r", stdin);
 
freopen("output.txt", "w", stdout);
 
#endif // ONLINE_JUDGE
}

const int mx = 3e5+5;
const ll mod = 1e9+7;

vector<int> graph[mx];
string s;

int dp_down[mx];

int ans = 0;

void dfs(int node, int p){
    int l = 0, sum = 0;
    for(int adj : graph[node]){
        if(adj == p)continue;
        dfs(adj ,node);
        sum += dp_down[adj];
        l = max(l, dp_down[adj]);
    }
    int k = (s[node] == '1');
    sum -= k;
    dp_down[node] = max(dp_down[node], k);
    dp_down[node] = max(dp_down[node], sum);
    ans = max(ans, l+k);
    ans = max(ans, dp_down[node]);
}

void runcase(){
    int n;cin >> n;
    for(int i = 0; i < n-1;i++){
        int a, b;cin >> a >> b;
        graph[a].pb(b);
        graph[b].pb(a);
    }
    cin >> s;
    s = "Y" + s;
    dfs(1, 1);
    cout << ans << endl;
}

int main(){
    int t;
    //cin >> t;
    t = 1;
    while(t--){
        runcase();
    }
}

Compilation message

power.cpp: In function 'void init()':
power.cpp:14:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
power.cpp:16:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7356 KB Output is correct
2 Correct 5 ms 7252 KB Output is correct
3 Correct 4 ms 7356 KB Output is correct
4 Correct 4 ms 7252 KB Output is correct
5 Correct 4 ms 7252 KB Output is correct
6 Correct 4 ms 7260 KB Output is correct
7 Correct 3 ms 7348 KB Output is correct
8 Correct 4 ms 7252 KB Output is correct
9 Correct 3 ms 7352 KB Output is correct
10 Correct 4 ms 7252 KB Output is correct
11 Correct 4 ms 7252 KB Output is correct
12 Correct 3 ms 7356 KB Output is correct
13 Correct 4 ms 7252 KB Output is correct
14 Correct 4 ms 7252 KB Output is correct
15 Correct 4 ms 7352 KB Output is correct
16 Correct 4 ms 7252 KB Output is correct
17 Correct 4 ms 7252 KB Output is correct
18 Correct 3 ms 7252 KB Output is correct
19 Correct 4 ms 7252 KB Output is correct
20 Correct 3 ms 7252 KB Output is correct
21 Correct 3 ms 7252 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7356 KB Output is correct
2 Correct 5 ms 7252 KB Output is correct
3 Correct 4 ms 7356 KB Output is correct
4 Correct 4 ms 7252 KB Output is correct
5 Correct 4 ms 7252 KB Output is correct
6 Correct 4 ms 7260 KB Output is correct
7 Correct 3 ms 7348 KB Output is correct
8 Correct 4 ms 7252 KB Output is correct
9 Correct 3 ms 7352 KB Output is correct
10 Correct 4 ms 7252 KB Output is correct
11 Correct 4 ms 7252 KB Output is correct
12 Correct 3 ms 7356 KB Output is correct
13 Correct 4 ms 7252 KB Output is correct
14 Correct 4 ms 7252 KB Output is correct
15 Correct 4 ms 7352 KB Output is correct
16 Correct 4 ms 7252 KB Output is correct
17 Correct 4 ms 7252 KB Output is correct
18 Correct 3 ms 7252 KB Output is correct
19 Correct 4 ms 7252 KB Output is correct
20 Correct 3 ms 7252 KB Output is correct
21 Correct 3 ms 7252 KB Output is correct
22 Correct 5 ms 7380 KB Output is correct
23 Correct 7 ms 7380 KB Output is correct
24 Correct 5 ms 7380 KB Output is correct
25 Correct 5 ms 7364 KB Output is correct
26 Correct 5 ms 7380 KB Output is correct
27 Correct 5 ms 7380 KB Output is correct
28 Correct 5 ms 7380 KB Output is correct
29 Correct 5 ms 7496 KB Output is correct
30 Correct 5 ms 7508 KB Output is correct
31 Correct 4 ms 7340 KB Output is correct
32 Correct 4 ms 7380 KB Output is correct
33 Correct 4 ms 7420 KB Output is correct
34 Correct 4 ms 7380 KB Output is correct
35 Correct 4 ms 7380 KB Output is correct
36 Correct 4 ms 7380 KB Output is correct
37 Correct 5 ms 7380 KB Output is correct
38 Correct 5 ms 7380 KB Output is correct
39 Correct 4 ms 7380 KB Output is correct
40 Correct 5 ms 7380 KB Output is correct
41 Correct 4 ms 7488 KB Output is correct
42 Correct 5 ms 7380 KB Output is correct
43 Correct 4 ms 7380 KB Output is correct
44 Correct 4 ms 7364 KB Output is correct
45 Correct 4 ms 7380 KB Output is correct
46 Correct 5 ms 7380 KB Output is correct
47 Correct 4 ms 7380 KB Output is correct
48 Correct 4 ms 7508 KB Output is correct
49 Correct 4 ms 7492 KB Output is correct
50 Correct 4 ms 7488 KB Output is correct
51 Correct 5 ms 7380 KB Output is correct
52 Correct 5 ms 7364 KB Output is correct
53 Correct 6 ms 7380 KB Output is correct
54 Correct 5 ms 7380 KB Output is correct
55 Correct 5 ms 7380 KB Output is correct
56 Correct 5 ms 7380 KB Output is correct
57 Correct 4 ms 7508 KB Output is correct
58 Correct 5 ms 7380 KB Output is correct
59 Correct 4 ms 7380 KB Output is correct
60 Correct 10 ms 7508 KB Output is correct
61 Correct 5 ms 7380 KB Output is correct
62 Correct 4 ms 7508 KB Output is correct
63 Correct 4 ms 7364 KB Output is correct

Subtask #3
53.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7356 KB Output is correct
2 Correct 5 ms 7252 KB Output is correct
3 Correct 4 ms 7356 KB Output is correct
4 Correct 4 ms 7252 KB Output is correct
5 Correct 4 ms 7252 KB Output is correct
6 Correct 4 ms 7260 KB Output is correct
7 Correct 3 ms 7348 KB Output is correct
8 Correct 4 ms 7252 KB Output is correct
9 Correct 3 ms 7352 KB Output is correct
10 Correct 4 ms 7252 KB Output is correct
11 Correct 4 ms 7252 KB Output is correct
12 Correct 3 ms 7356 KB Output is correct
13 Correct 4 ms 7252 KB Output is correct
14 Correct 4 ms 7252 KB Output is correct
15 Correct 4 ms 7352 KB Output is correct
16 Correct 4 ms 7252 KB Output is correct
17 Correct 4 ms 7252 KB Output is correct
18 Correct 3 ms 7252 KB Output is correct
19 Correct 4 ms 7252 KB Output is correct
20 Correct 3 ms 7252 KB Output is correct
21 Correct 3 ms 7252 KB Output is correct
22 Correct 5 ms 7380 KB Output is correct
23 Correct 7 ms 7380 KB Output is correct
24 Correct 5 ms 7380 KB Output is correct
25 Correct 5 ms 7364 KB Output is correct
26 Correct 5 ms 7380 KB Output is correct
27 Correct 5 ms 7380 KB Output is correct
28 Correct 5 ms 7380 KB Output is correct
29 Correct 5 ms 7496 KB Output is correct
30 Correct 5 ms 7508 KB Output is correct
31 Correct 4 ms 7340 KB Output is correct
32 Correct 4 ms 7380 KB Output is correct
33 Correct 4 ms 7420 KB Output is correct
34 Correct 4 ms 7380 KB Output is correct
35 Correct 4 ms 7380 KB Output is correct
36 Correct 4 ms 7380 KB Output is correct
37 Correct 5 ms 7380 KB Output is correct
38 Correct 5 ms 7380 KB Output is correct
39 Correct 4 ms 7380 KB Output is correct
40 Correct 5 ms 7380 KB Output is correct
41 Correct 4 ms 7488 KB Output is correct
42 Correct 5 ms 7380 KB Output is correct
43 Correct 4 ms 7380 KB Output is correct
44 Correct 4 ms 7364 KB Output is correct
45 Correct 4 ms 7380 KB Output is correct
46 Correct 5 ms 7380 KB Output is correct
47 Correct 4 ms 7380 KB Output is correct
48 Correct 4 ms 7508 KB Output is correct
49 Correct 4 ms 7492 KB Output is correct
50 Correct 4 ms 7488 KB Output is correct
51 Correct 5 ms 7380 KB Output is correct
52 Correct 5 ms 7364 KB Output is correct
53 Correct 6 ms 7380 KB Output is correct
54 Correct 5 ms 7380 KB Output is correct
55 Correct 5 ms 7380 KB Output is correct
56 Correct 5 ms 7380 KB Output is correct
57 Correct 4 ms 7508 KB Output is correct
58 Correct 5 ms 7380 KB Output is correct
59 Correct 4 ms 7380 KB Output is correct
60 Correct 10 ms 7508 KB Output is correct
61 Correct 5 ms 7380 KB Output is correct
62 Correct 4 ms 7508 KB Output is correct
63 Correct 4 ms 7364 KB Output is correct
64 Correct 142 ms 16572 KB Output is correct
65 Correct 196 ms 16516 KB Output is correct
66 Correct 161 ms 16612 KB Output is correct
67 Correct 154 ms 16548 KB Output is correct
68 Correct 163 ms 16588 KB Output is correct
69 Correct 132 ms 16520 KB Output is correct
70 Correct 171 ms 16500 KB Output is correct
71 Correct 134 ms 16536 KB Output is correct
72 Correct 141 ms 16564 KB Output is correct
73 Correct 160 ms 29160 KB Output is correct
74 Correct 175 ms 29108 KB Output is correct
75 Correct 131 ms 16472 KB Output is correct
76 Correct 164 ms 16504 KB Output is correct
77 Correct 170 ms 16500 KB Output is correct
78 Correct 144 ms 16476 KB Output is correct
79 Correct 134 ms 16500 KB Output is correct
80 Correct 157 ms 16448 KB Output is correct
81 Correct 124 ms 16896 KB Output is correct
82 Correct 137 ms 16556 KB Output is correct
83 Correct 160 ms 21724 KB Output is correct
84 Correct 146 ms 23732 KB Output is correct
85 Correct 166 ms 23580 KB Output is correct
86 Correct 147 ms 17956 KB Output is correct
87 Correct 159 ms 17376 KB Output is correct
88 Correct 129 ms 17764 KB Output is correct
89 Correct 148 ms 17904 KB Output is correct
90 Correct 134 ms 17556 KB Output is correct
91 Correct 139 ms 17816 KB Output is correct
92 Correct 135 ms 18160 KB Output is correct
93 Correct 145 ms 20596 KB Output is correct
94 Correct 145 ms 22340 KB Output is correct
95 Correct 150 ms 20896 KB Output is correct
96 Correct 132 ms 19100 KB Output is correct
97 Correct 133 ms 17588 KB Output is correct
98 Correct 131 ms 17112 KB Output is correct
99 Correct 148 ms 16892 KB Output is correct
100 Correct 141 ms 20100 KB Output is correct
101 Correct 135 ms 18092 KB Output is correct
102 Correct 152 ms 17324 KB Output is correct
103 Correct 130 ms 17108 KB Output is correct
104 Correct 126 ms 17536 KB Output is correct
105 Correct 166 ms 25964 KB Output is correct
106 Correct 109 ms 17284 KB Output is correct
107 Correct 107 ms 17380 KB Output is correct
108 Correct 160 ms 29952 KB Output is correct
109 Correct 115 ms 17340 KB Output is correct
110 Correct 149 ms 30300 KB Output is correct
111 Correct 140 ms 16432 KB Output is correct