Submission #1087221

# Submission time Handle Problem Language Result Execution time Memory
1087221 2024-09-12T10:01:46 Z peacebringer1667 Power Plant (JOI20_power) C++17
100 / 100
99 ms 29860 KB
#include<bits/stdc++.h>
#define ll long long
#define ldb long double
#define fi first
#define se second
#define sza(a) (int)a.size()
#define pir pair<int,int>
#define pirll pair<ll,ll>
using namespace std;
const int maxn = 2e5 + 5;
const int inf = 1e8;

bool a[maxn];
int dp[maxn],f[maxn];
vector <vector<int>> vec(maxn);

void input(int n){
	for (int i = 1 ; i < n ; i++){
		int u,v;
		cin >> u >> v;
		vec[u].push_back(v);
		vec[v].push_back(u);
	}
	
	string s;
	cin >> s;
	for (int i = 0 ; i < s.size() ; i++)
	  a[i + 1] = s[i] - 48;
}


void dfs(int u,int par){
	int t = -a[u];
	dp[u] = a[u];
	f[u] = a[u];
	
	for (int v : vec[u])
	  if (v != par){
	  	dfs(v,u);
	  	t += dp[v];
	  	
	  	f[u] = max(f[u],a[u] + dp[v]);
	  }
	
	dp[u] = max(dp[u],t);
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
//	freopen("power.inp","r",stdin);
//	freopen("power.out","w",stdout);
	int n;
	cin >> n;
	input(n);
	
	dfs(1,0);
	int res = 0;
	for (int i = 1 ; i <= n ; i++) res = max(res,max(dp[i],f[i]));
	
	cout << res;

	return 0;
}

Compilation message

power.cpp: In function 'void input(int)':
power.cpp:27:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  for (int i = 0 ; i < s.size() ; i++)
      |                   ~~^~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5180 KB Output is correct
8 Correct 3 ms 5044 KB Output is correct
9 Correct 2 ms 4952 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 4 ms 5184 KB Output is correct
15 Correct 3 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 3 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5180 KB Output is correct
8 Correct 3 ms 5044 KB Output is correct
9 Correct 2 ms 4952 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 4 ms 5184 KB Output is correct
15 Correct 3 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 3 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 2 ms 5212 KB Output is correct
23 Correct 4 ms 5260 KB Output is correct
24 Correct 4 ms 5212 KB Output is correct
25 Correct 2 ms 5188 KB Output is correct
26 Correct 4 ms 5208 KB Output is correct
27 Correct 4 ms 5212 KB Output is correct
28 Correct 2 ms 5212 KB Output is correct
29 Correct 3 ms 5208 KB Output is correct
30 Correct 3 ms 5184 KB Output is correct
31 Correct 4 ms 5212 KB Output is correct
32 Correct 3 ms 5212 KB Output is correct
33 Correct 2 ms 5224 KB Output is correct
34 Correct 3 ms 5212 KB Output is correct
35 Correct 4 ms 5280 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 3 ms 5212 KB Output is correct
38 Correct 3 ms 5212 KB Output is correct
39 Correct 3 ms 5212 KB Output is correct
40 Correct 2 ms 5212 KB Output is correct
41 Correct 2 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 2 ms 5212 KB Output is correct
44 Correct 2 ms 5212 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 3 ms 5208 KB Output is correct
47 Correct 3 ms 5212 KB Output is correct
48 Correct 3 ms 5212 KB Output is correct
49 Correct 2 ms 5212 KB Output is correct
50 Correct 3 ms 5212 KB Output is correct
51 Correct 2 ms 5208 KB Output is correct
52 Correct 2 ms 5212 KB Output is correct
53 Correct 2 ms 5212 KB Output is correct
54 Correct 2 ms 5212 KB Output is correct
55 Correct 2 ms 5212 KB Output is correct
56 Correct 2 ms 5212 KB Output is correct
57 Correct 2 ms 5212 KB Output is correct
58 Correct 2 ms 5464 KB Output is correct
59 Correct 2 ms 5208 KB Output is correct
60 Correct 2 ms 5212 KB Output is correct
61 Correct 2 ms 5212 KB Output is correct
62 Correct 3 ms 5212 KB Output is correct
63 Correct 3 ms 5212 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5180 KB Output is correct
8 Correct 3 ms 5044 KB Output is correct
9 Correct 2 ms 4952 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 4 ms 5184 KB Output is correct
15 Correct 3 ms 4956 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 3 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 2 ms 5212 KB Output is correct
23 Correct 4 ms 5260 KB Output is correct
24 Correct 4 ms 5212 KB Output is correct
25 Correct 2 ms 5188 KB Output is correct
26 Correct 4 ms 5208 KB Output is correct
27 Correct 4 ms 5212 KB Output is correct
28 Correct 2 ms 5212 KB Output is correct
29 Correct 3 ms 5208 KB Output is correct
30 Correct 3 ms 5184 KB Output is correct
31 Correct 4 ms 5212 KB Output is correct
32 Correct 3 ms 5212 KB Output is correct
33 Correct 2 ms 5224 KB Output is correct
34 Correct 3 ms 5212 KB Output is correct
35 Correct 4 ms 5280 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 3 ms 5212 KB Output is correct
38 Correct 3 ms 5212 KB Output is correct
39 Correct 3 ms 5212 KB Output is correct
40 Correct 2 ms 5212 KB Output is correct
41 Correct 2 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 2 ms 5212 KB Output is correct
44 Correct 2 ms 5212 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 3 ms 5208 KB Output is correct
47 Correct 3 ms 5212 KB Output is correct
48 Correct 3 ms 5212 KB Output is correct
49 Correct 2 ms 5212 KB Output is correct
50 Correct 3 ms 5212 KB Output is correct
51 Correct 2 ms 5208 KB Output is correct
52 Correct 2 ms 5212 KB Output is correct
53 Correct 2 ms 5212 KB Output is correct
54 Correct 2 ms 5212 KB Output is correct
55 Correct 2 ms 5212 KB Output is correct
56 Correct 2 ms 5212 KB Output is correct
57 Correct 2 ms 5212 KB Output is correct
58 Correct 2 ms 5464 KB Output is correct
59 Correct 2 ms 5208 KB Output is correct
60 Correct 2 ms 5212 KB Output is correct
61 Correct 2 ms 5212 KB Output is correct
62 Correct 3 ms 5212 KB Output is correct
63 Correct 3 ms 5212 KB Output is correct
64 Correct 57 ms 16080 KB Output is correct
65 Correct 62 ms 16076 KB Output is correct
66 Correct 89 ms 16092 KB Output is correct
67 Correct 69 ms 16080 KB Output is correct
68 Correct 57 ms 16056 KB Output is correct
69 Correct 59 ms 16108 KB Output is correct
70 Correct 60 ms 16072 KB Output is correct
71 Correct 55 ms 15940 KB Output is correct
72 Correct 82 ms 16072 KB Output is correct
73 Correct 65 ms 28620 KB Output is correct
74 Correct 79 ms 28656 KB Output is correct
75 Correct 55 ms 15884 KB Output is correct
76 Correct 75 ms 15836 KB Output is correct
77 Correct 59 ms 15820 KB Output is correct
78 Correct 53 ms 15812 KB Output is correct
79 Correct 55 ms 15828 KB Output is correct
80 Correct 55 ms 15848 KB Output is correct
81 Correct 47 ms 16312 KB Output is correct
82 Correct 50 ms 16008 KB Output is correct
83 Correct 85 ms 21200 KB Output is correct
84 Correct 65 ms 23192 KB Output is correct
85 Correct 62 ms 23004 KB Output is correct
86 Correct 54 ms 17360 KB Output is correct
87 Correct 55 ms 16844 KB Output is correct
88 Correct 57 ms 17284 KB Output is correct
89 Correct 56 ms 17112 KB Output is correct
90 Correct 57 ms 16944 KB Output is correct
91 Correct 58 ms 17144 KB Output is correct
92 Correct 66 ms 17564 KB Output is correct
93 Correct 54 ms 19872 KB Output is correct
94 Correct 82 ms 21652 KB Output is correct
95 Correct 99 ms 20432 KB Output is correct
96 Correct 60 ms 18540 KB Output is correct
97 Correct 54 ms 16932 KB Output is correct
98 Correct 53 ms 16636 KB Output is correct
99 Correct 58 ms 16336 KB Output is correct
100 Correct 58 ms 19640 KB Output is correct
101 Correct 59 ms 17480 KB Output is correct
102 Correct 55 ms 16852 KB Output is correct
103 Correct 56 ms 16620 KB Output is correct
104 Correct 41 ms 17172 KB Output is correct
105 Correct 68 ms 25292 KB Output is correct
106 Correct 38 ms 16836 KB Output is correct
107 Correct 39 ms 16840 KB Output is correct
108 Correct 79 ms 29388 KB Output is correct
109 Correct 42 ms 16988 KB Output is correct
110 Correct 80 ms 29860 KB Output is correct
111 Correct 54 ms 15848 KB Output is correct