oj.uz

Submission #765979

# Submission time Handle Problem Language Result Execution time Memory
765979 2023-06-25T08:25:29 Z yusuf12360 Power Plant (JOI20_power) C++14
0 / 100
 0 ms 212 KB 
#include<bits/stdc++.h>
using namespace std;
int ans=2;
vector<int> res;
vector<vector<int>> adj;
string s;
void dfs1(int u=0, int p=-1) {
	res[u]=s[u]-'0';
	for(int pp : adj[u]) {
		if(pp==p) continue;
		dfs1(pp, u);
		if(s[pp]=='1') res[u]++;
		else res[u]+=res[pp];
	}
}
void dfs2(int u=0, int p=-1, int to_p=0) {
	ans=max(ans, res[u]+to_p-2*(s[u]=='1'));
	for(int pp : adj[u]) {
		if(pp==p) continue;
		if(s[u]=='1') dfs2(pp, u, 1);
		else dfs2(pp, u, to_p+res[u]-res[pp]);
	}
}
int main() {
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n; cin >> n;
	res.resize(n); adj.resize(n);
	while(--n) {
		int u, v; cin >> u >> v; --u; --v;
		adj[u].push_back(v);
		adj[v].push_back(u);}
	cin >> s;
	dfs1();
	dfs2();
	cout << ans << '\n';
	return 0;
}

Subtask #1
0.0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 41.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 53.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -