oj.uz

답안 #882852

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
882852 2023-12-03T22:03:06 Z TomkeMonke Power Plant (JOI20_power) C++17
0 / 100
 2 ms 6544 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 2e5 + 7;

vector<int> G[MAXN];
string s;

int path[MAXN], siz[MAXN];
int ans = 0;

void DFS(int v, int p){
	
	int maks = 0, sum = 0;
	
	for(auto u : G[v]){
		
		if(u == p) continue;
		sum += siz[u];
		maks = max(maks, siz[u]);
	}
	
	if(s[v] == '1'){
		
		path[v] = maks + 1;
		siz[v] = max(1, sum - 1);
	}
	
	else {
		
		path[v] = maks;
		siz[v] = sum;
	}
	
	ans = max(ans, max(path[v], siz[v]));
}





int main(){
	
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	
	int n;
	cin >> n;
	
	for(int i = 1; i < n; i++){
		
		int a, b;
		cin >> a >> b;
		
		G[a].push_back(b);
		G[b].push_back(a);
	}
	
	cin >> s;
	s = "#" + s;
	DFS(1, 1);
	
	cout << ans << '\n';
	
	return 0;
}

Subtask #1
0.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 2 ms 6488 KB Output is correct
3 Incorrect 2 ms 6544 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 2 ms 6488 KB Output is correct
3 Incorrect 2 ms 6544 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 2 ms 6488 KB Output is correct
3 Incorrect 2 ms 6544 KB Output isn't correct
4 Halted 0 ms 0 KB -