oj.uz

답안 #503741

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
503741 2022-01-08T19:46:51 Z Abrar_Al_Samit Power Plant (JOI20_power) C++17
0 / 100
 4 ms 4940 KB 
#include<bits/stdc++.h>
using namespace std;
const int MX = 200005;
vector<int>g[MX];
int n;
int sub[MX];
string s;
int ans;
int DFS(int v, int p=0) {
  int cnt = 0;
  bool hierOn = false;
  for(int u : g[v]) if(u!=p) {
    int get = DFS(u, v);
    if(get!=0) {
      ++cnt;
      if(get==2) hierOn = 1;
    }
  }
  if(hierOn==0 && cnt<2 && s[v]=='1') {
    ++ans;
    if(cnt) sub[v] = 2;
    else sub[v] = 1;
  } else if(hierOn) {
    sub[v] = 2;
  } else {
    sub[v] = cnt!=0;
  }
  return sub[v];
}
void PlayGround() {
  cin >> n;
  for(int i=1; i<n; ++i) {
    int u, v; cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u);
  }
  cin >> s;
  s = "#" + s;
  DFS(1);
  cout << ans << endl;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  PlayGround();
  return 0;
}

Subtask #1
0.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Incorrect 3 ms 4940 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Incorrect 3 ms 4940 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Incorrect 3 ms 4940 KB Output isn't correct
6 Halted 0 ms 0 KB -