oj.uz

Submission #773022

# Submission time Handle Problem Language Result Execution time Memory
773022 2023-07-04T14:09:04 Z Sam_a17 Power Plant (JOI20_power) C++17
47 / 100
 1500 ms 13488 KB 
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include "temp.cpp"
#include <cstdio>
using namespace std;
 
#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif
 
#define sz(x) (int)x.size()
#define len(x) (int)x.length()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define clr(x) (x).clear()
#define uniq(x) x.resize(unique(all(x)) - x.begin());
#define blt __builtin_popcount
 
#define pb push_back
#define popf pop_front
#define popb pop_back
#define ld long double
#define ll long long
 
void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(long double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}
 
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'
 
// Indexed Set  
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
 
template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T, class V> void print(T v[],V n) {cerr << "["; for(int i = 0; i < n; i++) {print(v[i]); cerr << " "; } cerr << "]";}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
// template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(Tree <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(deque <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
 
 
// for random generations
// mt19937 myrand(chrono::steady_clock::now().time_since_epoch().count());
mt19937 myrand(131);
 
// for grid problems
int dx[8] = {-1,0,1,0,1,-1,1,-1};
int dy[8] = {0,1,0,-1,1,1,-1,-1};
 
// lowest / (1 << 17) >= 1e5 / (1 << 18) >= 2e5 / (1 << 21) >= 1e6
void fastIO() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr); cout.tie(nullptr);
}
// file in/out
void setIO(string str = "") {
  fastIO();
 
  // if(str == "input") {
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
  // } else if(str != "") {
    // freopen((str + ".in").c_str(), "r", stdin);
    // freopen((str + ".out").c_str(), "w", stdout);
  // }
}
 
const int N = 2e5 + 10;
vector<int> adj[N];
int n, dp[N];
bool is_bomb[N];
  int answ = 0;
 
void dfs(int node, int parent) {
  if(parent) {
    if(is_bomb[node]) {
      dp[node] = 1;
    } else {
      dp[node] = 0;
    }
  } else {
    dp[node] = 0;
  }
 
  for(auto i: adj[node]) {
    if(i == parent) continue;
    dfs(i, node);
  }
 
  int is_black = 0, ans = 0;
  for(auto i: adj[node]) {
    if(i == parent) continue;
    if(dp[i] > 0) {
      is_black++;
    }
    ans += max(0, dp[i]);
  }
 
  if(is_black) {
    ans -= dp[node];
  }
  
  if(!parent) {
    if(is_black >= 2) {
      answ = max(answ, ans - is_bomb[node]);
    } else {
      answ = max(answ, ans + is_bomb[node]);
    }
  } else {
    dp[node] = max(dp[node], ans);
  }
}
 
void solve_() {
  cin >> n;
 
  for(int i = 1; i <= n - 1; i++) {
    int a, b; cin >> a >> b;
    adj[a].push_back(b);
    adj[b].push_back(a);
  }
 
  string s; cin >> s;
  vector<int> can;
  for(int i = 0; i < n; i++) {
    if(s[i] == '1') {
      can.push_back(i + 1);
      is_bomb[i + 1] = true;
    } 
  }

  vector<bool> vis(n + 1);
  for(int i = 0; i < min(sz(can), 300); i++) {
    int rnd = myrand() % sz(can);
    while(vis[rnd]) {
      rnd = myrand() % sz(can);
    }
    dfs(can[rnd], 0);
    vis[rnd] = true;
  }
 
  cout << answ << '\n';
}
 
int main() {
  setIO();
 
  auto solve = [&](int test_case)-> void {
    for(int i = 1; i <= test_case; i++) {
      solve_();
    }
  };
 
  int test_cases = 1;
  // cin >> test_cases;
  solve(test_cases);
 
  return 0;
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4976 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4976 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct
22 Correct 10 ms 5128 KB Output is correct
23 Correct 10 ms 5076 KB Output is correct
24 Correct 10 ms 5076 KB Output is correct
25 Correct 10 ms 5120 KB Output is correct
26 Correct 10 ms 5112 KB Output is correct
27 Correct 7 ms 5076 KB Output is correct
28 Correct 3 ms 5076 KB Output is correct
29 Correct 14 ms 5204 KB Output is correct
30 Correct 15 ms 5268 KB Output is correct
31 Correct 9 ms 5076 KB Output is correct
32 Correct 9 ms 5116 KB Output is correct
33 Correct 10 ms 5128 KB Output is correct
34 Correct 10 ms 5076 KB Output is correct
35 Correct 9 ms 5108 KB Output is correct
36 Correct 8 ms 5108 KB Output is correct
37 Correct 8 ms 5076 KB Output is correct
38 Correct 9 ms 5076 KB Output is correct
39 Correct 12 ms 5200 KB Output is correct
40 Correct 13 ms 5196 KB Output is correct
41 Correct 12 ms 5184 KB Output is correct
42 Correct 13 ms 5152 KB Output is correct
43 Correct 9 ms 5144 KB Output is correct
44 Correct 10 ms 5076 KB Output is correct
45 Correct 9 ms 5076 KB Output is correct
46 Correct 10 ms 5144 KB Output is correct
47 Correct 9 ms 5076 KB Output is correct
48 Correct 10 ms 5196 KB Output is correct
49 Correct 13 ms 5204 KB Output is correct
50 Correct 11 ms 5180 KB Output is correct
51 Correct 10 ms 5164 KB Output is correct
52 Correct 9 ms 5132 KB Output is correct
53 Correct 9 ms 5076 KB Output is correct
54 Correct 10 ms 5164 KB Output is correct
55 Correct 10 ms 5076 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 3 ms 5204 KB Output is correct
58 Correct 6 ms 5076 KB Output is correct
59 Correct 6 ms 5076 KB Output is correct
60 Correct 3 ms 5204 KB Output is correct
61 Correct 3 ms 5076 KB Output is correct
62 Correct 3 ms 5204 KB Output is correct
63 Correct 9 ms 5076 KB Output is correct

Subtask #3
0.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4976 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct
22 Correct 10 ms 5128 KB Output is correct
23 Correct 10 ms 5076 KB Output is correct
24 Correct 10 ms 5076 KB Output is correct
25 Correct 10 ms 5120 KB Output is correct
26 Correct 10 ms 5112 KB Output is correct
27 Correct 7 ms 5076 KB Output is correct
28 Correct 3 ms 5076 KB Output is correct
29 Correct 14 ms 5204 KB Output is correct
30 Correct 15 ms 5268 KB Output is correct
31 Correct 9 ms 5076 KB Output is correct
32 Correct 9 ms 5116 KB Output is correct
33 Correct 10 ms 5128 KB Output is correct
34 Correct 10 ms 5076 KB Output is correct
35 Correct 9 ms 5108 KB Output is correct
36 Correct 8 ms 5108 KB Output is correct
37 Correct 8 ms 5076 KB Output is correct
38 Correct 9 ms 5076 KB Output is correct
39 Correct 12 ms 5200 KB Output is correct
40 Correct 13 ms 5196 KB Output is correct
41 Correct 12 ms 5184 KB Output is correct
42 Correct 13 ms 5152 KB Output is correct
43 Correct 9 ms 5144 KB Output is correct
44 Correct 10 ms 5076 KB Output is correct
45 Correct 9 ms 5076 KB Output is correct
46 Correct 10 ms 5144 KB Output is correct
47 Correct 9 ms 5076 KB Output is correct
48 Correct 10 ms 5196 KB Output is correct
49 Correct 13 ms 5204 KB Output is correct
50 Correct 11 ms 5180 KB Output is correct
51 Correct 10 ms 5164 KB Output is correct
52 Correct 9 ms 5132 KB Output is correct
53 Correct 9 ms 5076 KB Output is correct
54 Correct 10 ms 5164 KB Output is correct
55 Correct 10 ms 5076 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 3 ms 5204 KB Output is correct
58 Correct 6 ms 5076 KB Output is correct
59 Correct 6 ms 5076 KB Output is correct
60 Correct 3 ms 5204 KB Output is correct
61 Correct 3 ms 5076 KB Output is correct
62 Correct 3 ms 5204 KB Output is correct
63 Correct 9 ms 5076 KB Output is correct
64 Execution timed out 1568 ms 13488 KB Time limit exceeded
65 Halted 0 ms 0 KB -