oj.uz

Submission #752777

# Submission time Handle Problem Language Result Execution time Memory
752777 2023-06-03T20:48:26 Z Sam_a17 Capital City (JOI20_capital_city) C++17
11 / 100
 3000 ms 27752 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 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(unsigned long long t) {cerr << t;}
void print(long double t) {cerr << t;}
 
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> void print(T v[],T n) {cerr << "["; for(int i = 0; i < n; i++) {cerr << v[i] << " ";} 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(deque <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, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}
 
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'
 
// 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};

long long ka() {
	long long x = 0;
	bool z = false;
	while (1)
	{
		char y = getchar();
		if (y == '-')
			z = true;
		else if ('0' <= y && y <= '9')
			x = x * 10 + y - '0';
		else
		{
			if (z)
				x *= -1;
			return x;
		}
	}
}

// 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 != "") {
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
  }
}
 
// Indexed Set
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int N = 2e5 + 10;
vector<int> adj[N], qq[N];
bool used[N], vis[N];
int n, k, ans, curr, cc[N];
queue<int> q;

void add_group(int group) {
  curr++;
  for(auto i: qq[group]) {
    if(!vis[i]) {
      q.push(i);
    }
  }
  used[group] = true;
}

int p[N];

void dfs(int node, int parent) {
  p[node] = parent;
  for(auto i: adj[node]) {
    if(i == parent) continue;
    dfs(i, node);
  }
}

void go_up(int node) {
  if(vis[node]) {
    return;
  } else if(!used[cc[node]]) {
    add_group(cc[node]);
  }
  node = p[node];
  go_up(node);
}

void solve_() {
  cin >> n >> k;

  for(int i = 1; i <= n - 1; i++) {
    int a, b; cin >> a >> b;
    adj[a].push_back(b);
    adj[b].push_back(a);
  }

  for(int i = 1; i <= n; i++) {
    int c; cin >> c;
    cc[i] = c;
    qq[c].push_back(i);
  }

  ans = k;
  for(int i = 1; i <= k; i++) {
    if(qq[i].empty()) continue;
    vis[qq[i].front()] = true;
    curr = 0, add_group(i);

    dfs(qq[i].front(), 0);

    while(!q.empty()) {
      auto u = q.front();
      q.pop();
      go_up(u);
    }

    ans = min(ans, curr);
    for(int j = 1; j <= k; j++) {
      used[j] = false;
    }
    for(int j = 1; j <= n; j++) {
      vis[j] = false;
    }
  }

  cout << ans - 1 << '\n';
}
 
int main() {
  setIO();
  
  auto solve = [&](int test_case)-> void {
    while(test_case--) {
      solve_();
    }
  };
 
  int test_cases = 1; 
  // cin >> test_cases;
  solve(test_cases);
 
  return 0;
}

Compilation message

capital_city.cpp: In function 'void setIO(std::string)':
capital_city.cpp:88:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
capital_city.cpp:89:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 6 ms 9644 KB Output is correct
4 Correct 6 ms 9640 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 7 ms 9732 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 6 ms 9644 KB Output is correct
4 Correct 6 ms 9640 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 7 ms 9732 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 37 ms 9832 KB Output is correct
12 Correct 35 ms 9812 KB Output is correct
13 Correct 37 ms 9812 KB Output is correct
14 Correct 37 ms 9860 KB Output is correct
15 Correct 48 ms 9812 KB Output is correct
16 Correct 107 ms 9856 KB Output is correct
17 Correct 610 ms 9880 KB Output is correct
18 Correct 607 ms 9880 KB Output is correct
19 Correct 635 ms 9884 KB Output is correct
20 Correct 612 ms 9880 KB Output is correct
21 Correct 626 ms 9900 KB Output is correct
22 Correct 1613 ms 10048 KB Output is correct
23 Correct 1449 ms 9924 KB Output is correct
24 Correct 232 ms 9880 KB Output is correct
25 Correct 454 ms 9908 KB Output is correct
26 Correct 443 ms 9856 KB Output is correct
27 Correct 426 ms 9916 KB Output is correct
28 Correct 246 ms 9904 KB Output is correct
29 Correct 250 ms 9896 KB Output is correct
30 Correct 267 ms 9896 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3041 ms 27752 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 6 ms 9644 KB Output is correct
4 Correct 6 ms 9640 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 7 ms 9732 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 37 ms 9832 KB Output is correct
12 Correct 35 ms 9812 KB Output is correct
13 Correct 37 ms 9812 KB Output is correct
14 Correct 37 ms 9860 KB Output is correct
15 Correct 48 ms 9812 KB Output is correct
16 Correct 107 ms 9856 KB Output is correct
17 Correct 610 ms 9880 KB Output is correct
18 Correct 607 ms 9880 KB Output is correct
19 Correct 635 ms 9884 KB Output is correct
20 Correct 612 ms 9880 KB Output is correct
21 Correct 626 ms 9900 KB Output is correct
22 Correct 1613 ms 10048 KB Output is correct
23 Correct 1449 ms 9924 KB Output is correct
24 Correct 232 ms 9880 KB Output is correct
25 Correct 454 ms 9908 KB Output is correct
26 Correct 443 ms 9856 KB Output is correct
27 Correct 426 ms 9916 KB Output is correct
28 Correct 246 ms 9904 KB Output is correct
29 Correct 250 ms 9896 KB Output is correct
30 Correct 267 ms 9896 KB Output is correct
31 Execution timed out 3041 ms 27752 KB Time limit exceeded
32 Halted 0 ms 0 KB -