oj.uz

Submission #756844

# Submission time Handle Problem Language Result Execution time Memory
756844 2023-06-12T09:53:16 Z Sam_a17 Spring cleaning (CEOI20_cleaning) C++17
34 / 100
 1000 ms 21616 KB 
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
// #include <atcoder/all>
#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);
  } else if(str == "input") {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "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 = 3e5 + 10;
vector<int> adj[N];
int n, q, deg[N];

long long dp[N][3];
long long add[N];

void dfs(int node, int parent) {
  dp[node][1] = dp[node][2] = -1;

  int cnt = 0;
  for(auto i: adj[node]) {
    if(i == parent) continue;
    cnt++;
    dfs(i, node);
  }

  cnt += add[node];

  if(!cnt) {
    dp[node][1] = 0;
  } else {
    long long s = 0, c = 0;
    for(auto i: adj[node]) {
      if(i == parent) continue;
      if(dp[i][1] != -1) {
        assert(dp[i][2] == -1);
        c += 1;
        s += dp[i][1] + 1;
      } else if(dp[i][2] != -1) {
        assert(dp[i][1] == -1);
        c += 2;
        s += dp[i][2] + 2;
      } else {
        assert(false);
      }
    }

    s += add[node];
    c += add[node];

    if(c % 2 == 0) {
      dp[node][2] = s;
    } else {
      dp[node][1] = s;
    }
  }
}

void solve_() {
  // cin >> n >> q;
  n = ka(), q = ka();

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

    deg[a]++, deg[b]++;
  }

  int start = -1;
  for(int i = 1; i <= n; i++) {
    if(deg[i] > 1) {
      start = i;
      break;
    }
  }

  while(q--) {
    int d = ka();

    vector<int> vec;
    for(int i = 1; i <= d; i++) {
      int a = ka();
      vec.push_back(a);
      add[a]++;
    }

    dfs(start, 0);
    cout << dp[start][2] << '\n';

    for(auto i: vec) {
      add[i]--;
    }
  }

}
 
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

cleaning.cpp: In function 'void setIO(std::string)':
cleaning.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);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cleaning.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);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cleaning.cpp:91:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
cleaning.cpp:92:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Execution timed out 1084 ms 8744 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 8148 KB Output is correct
2 Correct 7 ms 8148 KB Output is correct
3 Correct 26 ms 14412 KB Output is correct
4 Correct 22 ms 12724 KB Output is correct
5 Correct 28 ms 14836 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 8488 KB Output is correct
2 Correct 10 ms 8532 KB Output is correct
3 Correct 50 ms 21616 KB Output is correct
4 Correct 37 ms 20804 KB Output is correct
5 Correct 37 ms 20056 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 259 ms 9436 KB Output is correct
2 Correct 169 ms 8752 KB Output is correct
3 Correct 247 ms 8672 KB Output is correct
4 Correct 323 ms 9420 KB Output is correct
5 Correct 232 ms 9428 KB Output is correct
6 Correct 295 ms 9292 KB Output is correct

Subtask #5
0 / 19.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1079 ms 11796 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1070 ms 13616 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Execution timed out 1084 ms 8744 KB Time limit exceeded
3 Halted 0 ms 0 KB -