Submission #1089253

#	Time	Username	Problem	Language	Result	Execution time	Memory
1089253		LucasLe	Synchronization (JOI13_synchronization)	C++17	0 / 100	392 ms	262144 KiB

synchronization

#include <bits/stdc++.h>


#define                int  long long
#define                pii  pair<int, int>
#define                 fi  first
#define                 se  second
#define                 ld  long double
#define                 vi  vector<int>
#define                vii  vector<vector<int>>
#define             all(v)  (v).begin(), (v).end()
#define       rep(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i)
#define       per(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i)

using namespace std;

const int MOD = 1e9 + 7;

int add(int a, int b) {
  a += b;
  if (a >= MOD) a -= MOD;
  return a;
}

int mul(int a, int b) {
  (a *= b) %= MOD;
  return a;
}

int ceil(int x, int y) {
  return (x + y - 1) / y;
}

int bin_pow(int x, int y) {
  int res = 1;
  while (y) {
    if (y & 1) res = res * x % MOD;
    x = x * x % MOD;
    y >>= 1;
  }
  return res;
}

template<class T> bool minimize(T& a, T b) {
  if (a > b) return a = b, true;
  return false;
}

template<class T> bool maximize(T& a, T b) {
  if (a < b) return a = b, true;
  return false;
}

const int INF = 1e17;
const int maxn = 2e5 + 5;

int n, m, k;
int status[maxn + 5], c[maxn + 5];
set<int> s[maxn + 5], lmouse[maxn + 5];
vector<int> g[maxn + 5];
pair<int, int> moony[maxn + 5];

void solve(int tc) {
  cin >> n >> m >> k;
  vector<int> data(m + 1);
  for (int i = 1; i < n; ++i) {
    int u, v; cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u);
    moony[i] = make_pair(u, v);
  }
  for (int i = 1; i <= n; ++i) {
    s[i].insert(i);
    lmouse[i].insert(i);
  }
  for (int i = 1; i <= m; ++i) cin >> data[i];
  for (int i = 1; i <= k; ++i) cin >> c[i];
  for (int i = 1; i <= m; ++i) {
    int id = data[i];
    auto [u, v] = moony[id];
    status[id] ^= 1;
    if (status[id]) {
      for (int k : lmouse[u])
        for (int x : s[v]) s[k].insert(x);
      for (int k : lmouse[v])
        for (int x : s[u]) s[k].insert(x);
      lmouse[u].insert(v);
      lmouse[v].insert(u);
    } else {
      lmouse[u].erase(v);
      lmouse[v].erase(u);
    }
  }
  for (int i = 1; i <= k; ++i)
    cout << (int)s[c[i]].size() << '\n';
}

signed main() {

  ios_base::sync_with_stdio(false);
  cin.tie(0); cout.tie(0);

  int tc = 1;
  //cin >> tc;

  for (int i = 1; i <= tc; ++i) {
    solve(i);
  }
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 10
• Subtask 4: 0 / 20
• Subtask 5: 0 / 40