Submission #602673

#	Time	Username	Problem	Language	Result	Execution time	Memory
602673		Sam_a17	Jail (JOI22_jail)	C++14	0 / 100	10 ms	5076 KiB

jail

#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(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 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 != "") {
    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, LOG = 22;
// vector<int> adj[N];
long long n, m, sz[N], p[N], depth[N];
long long id[N], top[N];
vector<int> adj[N];
 
// Range Queries
struct segTree {
  // 0 indexed
  // [l: r + 1]
 
  // for 1 index
  // [l - 1: r]
  vector<long long> mTree;
  int size;
 
  void init(long long n) {
    size = 1;
    while(size < n)  {
      size *= 2;
    }
    mTree.assign(2 * size - 1, -1e9);
  }
 
  void upd(int u, long long v, int x, int lx, int rx) { // set value at pos u
    if(rx - lx == 1) {
      mTree[x] = v;
      return;
    }
 
    int m = (lx + rx) / 2;
    if(u < m) {
      upd(u, v, 2 * x + 1, lx, m);
    }else {
      upd(u, v, 2 * x + 2, m, rx);
    }
    mTree[x] = min(mTree[2 * x + 1], mTree[2 * x + 2]);
  }
 
  void upd(int u, long long v) {
    upd(u, v, 0, 0, size);
  }
 
  long long qry (long long l, long long  r, int x, int lx, int rx) { // range queries
    if(l >= rx || lx >= r) {
      return -1e9;
    }
    if(lx >= l && r >= rx) {
      return mTree[x];
    }
 
    int m = (rx + lx) / 2;
    long long s1 = qry(l, r, 2 * x + 1, lx, m);
    long long s2 = qry(l, r, 2 * x + 2, m, rx);
    return max(s1, s2);
  }
 
  long long qry(long long l, long long r) {
    return qry(l, r, 0,0,size);
  }
};
 
segTree seg;
 
long long  dfs_sz(int node, int parent) {
  sz[node] = 1, p[node] = parent;
  for(auto u: adj[node]) {
    if(u == parent) continue;
    depth[u] = depth[node] + 1;
    sz[node] += dfs_sz(u, node);
  }
  return sz[node];
}
 
long long it = 1;
 
void dfs_hld(int node, int parent, int tp) {
  id[node] = it++, top[node] = tp;
  // seg.upd(id[node], value[node]);  
  int heavy_child = -1, heavy_size = -1;
  for(auto u: adj[node]) {
    if(u == parent) continue;
    if(sz[u] > heavy_size) {
      heavy_size = sz[u];
      heavy_child = u;
    }
  }
 
  if(heavy_child == -1) {
    return;
  }
 
  dfs_hld(heavy_child, node, tp);
  for(auto u: adj[node]) {
    if(u == parent || u == heavy_child) continue;
    dfs_hld(u, node, u);
  }
}
 
long long path(int x, int y) {
  long long answ = 0;
  while(top[x] != top[y]) {
    if(depth[top[x]] < depth[top[y]]) {
      swap(x, y);
    }
    // dbg(seg.qry(id[top[x]], id[x] + 1))
    answ += seg.qry(id[top[x]], id[x] + 1);
    x = p[top[x]];
  }
  if(depth[x] > depth[y]) {
    swap(x, y);
  }
  answ +=seg.qry(id[x], id[y] + 1);
  return answ;
}

void clear() {
  for(int i = 1; i <= n; i++) {
    adj[i].clear();
    sz[i] = p[i] = id[i] = top[i] = 0;
  }
}

void solve_() {
  clear();
  cin >> n, seg.init(n + 10);
  for(int i = 1; i <= n - 1; i++) {
    int a, b; cin >> a >> b;
    adj[a].push_back(b);
    adj[b].push_back(a);
  }

  cin >> m;
  vector<pair<int, int>> prisoners;
  for(int i = 1; i <= m; i++) {
    int a, b; cin >> a >> b;
    prisoners.push_back({a, b});
    seg.upd(b, a);
  }

  // dfs_sz(1, 0);
  // dfs_hld(1, 0, 1);

  // dbg("done")

  // M^2
  for(int i = 0; i < m; i++) {
    int ax = prisoners[i].first, bx = prisoners[i].second;
    ll answ = seg.qry(ax, bx);
    // dbg(answ);
    // dbg(bx)
    if(answ >= ax) {
      cout << "No" << endl;
      return;
    }
  }


  cout << "Yes" << endl;
}

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 (stderr)

jail.cpp: In function 'void setIO(std::string)':
jail.cpp:66:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jail.cpp:67:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 16
• Subtask 4: 0 / 28
• Subtask 5: 0 / 12
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23