Submission #727531

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
727531	2023-04-21 00:03:54	cig32	Tourism (JOI23_tourism)	C++17	100 / 100	1518 ms	81128 KiB

tourism

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#include "bits/stdc++.h"
#define int long long
using namespace std;
int n, m, q;
const int MAXN = 1e5+10;
vector<int> e;
vector<int> adj[MAXN];
int dep[MAXN];
int par[MAXN];
int tin[MAXN], cur;
vector<int> ord;
void dfs(int node, int prv) {
  e.push_back(node);
  ord.push_back(node);
  par[node] = prv;
  tin[node] = ++cur;
  dep[node] = (prv == -1 ? 0 : dep[prv] + 1);
  for(int x: adj[node]) {
    if(x != prv) {
      dfs(x, node);
      e.push_back(node);
    }
  }
}
int l[MAXN], r[MAXN];
pair<int,int> st[18][2 * MAXN];
int lca(int x, int y) {
  int m1 = min(l[x], l[y]), m2 = max(r[x], r[y]);
  int k = 32 - __builtin_clz(m2-m1+1) - 1;
  return min(st[k][m1], st[k][m2-(1<<k)+1]).second;
 
 
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Compilation message (stderr)

tourism.cpp: In function 'int32_t main()':
tourism.cpp:158:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  158 |   for(int i=0; i<e.size(); i++) r[e[i]] = i;
      |                ~^~~~~~~~~
tourism.cpp:160:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  160 |   for(int i=0; i<e.size(); i++) st[0][i] = {dep[e[i]], e[i]};
      |                ~^~~~~~~~~
tourism.cpp:162:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  162 |     for(int j=0; j+(1<<i)-1<e.size(); j++) {
      |                  ~~~~~~~~~~^~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 7 / 7
• Subtask 4: 18 / 18
• Subtask 5: 24 / 24
• Subtask 6: 41 / 41