Submission #386291

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
386291	2021-04-06 09:51:39	model_code	Meetings 2 (JOI21_meetings2)	C++17	100 / 100	580 ms	50796 KiB

meetings2

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#include <bits/stdc++.h>
#define SIZE 200005
#define BT 21
using namespace std;
typedef pair <int, int> P;
vector <int> vec[SIZE];
vector <int> vt[SIZE];
int nd[SIZE], ans[SIZE];
P centroid(int v, int p, int all) {
  P ret = P(all, v);
  int mx = 0;
  nd[v] = 1;
  for(int i=0; i < vec[v].size(); i++) {
    int to = vec[v][i];
    if(to != p) {
      ret = min(ret, centroid(to, v, all));
      nd[v] += nd[to];
      mx = max(mx, nd[to]);
    }
  }
  mx = max(mx, all - nd[v]);
  ret = min(ret, P(mx, v));
  return ret;
}
int par[SIZE][BT], dep[SIZE];
void dfs(int v, int p, int d) {
  dep[v] = d;
  par[v][0] = p;
  nd[v] = 1;
 
 
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Compilation message (stderr)

meetings2.cpp: In function 'P centroid(int, int, int)':
meetings2.cpp:14:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for(int i=0; i < vec[v].size(); i++) {
      |               ~~^~~~~~~~~~~~~~~
meetings2.cpp: In function 'void dfs(int, int, int)':
meetings2.cpp:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |  for(int i = 0; i < vec[v].size(); i++) {
      |                 ~~^~~~~~~~~~~~~~~
meetings2.cpp: In function 'int main()':
meetings2.cpp:79:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |   for(int j = 0; j < vt[i].size(); j++) {
      |                  ~~^~~~~~~~~~~~~~
meetings2.cpp:65:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
meetings2.cpp:68:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   68 |   scanf("%d %d", &a, &b);
      |   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 16 / 16
• Subtask 3: 80 / 80