Submission #941954

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
941954	2024-03-09 20:18:28	4QT0R	Race (IOI11_race)	C++17	Compilation error	0 ms	0 KiB

race

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#include <bits/stdc++.h>
using namespace std;
vector<pair<int,int>> graph[200004];
bool usun[200004];
int siz[200004];
int ans=200004;
unordered_map<int,int> mp;
int dlugosc;
void prep(int v, int p){
  siz[v]=1;
  for (auto u : graph[v]){
    if (u.first==p || usun[u.first])continue;
    prep(u.first,v);
    siz[v]+=siz[u.first];
  }
}
int find_centr(int v, int p, int n){
  int mx_pod=0,mx_son;
  for (auto u : graph[v]){
    if (u.first==p || usun[u.first])continue;
    if (mx_pod<siz[u.first]){
      mx_son=u.first;
      mx_pod=siz[u.first];
    };
  }
  if (mx_pod*2>n)return find_centr(mx_son,v,n);
  else return v;
 
 
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Compilation message (stderr)

race.cpp: In function 'int find_centr(int, int, int)':
race.cpp:21:15: warning: 'mx_son' may be used uninitialized in this function [-Wmaybe-uninitialized]
   21 |  int mx_pod=0,mx_son;
      |               ^~~~~~
race.cpp: In function 'void dekomp(int)':
race.cpp:58:7: warning: 'mx_son' may be used uninitialized in this function [-Wmaybe-uninitialized]
   58 |   dfs2(u.first,centr,u.second,1);
      |   ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccab3ZL0.o: in function `main':
grader.cpp:(.text.startup+0x28): undefined reference to `best_path(int, int, int (*) [2], int*)'
collect2: error: ld returned 1 exit status