Submission #308162

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
308162	2020-09-30 07:34:55	ainta	Stations (IOI20_stations)	C++17	100 / 100	1013 ms	1160 KiB

stations

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#include "stations.h"
#include <vector>
#include <algorithm>
using namespace std;
vector<int>E[1010];
int Num[1010], cnt;
void DFS(int a, int pp, int dep){
  int i;
  if(!dep)Num[a]=++cnt;
  for(auto &x : E[a]){
    if(x==pp)continue;
    DFS(x,a,!dep);
  }
  if(dep)Num[a]=++cnt;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
  std::vector<int> labels(n);
  cnt = 0;
  for(int i=0;i<n;i++)E[i].clear();
  for (int i = 0; i < n; i++) {
    labels[i] = i;
  }
  for(int i=0;i<n-1;i++){
    E[u[i]].push_back(v[i]);
    E[v[i]].push_back(u[i]);
  }
  DFS(0,-1,0);
 
 
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Compilation message (stderr)

stations.cpp: In function 'void DFS(int, int, int)':
stations.cpp:10:6: warning: unused variable 'i' [-Wunused-variable]
   10 |  int i;
      |      ^
stations.cpp: In function 'bool Include(int, int)':
stations.cpp:38:1: warning: no return statement in function returning non-void [-Wreturn-type]
   38 | }
      | ^
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:41:6: warning: unused variable 'i' [-Wunused-variable]
   41 |  int i;
      |      ^

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61