Submission #311149

#	Time	Username	Problem	Language	Result	Execution time	Memory
311149		GioChkhaidze	Table Tennis (info1cup20_tabletennis)	C++14	0 / 100	152 ms	4600 KiB

tabletennis

#include <bits/stdc++.h>
 
#define ll long long
#define pb push_back
#define F first
#define S second
 
using namespace std;
 
const int N=2e5+5;

int n,k;
bool f[N];
double a[N];
map < int , int > mp;

void check(double x) {
  int r=n+k,ans=0;
  
  for (int i=1; i<=n+k; i++) f[i]=0;
  for (int l=1; l<r && a[l]<=x; l++) {
    while (x-a[l]<a[r]-x) 
      --r;

    if (l<r && x-a[l]==a[r]-x) 
      f[l]=f[r]=1,ans+=2,--r;
    if (ans==n) break;
  }
  
  if (ans==n) {
    for (int i=1; i<=n+k; i++)
      if (f[i]) cout<<a[i]<<" ";
    exit(0);
  }
}

main() {
  ios::sync_with_stdio(false);
  cin.tie(NULL),cout.tie(NULL);
  
  cin>>n>>k;
  for (int i=1; i<=n+k; i++) 
    cin>>a[i];

  int R=min(2*k,n+k);
  int L=max(1,n-k+1);
  
  for (int i=1; i<=R; i++) 
    for (int j=L; j<=n+k; j++) 
      mp[a[i]+a[j]]++;
  
  for (map < int , int > :: iterator it=mp.begin(); it!=mp.end(); ++it) {
    if ((it->second)>=k) 
      check((it->first)/2.0);
  }
}

Compilation message (stderr)

tabletennis.cpp:37:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   37 | main() {
      |      ^

• Subtask 1: 0 / 11
• Subtask 2: 0 / 9
• Subtask 3: 0 / 14
• Subtask 4: 0 / 15
• Subtask 5: 0 / 9
• Subtask 6: 0 / 14
• Subtask 7: 0 / 15
• Subtask 8: 0 / 13