Submission #523400

#	Time	Username	Problem	Language	Result	Execution time	Memory
523400		Ahmed2me	Table Tennis (info1cup20_tabletennis)	C++17	100 / 100	366 ms	33792 KiB

tabletennis

#include <bits/stdc++.h>

using namespace std;

int n,m;
int a[200020];

int main()
{
    scanf("%d",&n);scanf("%d",&m);map<int,int>mp;
    for(int i=1;i<=n+m;i++){scanf("%d",&a[i]);}
    if(n <= 4 * m)
    {
      for(int i = 1; i <= n + m; ++i){
          for(int j = i + 1; j <= n + m; ++j){
            {
      int sum=a[i]+a[j];
      int i=1,j=n+m;
	  vector<int>ans;
      int counter=false;
      while(i<j)
      {
          if(counter>=n){break;}
          if(a[i]+a[j]==sum){counter+=2;ans.push_back(a[i]);ans.push_back(a[j]);i++;j--;}
          else if(a[i]+a[j]>sum){j--;}
          else if(a[i]+a[j]<sum){i++;}
      }
      if(counter==n)
      {
        sort(ans.begin(),ans.end());
        for(int i=0;i<ans.size();i++){printf("%d%c",ans[i],' ');} 
        return 0;
      }
    }
          }
      }
      return 0;
    }
    for(int i=1;i<=min(n,2*m);i++)
    {
        for(int j=max(1,(n-m+1));j<=n+m;j++)
        {
            mp[(a[i]+a[j])]++;
        }
    }
    for(auto I:mp)
    {
      if(I.second<m){continue;}
      int sum=I.first;
      int i=1,j=n+m;
	  vector<int>ans;
      int counter=false;
      while(i<j)
      {
          if(counter>=n){break;}
          if(a[i]+a[j]==sum){counter+=2;ans.push_back(a[i]);ans.push_back(a[j]);i++;j--;}
          else if(a[i]+a[j]>sum){j--;}
          else if(a[i]+a[j]<sum){i++;}
      }
      if(counter==n)
      {
        sort(ans.begin(),ans.end());
        for(int i=0;i<ans.size();i++){printf("%d%c",ans[i],' ');} 
        return 0;
      }
    }
  return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:31:22: 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<ans.size();i++){printf("%d%c",ans[i],' ');}
      |                     ~^~~~~~~~~~~
tabletennis.cpp:63:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |         for(int i=0;i<ans.size();i++){printf("%d%c",ans[i],' ');}
      |                     ~^~~~~~~~~~~
tabletennis.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d",&n);scanf("%d",&m);map<int,int>mp;
      |     ~~~~~^~~~~~~~~
tabletennis.cpp:10:25: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d",&n);scanf("%d",&m);map<int,int>mp;
      |                    ~~~~~^~~~~~~~~
tabletennis.cpp:11:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     for(int i=1;i<=n+m;i++){scanf("%d",&a[i]);}
      |                             ~~~~~^~~~~~~~~~~~

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