Submission #523381

#	Time	Username	Problem	Language	Result	Execution time	Memory
523381		Ahmed2me	Table Tennis (info1cup20_tabletennis)	C++17	87 / 100	3082 ms	37548 KiB

tabletennis

#include <bits/stdc++.h>

using namespace std;

int t=1,n,m;
int a[200020];

bool good(int sum)
{
    int i=1,j=n+m;
    int cnt=false;
    while(i<j)
    {
        if(a[i]+a[j]==sum){cnt++;i++;j--;continue;}
        if(a[i]+a[j]>sum){j--;continue;}
        if(a[i]+a[j]<sum){i++;continue;}
    }
    return cnt>=(n/2);
}

void print_ans(int sum)
{
    int i=1;int j=n+m;
    vector<int>ans;
    int counter=false;
    while(i<j)
    {
        if(counter>=(n/2)){break;}
        if(a[i]+a[j]==sum){counter++;ans.push_back(a[i]);ans.push_back(a[j]);i++;j--;continue;}
        if(a[i]+a[j]>sum){j--;continue;}
        if(a[i]+a[j]<sum){i++;continue;}
    }
    sort(ans.begin(),ans.end());
    for(int i=0;i<ans.size();i++){printf("%d%c",ans[i],' ');}
    return;
}

void solve()
{
    scanf("%d",&n);scanf("%d",&m);map<long long,bool>mp;
    for(int i=1;i<=n+m;i++){scanf("%d",&a[i]);}
    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])]=true;
        }
    }
    for(auto I:mp){if(good(I.first)){print_ans(I.first);return;}}
}

int main()
{
  while(t--){solve();}return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'void print_ans(int)':
tabletennis.cpp:34:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(int i=0;i<ans.size();i++){printf("%d%c",ans[i],' ');}
      |                 ~^~~~~~~~~~~
tabletennis.cpp: In function 'void solve()':
tabletennis.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |     scanf("%d",&n);scanf("%d",&m);map<long long,bool>mp;
      |     ~~~~~^~~~~~~~~
tabletennis.cpp:40:25: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |     scanf("%d",&n);scanf("%d",&m);map<long long,bool>mp;
      |                    ~~~~~^~~~~~~~~
tabletennis.cpp:41:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |     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: 0 / 13