Submission #523367

#	Time	Username	Problem	Language	Result	Execution time	Memory
523367		Ahmed2me	Table Tennis (info1cup20_tabletennis)	C++17	87 / 100	3015 ms	29888 KiB

tabletennis

#include <bits/stdc++.h>
#define ll long long
#define endl '\n'
#define sp ' '

using namespace std;

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

bool good(ll sum)
{
    ll i=1,j=n+m;
    ll 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(ll sum)
{
    ll i=1;ll j=n+m;
    vector<ll>ans;
    ll 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++){cout<<ans[i]<<sp;}
    return;
}

void solve()
{
    cin>>n>>m;
    for(int i=1;i<=n+m;i++){cin>>a[i];}
    set<int>st;sort(a+1,a+n+m+1);
    for(int i=1;i<=min(n,2*m);i++)
    {
        for(int j=max(1ll,(n-m+1));j<=n+m;j++)
        {
            st.insert(a[i]+a[j]);
        }
    }
    for(auto I:st){if(good(I)){print_ans(I);return;}}
}

int main()
{
  ios::sync_with_stdio(NULL);cin.tie(NULL);cout.tie(NULL);
  while(t--){solve();}return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'void print_ans(long long int)':
tabletennis.cpp:36:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for(int i=0;i<ans.size();i++){cout<<ans[i]<<sp;}
      |                 ~^~~~~~~~~~~

• 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