Submission #366250

#	Time	Username	Problem	Language	Result	Execution time	Memory
366250		Ahmad_Hasan	Table Tennis (info1cup20_tabletennis)	C++17	87 / 100	3087 ms	6636 KiB

tabletennis

#include <bits/stdc++.h>
#define int long long
/**
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 |||||||||||||||||||  |||||||||||||||           |||||
 |||||         |||||  |||||     |||||           |||||
 |||||         |||||  |||||     |||||    ||||||||||
AHMED;HASSAN;SAEED;
*/

using namespace std;

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);      cout.tie(0);
    int n,k;
    cin>>n>>k;
    vector<int>v(n+k);

    map<int,int >mp,mp2;
    int nn=n+k;
    for(int i=0;i<nn;i++){
        cin>>v[i];
    }

    vector<vector<pair<int,int> > >pos((k+5)*(k+5));
    vector<int>sums((k+5)*(k+5));
    int cr=0;
    int f=0;
    int crsm;
    for(int i=0;i<nn&&i<k+2&&!f;i++){
        for(int j=nn-1;j>=0&&(nn-1-j)<=k+2-i&&!f;j--){
            int cnt=0;
            crsm=v[i]+v[j];
            for(int k=0;k<nn;k++){
                vector<int>::iterator it2=lower_bound(v.begin(),v.end(),crsm-v[k]);
                if(it2==v.end()||*it2!=crsm-v[k])continue;
                int vl=it2-v.begin();
                if(vl>k){
                    cnt++;
                    if(cnt>=n/2){
                        f=1;
                        break;
                    }

                }
            }
        }
    }
    int mxi=0;
    sums[0]=crsm;
    for(int j=0;j<1;j++){
        if(j<cr-1&&sums[j]==sums[j+1])continue;
        for(int i=0;i<nn;i++){
            vector<int>::iterator it2=lower_bound(v.begin(),v.end(),sums[j]-v[i]);
            if(it2==v.end()||*it2!=sums[j]-v[i])continue;
            int vl=it2-v.begin();
            if(vl>i){
                pos[j].push_back({i,vl});
                if(pos[j].size()>=n/2){
                    f=1;
                    break;
                }

            }
        }
    }
/**
    for(int i=0;i<pos.size();i++){
        for(int j=0;j<pos[i].size();j++){
            cout<<pos[i][j].first<<'-'<<pos[i][j].second<<' ';
        }
        cout<<'\n';
    }
*/
    for(int i=0;i<pos.size();i++)
        if(pos[i].size()>pos[mxi].size())
            mxi=i;
    vector<int>ans(n);
    int l=0,r=n-1;
    for(int i=0;i<pos[mxi].size()&&i<n/2;i++){
        ans[l]=(v[pos[mxi][i].first]);
        ans[r]=(v[pos[mxi][i].second]);
        l++;   r--;
    }
    for(int i=0;i<ans.size();i++)
        cout<<ans[i]<<' ';

    return 0;
}



/**
4 3
100000000000 200000000000 300000000000 400000000000 800000000000 1000000000000 2000000000000

*/

Compilation message (stderr)

tabletennis.cpp: In function 'int32_t main()':
tabletennis.cpp:64:33: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   64 |                 if(pos[j].size()>=n/2){
      |                    ~~~~~~~~~~~~~^~~~~
tabletennis.cpp:80:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |     for(int i=0;i<pos.size();i++)
      |                 ~^~~~~~~~~~~
tabletennis.cpp:85:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |     for(int i=0;i<pos[mxi].size()&&i<n/2;i++){
      |                 ~^~~~~~~~~~~~~~~~
tabletennis.cpp:90:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |     for(int i=0;i<ans.size();i++)
      |                 ~^~~~~~~~~~~
tabletennis.cpp:55:12: warning: 'crsm' may be used uninitialized in this function [-Wmaybe-uninitialized]
   55 |     sums[0]=crsm;

• 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