Submission #687526

#	Time	Username	Problem	Language	Result	Execution time	Memory
687526		vlad_TT	Table Tennis (info1cup20_tabletennis)	C++17	29 / 100	157 ms	22608 KiB

tabletennis

///solutie rares
#include <iostream>
#include <algorithm>
#include <unordered_map>
#include <vector>

using namespace std;
long long v[150405];
unordered_map <long long,long long> f;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n,k,suma;
    cin>>n>>k;
    for(int i=1;i<=n+k;i++)
    {
        cin>>v[i];
        f[v[i]]+=1;
    }
    if (n + k <= 18) {
      for (int mask = 1; mask < (1 << (n + k)); mask++) {
        if (__builtin_popcount(mask) == n) {
          vector<int> pos;
          for (int bit = 0; bit < n + k; bit++) {
            if (mask & (1 << bit)) pos.push_back(v[bit + 1]);
          }
          bool ok = 1;
          for (int i = 1; i < (n / 2); i++) {
            if (pos[i] + pos[n - i - 1] != pos[0] + pos[n - 1]) {
              ok = false;
            }
          }
          if (ok) {
            for (auto &it : pos) {
              cout << it << " ";
            }
            return 0;
          }
        }
      }
    }
    ///cazul in care nu eliminam nici 1, nici n+k
    ///sort(v+1,v+k+n);
    suma=v[1]+v[n+k];
    int eliminat,cnteliminat=0;
    ///cout<<"suma="<<suma<<"\n";
    for(int i=2;i<n+k;i++)
    {
        if(f[suma-v[i]]==0||v[i]*2==suma)
        {
            cnteliminat++;
            ///cout<<"nu merge "<<v[i]<<"\n";
            eliminat=v[i];
        }
    }
    if(cnteliminat==1)
    {
        for(int i=1;i<=n+k;i++)
        {
            if(f[suma-v[i]]==1&&v[i]*2!=suma)
            cout<<v[i]<<" ";
        }
    }
    else
    {
        ///eliminam pe primul numar
        cnteliminat=0;
        suma=v[2]+v[n+k];
        for(int i=2;i<n+k;i++)
        {
            if(f[suma-v[i]]==0||v[i]*2==suma)
            {
                cnteliminat++;
                ///cout<<"nu merge "<<v[i]<<"\n";
                eliminat=v[i];
            }
        }
        if(cnteliminat==0)
        {
            for(int i=2;i<=n+k;i++)
                cout<<v[i]<<" ";
        }
        else
        {
            for(int i=1;i<n+k;i++)
                cout<<v[i]<<" ";
        }
    }
    return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:47:9: warning: variable 'eliminat' set but not used [-Wunused-but-set-variable]
   47 |     int eliminat,cnteliminat=0;
      |         ^~~~~~~~

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