Submission #638665

#	Time	Username	Problem	Language	Result	Execution time	Memory
638665		Dec0Dedd	Table Tennis (info1cup20_tabletennis)	C++14	87 / 100	3063 ms	13160 KiB

tabletennis

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
 
using namespace std;
using namespace __gnu_pbds;
 
const int N = 2e5+10;
const int K = 50;
 
int a[N], n, k, sz;
gp_hash_table<int, bool> m;
 
int main() {
   ios_base::sync_with_stdio(0);
   cin.tie(NULL);
   cout.tie(NULL);
 
   cin>>n>>k;
   sz=n+k;
   for (int i=1; i<=sz; ++i) cin>>a[i];
   for (int i=1; i<=sz; ++i) m[a[i]]=true;

   vector<int> x;
   bool ok=false;
   for (int i=1; i<=sz && !ok; ++i) {
      for (int j=sz; j>=sz-k+i-1 && !ok; --j) {
         int num=0, s=a[i]+a[j];
         for (int k=1; k<=sz; ++k) {
            if (2*a[k] == s || m.find(s-a[k]) == m.end()) continue;
            ++num;
         }

         if (num >= n) {
            int p=0;
            for (int k=1; k<=sz; ++k) {
               if (2*a[k] == s || m.find(s-a[k]) == m.end()) continue;
               x.push_back(a[k]), x.push_back(s-a[k]);
               p+=2;
               if (p == n) break;
            }
            ok=true;
            break;
         }
      }
   }

   sort(x.begin(), x.end());
   assert((int)x.size() == n);
   for (auto u : x) cout<<u<<" ";
   cout<<"\n";
}

• 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