Submission #1001119

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001119		kachim2	Table Tennis (info1cup20_tabletennis)	C++17	9 / 100	3059 ms	5384 KiB

tabletennis

#include <algorithm>
#include <bits/stdc++.h>
#include <cstdint>
#include <numeric>
#include <vector>
using namespace std;
vector<pair<int, int>> res; 
vector<pair<int, int>> &check_balanced(vector<int> in, int val) {
  
  res.resize(0);
  int j = in.size()-1;
  for (int i = 0; i < j; i++){
    while(in[i]+in[j]>val) j--;
    if(in[i]+in[j]==val) res.push_back({in[i], in[j]});
  }
  
  return res;

}
int main() {
  int N, K;
  cin >> N >> K;
  vector<int> input(N+K);
  for(int i = 0; i < N+K; i++){
    cin >> input[i];
  }
  long insum = accumulate(input.begin(), input.end(), 0);
  sort(input.begin(), input.end());
  for(int i = 0; i <= K; i++){
    for(int j = 0; j + i <= K; j++){
      const int sp = N+K-j-1;
      if((N/2)*(input[i]+input[sp]) > insum) continue;
      auto a = check_balanced(input, input[i]+input[sp]);
      	if(a.size()>=N/2){
	  vector<int> out;
	  for(auto i : a){
	    out.push_back(i.first);
	    out.push_back(i.second);
	  }
	  sort(out.begin(), out.end());
	  for(int i = 0; i < N; i++){
	    cout << out[i] <<' ';
	  }
	  return 0;
	}
    }
  }
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:34:19: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   34 |        if(a.size()>=N/2){
      |           ~~~~~~~~^~~~~

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