Submission #423622

#	Time	Username	Problem	Language	Result	Execution time	Memory
423622		jamezzz	Table Tennis (info1cup20_tabletennis)	C++17	49 / 100	3073 ms	10004 KiB

tabletennis

#include <bits/stdc++.h>
using namespace std;

#define sf scanf
#define pf printf
#define pb emplace_back
#define all(x) x.begin(),x.end()

int n,k,v;
vector<int> s,ans;
unordered_map<int,bool> mp;

int main(){
	sf("%d%d",&n,&k);
	n+=k;
	for(int i=0;i<n;++i){
		sf("%d",&v);
		s.push_back(v);
	}
	sort(all(s));
	int res=0;
	for(int i=0;i<=k;++i){
		for(int j=n-(k-i)-1;j<n;++j){
			mp.clear();
			for(int l=i+1;l<j;++l)mp[s[l]]=1;
			int t=s[i]+s[j],take=1;
			for(int l=i+1;l<j;++l){
				if(!mp[s[l]])continue;
				if(mp.count(t-s[l])){
					++take;
					mp[s[l]]=0;
					mp[t-s[l]]=0;
				}
				if(take==(n-k)/2)break;
			}
			if(take==(n-k)/2){ res=t; break; }
		}
		if(res!=0)break;
	}
	mp.clear();
	for(int i=0;i<n;++i)mp[s[i]]=1;
	for(int i=0;i<n;++i){
		if(ans.size()==n-k)break;
		if(!mp[s[i]])continue;
		if(mp.count(res-s[i])){
			ans.pb(s[i]);
			ans.pb(res-s[i]);
			mp[s[i]]=0;
			mp[res-s[i]]=0;
		}
	}
	sort(all(ans));
	for(int x:ans)pf("%d ",x);
	pf("\n");
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:43:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   43 |   if(ans.size()==n-k)break;
      |      ~~~~~~~~~~^~~~~
tabletennis.cpp:14:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  sf("%d%d",&n,&k);
      |    ^
tabletennis.cpp:17:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   sf("%d",&v);
      |     ^

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