Submission #1066342

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066342		goduadzesaba	Table Tennis (info1cup20_tabletennis)	C++17	100 / 100	170 ms	8904 KiB

tabletennis

#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N=2e5+5,mod=1e9+7;
int n,k,a[N],x,y,sm,ans;
vector <int> v;
map <int,bool> mp;
signed main(){
    ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	srand(time(0));
	cin>>n>>k;
	for (int i=1; i<=n+k; i++)
		cin>>a[i];
	sort(a+1,a+n+k+1);
	while (1){
		x=rand()%(k+1)+1;
		y=rand()%(k+1)+n;
		sm=a[x]+a[y];
		if (mp[sm]) continue;
		mp[sm]=1;
		v.clear();
		x=1; y=n+k; ans=0;
		while (x<y && v.size()<n && v.size()+y-x+1>=n){
			if (a[x]+a[y]<sm){
				x++;
			}
			else if (a[x]+a[y]>sm){
				y--;
			}
			else{
				v.push_back(a[x]);
				v.push_back(a[y]);
				ans++; x++; y--;
			}
		}
		if (ans>=n/2){
			sort(v.begin(),v.end());
			for (int i:v) cout<<i<<" ";
			return 0;
		}
	}
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:24:25: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   24 |   while (x<y && v.size()<n && v.size()+y-x+1>=n){
      |                 ~~~~~~~~^~
tabletennis.cpp:24:45: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare]
   24 |   while (x<y && v.size()<n && v.size()+y-x+1>=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: 13 / 13