Submission #674459

#	Time	Username	Problem	Language	Result	Execution time	Memory
674459		QwertyPi	Table Tennis (info1cup20_tabletennis)	C++14	100 / 100	2941 ms	15152 KiB

tabletennis

#include <bits/stdc++.h>

using namespace std;

int n, k; 
int a[150401];

void gen(int x){
	vector<int> Fr, Ba;
	int l = 0, r = n + k - 1;
	while(l < r){
		if(a[l] + a[r] == x) { Fr.push_back(l); Ba.push_back(r); l++; r--; }
		else if(a[l] + a[r] > x) r--;
		else l++;
	}
	reverse(Ba.begin(), Ba.end());
	for(auto i : Fr) cout << a[i] << ' ';
	for(auto i : Ba) cout << a[i] << ' ';
}

unordered_map<int, int> M;

int main(){
	cin.tie(0); cout.tie(0)->sync_with_stdio(false);
	cin >> n >> k;
	for(int i = 0; i < n + k; i++){
		cin >> a[i];
	}
	vector<int> v;
	for(int i = 0; i <= k; i++){
		for(int j = max(i + 1, n + k - 1 - i - k); j <= min(n + k - 1, n + k - 1 - i + k); j++){
			M[a[i] + a[j]]++;
		}
	}
	for(int i = k + 1; i < n + k; i++){
		for(int j = max(i + 1, n + k - 1 - i - k); j <= min(n + k - 1, n + k - 1 - i + k); j++){
			if(M.count(a[i] + a[j])) M[a[i] + a[j]]++;
		}
	}
	for(auto m : M){
		if(m.second == n / 2){
			gen(m.first);
			return 0;
		}
	}
}

• 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