Submission #524774

#	Time	Username	Problem	Language	Result	Execution time	Memory
524774		maks007	Table Tennis (info1cup20_tabletennis)	C++14	35 / 100	3114 ms	679416 KiB

tabletennis

#include <bits/stdc++.h>
 
using namespace std;
 #define break_it assert(false)
int main(void) {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n, k;
	cin >> n >> k;
	vector <int> a(n+k);
	for(int i = 0; i < n +k; i ++) cin >> a[i];
	function <void(int)> check=[&](int sum) {
		vector <int> ans;
		int l = 0, r = n + k - 1;
		while(l < r) {
			if(a[l] + a[r] == sum) {
				
				ans.push_back(a[l]);
				ans.push_back(a[r]);
				l ++;
				r --;
			}else if(a[l] + a[r] > sum) {
				r--;
			}else l ++;
			if(ans.size() == n) break;
		}
		if(ans.size() == n) {
			sort(ans.begin(), ans.end());
			for(auto i : ans) cout << i << " ";
			exit(0);
		}
	};

	/*if(n+k<=18) {
		for(int mask = 0; mask < (1 << (n+k)); mask ++) {	
			if(__builtin_popcount(mask) == n) {
				vector <int> v;
				for(int i = 0; i < n+k; i ++) {
					if((mask & (1 << i))!=0) {
						v.push_back(a[i]);
					}
				}
				if(check(v)) {
					for(int i = 0; i < v.size(); i ++) cout << v[i] << " ";
					return false;
				}
			}
		}
		return false;
	}else if(k == 1) {
		solve(0, n+k-1, 0);
		solve(0, n+k-2, 0);
		solve(1, n+k-1, 0);
	}else {
		for(int i = 0; i < n+k; i ++) {
			vector <int> v;
			for(int j = i; j < n+k; j++) {
				v.push_back(a[j]);
				if(v.size() == n) break;
			}
			if(check(v) and v.size() == n) {
				for(auto i : v) {
					 cout << i << " ";
				}
				return 0;
			}
		}
	}*/
	set <int> sums;
	for(int i = 0; i < (n+k); i ++) {
		for(int j = i + 1; j < n +k; j ++) {
			sums.insert(a[i] + a[j]);
		}
	}
	for(auto i : sums) {
		check(i);
		
	}
	return false;
}  

Compilation message (stderr)

tabletennis.cpp: In lambda function:
tabletennis.cpp:25:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |    if(ans.size() == n) break;
      |       ~~~~~~~~~~~^~~~
tabletennis.cpp:27:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   27 |   if(ans.size() == n) {
      |      ~~~~~~~~~~~^~~~

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