Submission #480965

#	Time	Username	Problem	Language	Result	Execution time	Memory
480965		rk42745417	Table Tennis (info1cup20_tabletennis)	C++17	100 / 100	82 ms	4428 KiB

tabletennis

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

#define EmiliaMyWife ios::sync_with_stdio(0); cin.tie(0);
using ll = int64_t;
using uint = uint32_t;
using ull = uint64_t;
using ld = long double;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
const double EPS = 1e-8;
const ll LINF = ll(1e18) + ll(1e15);
static auto LamyIsCute = []() {
	EmiliaMyWife
	return 48763;
}();

signed main() {
	int n, k;
	cin >> n >> k;
	vector<int> arr(n + k);
	for(int &x : arr)
		cin >> x;
	const int m = n + k;
	vector<int> ans;
	ans.reserve(n);
	for(int i = 0; i <= k; i++) {
		for(int j = 0; j + i <= k; j++) {
			int s = arr[i] + arr[m - j - 1];
			int rest = k - j - i;
			int l = i, r = m - j - 1;
			while(ans.size() < n && l < r) {
				if(arr[l] + arr[r] == s) {
					ans.push_back(arr[l]);
					ans.push_back(arr[r]);
					l++;
					r--;
				}
				else if(arr[l] + arr[r] > s)
					rest--, r--;
				else
					rest--, l++;
				if(rest < 0)
					break;
			}
			if(ans.size() == n) {
				sort(ans.begin(), ans.end());
				for(int a : ans)
					cout << a << ' ';
				cout << '\n';
				return 0;
			}
			ans.clear();
		}
	}
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:32:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |    while(ans.size() < n && l < r) {
      |          ~~~~~~~~~~~^~~
tabletennis.cpp:46:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   46 |    if(ans.size() == 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