#include<bits/stdc++.h>
#include<fstream>
#pragma GCC optimize("Ofast,O3,unroll-loops")
#pragma GCC target("avx2")
using namespace std;
//ifstream fin("FEEDING.INP");
//ofstream fout("FEEDING.OUT");
#define sz(a) (int)a.size()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
const ll mxn = 150005, base = 972663749;
const ll mod = 911382323, mxv = 1e9 + 1;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll rr(ll l, ll r){
return(uniform_int_distribution<ll>(l, r)(rng));
}
int n, k;
int a[mxn + 1];
vt<int>seg;
int check(int v, bool trace = 0){
int l = 1, r = n + k, cnt = 0;
while(l < r){
if(a[l] + a[r] == v){
if(trace && sz(seg) != n){
seg.pb(a[l]); seg.pb(a[r]);
}
cnt++;
l++; r--;
}else if(a[l] + a[r] > v){
r--;
}else{
l++;
}
}
return(cnt);
}
signed main()
{
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n >> k;
for(int i = 1; i <= n + k; i++)cin >> a[i];
sort(a + 1, a + n + k + 1);
for(int tol = 1; tol <= k + 1; tol++){
for(int tor = max(n, tol + 1); tor <= n + k; tor++){
if(check(a[tol] + a[tor]) >= n / 2){
check(a[tol] + a[tor], 1);
break;
}
}
}
sort(seg.begin(), seg.end());
for(auto i: seg){
cout << i << " ";
}
retur
Compilation message
tabletennis.cpp: In function 'int main()':
tabletennis.cpp:66:5: error: 'retur' was not declared in this scope
66 | retur
| ^~~~~
tabletennis.cpp:66:5: error: expected '}' at end of input
tabletennis.cpp:48:1: note: to match this '{'
48 | {
| ^
