#include "aplusb.h"
#include <bits/stdc++.h>
using namespace std;
#define threesum cin.tie(NULL); cout.tie(NULL); ios_base::sync_with_stdio(false)
#define all(a) a.begin(), a.end()
#define F first
#define S second
//#define int long long
#define pii pair<int, int>
#define ppp pair<int, pii>
#define dout cout << fixed << setprecision(15)
#define mid ((l + r) / 2)
#define lc (2 * id)
#define rc (lc + 1)
vector<int> smallest_sums(int N, vector<int> A, vector<int> B) {
//return A;
sort(all(A));
sort(all(B));
map<pii, bool> seen;
priority_queue<ppp> pq;
pq.push({A[0] + B[0], {0, 0}});
vector<int> ans;
while((int)ans.size() < N){
auto [dst, pr] = pq.top();
auto [i, j] = pr;
pq.pop();
if(seen[{i, j}])
continue;
seen[{i, j}] = 1;
ans.push_back(A[i] + B[j]);
if(i + 1 < N)
pq.push({-(A[i + 1] + B[j]), {i + 1, j}});
if(j + 1 < N)
pq.push({-(A[i] + B[j + 1]), {i, j + 1}});
}
return ans;
}
