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- #include<bits/stdc++.h>
- #include <algorithm>
- #define lli long long int
- #define li long int
- #define mod 1000000007
- #define ld long double
- #define pb push_back
- using namespace std;
- int main(){
- ios_base::sync_with_stdio(false);
- cin.tie(NULL);
- int n;
- cin>>n;
- int arr[n];
- for (int i = 0; i < n; i++)
- {
- cin>>arr[i];
- }
- int k;
- cin>>k;
- vector<pair<int,int> > vec;
- for (int i = 0; i < n; i++)
- {
- for (int j = 0; j < n && j!=i; j++)
- {
- if(arr[i]+arr[j]==k){
- vec.push_back(make_pair(arr[i],arr[j]));
- }
- }
- }
- for (int i = 0; i < vec.size(); i++)
- {
- cout<<vec[i].first<<" "<<vec[i].second<<endl;
- }
- return 0;
- }
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