#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <unordered_map>
#include <queue>
#include <set>
#include <unordered_set>
#include <complex>
#include <list>
#include <cassert>
#include <chrono>
#include <random>
#include <stack>
#include <iomanip>
#include <fstream>
using namespace std;
#define endl "\n"
#define ll long long
const int INF = 1e9+7;
const int MOD = 1e9+7;
// pair<vector<int>, ll> transaction(ll m);
pair<vector<int>, ll> transaction(int n, ll m){
cout << "Input arr: ";
vector<int> a(n);
for(int i = 0; i < n; i++){
cin >> a[i];
}
cout << "Input r: ";
int r;
cin >> r;
return {a, r};
}
void buy_souvenirs(int n, ll p0){
transaction(n, p0-1);
}
