#include "souvenirs.h"
#include <bits/stdc++.h>
using namespace std;
void buy_souvenirs(int n, long long P0){
    if(n==2){
        transaction(P0-1);
    }else {
        for(int i = 0; i < n-1; i++){
            int m = n-i-1;
            for(int j = 0; j <= i; j++){
                transaction(m);
            }
        }
    }
}
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