#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; i++){
            long long m = N-i;
            for(int j = 1; j <= i; j++){
                transaction(m);
            }
        }
    }
}
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