#include <bits/stdc++.h>
#include "souvenirs.h"
using namespace std;
void buy_souvenirs(int n, long long p0){
    long long cur=p0-1;
    long long a[n]={};
    for(int i=1;i<n;i++){
        int g=1;
        for(int j=0;j<i;j++){
            if(a[i]<i){
                pair<vector<int>,long long> d=transaction(cur);
                a[i]++;
                if(d.second==1||d.first.size()!=1){
                    g=2;
                    if(d.first.size()!=1)a[n-1]++;
                }
            }else break;
        }cur-=g;
    }
}
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