#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
extern pair<vector<int>, long long> transaction(long long M);
void buy_souvenirs(int N, long long P0) {
    vector<int> ans(N, 0);
    if (N == 2) {
        auto [gotten, change] = transaction(P0 - 1);
        for (int i : gotten) 
          ans[i]++;
    }
    else if (N == 3) {
        while (ans[1] < 1 || ans[2] < 1) {
            auto [gotten, change] = transaction(P0 - 1);
            for (int i : gotten) 
              ans[i]++;
        }
    }
}
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