#include <bits/stdc++.h>
using namespace std;
pair<vector<int>, long long> transaction(long long M);
void buy_souvenirs(int N, long long P0){
if(N == 2){
auto pii = transaction(P0-1);
} else if(N == 3){
auto pii = transaction(P0-1);
if(pii.first.size() == 2){
auto p3 = transaction((P0-1-pii.second)/2);
return;
}
auto p = transaction(P0-2-pii.second);
auto p2 = transaction(P0-2-pii.second);
} else{
long long l1 = P0; map<int,int> mp;
for(int i = 1; i < N; i++){
bool tr = false;
for(int j = 0; j < i; j++){
if(mp[N-1] == N-1) return;
if(mp[i] == i) break;
auto pii = transaction(l1-1);
mp[i]++;
if(pii.first.size() == 2){
tr = true;
mp[i+1]++;
}
if(pii.second == 1ll){
tr = true;
}
}
l1--;
if(tr) l1--;
}
}
}
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