#include "bits/stdc++.h"
#include "richest.h"
using namespace std;

#define rep(i,a,b) for(int i=(a);i<(b);++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)x.size()
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;

#ifdef DEBUG
auto& operator<<(auto& os, const pair<auto,auto> &p) {
	return os<<"("<<p.first<<", "<<p.second<<")";
}

auto& operator<<(auto& os, const auto &v) {
	os<<"{";
	for(auto it=begin(v);it!=v.end();++it) {
		if(it!=begin(v)) os<<", ";
		os<<(*it);
	}
	return os<<"}";
}

void dbg_out(auto... x) {
	((cerr<<' '<<x), ...) << endl;
}

#define dbg(x...) cerr<<"("<<#x<<"):", dbg_out(x);
#else
#define dbg(...)
#endif

int solve(vector<int> ind) {
	dbg(ind);
	int n = sz(ind);
	vector<pii> q;
	for(int i=0;i<n;i+=3) {
		if(i+3<=n) {
			q.emplace_back(i, i+1);
			q.emplace_back(i, i+2);
			q.emplace_back(i+1, i+2);
		}
		else if(i+2<=n) 
			q.emplace_back(i, i+1);
	}
	vi a, b;
	for(auto [x, y] : q) {
		a.push_back(ind[x]);
		b.push_back(ind[y]);
	}
	dbg(a, b);
	vi res = ask(a, b);
	dbg(res);
	vi new_ind;
	for(int i=0;i<n;i+=3) {
		if(i+3<=n) {
			auto check = [&](const int index) {
				int num = 0;
				num += res[i] == ind[index];
				num += res[i+1] == ind[index];
				num += res[i+2] == ind[index];
				return num == 2;
			};
			if(check(i)) new_ind.push_back(ind[i]);
			else if(check(i+1)) new_ind.push_back(ind[i+1]);
			else new_ind.push_back(ind[i+2]);
		}
		else if(i+2<=n) 
			new_ind.push_back(res[i]);
		else
			new_ind.push_back(ind[i]);
	}
	// for(auto &x : new_ind)
	// 	x = ind[x];
	dbg(new_ind);
	if(sz(new_ind) == 1) return new_ind[0];
	return solve(new_ind);
}

int richest(int N, int T, int S) {
    vi perm(N);
    iota(all(perm), 0);
    return solve(perm);
}