Classifier

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef pair<ll,ll> pll;
typedef vector<bool> vb;
const ll oo = 0x3f3f3f3f3f3f3f3f;
const double eps = 1e-9;
#define sz(c) ll((c).size())
#define all(c) begin(c), end(c)
#define FOR(i,a,b) for (ll i = (a); i < (b); i++)
#define FORD(i,a,b) for (ll i = (b)-1; i >= (a); i--)
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define eb emplace_back
#define xx first
#define yy second
#define has(c,i) ((c).find(i) != end(c))
#define TR(X) ({ if(1) cerr << "TR: " << (#X) << " = " << (X) << endl; })

vector<pair<string,string>> res = {
{"Z0","Z"},
{"Z1","Z"},
{"0Z","Z"},
{"1Z","Z"},
{"0X","X0"},
{"1X","X1"},
{"0Y","Y0"},
{"1Y","Y1"},
{"0AX","A"},
{"1AY","A"},
{"AX","Z"},
{"AY","Z"},
{"0BX","XB"},
{"1BY","YB"},
{"BX","Z"},
{"BY","Z"},
{"Q0","0Q"},
{"Q1","1Q"},
{"QH","C"},
{"QG","BQ"},
{"F","AQ"},
{"C000","000H"},
{"C001","001H"},
{"C010","010H"},
{"C011","011H"},
{"C100","100H"},
{"C101","101H"},
{"C110","110H"},
{"C111","111H"},
{"B00","00G"},
{"B01","01G"},
{"B10","10G"},
{"B11","11G"},
{"A0","0F"},
{"A1","1F"},
{"C0","Z"},
{"C1","Z"},
{"0C","XC"},
{"1C","YC"},
{"ABC","_"},
{"1W","W1"},
{"W","ABC"},
{"0","W0"},
{"111","_"}};

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	cout << sz(res) << endl;
	for (auto p: res) cout << p.xx << " -> " << p.yy << endl;
}

Test 1

Group: 1

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER

Test 3

Group: 3

Verdict: WRONG ANSWER

Test 4

Group: 4

Verdict: WRONG ANSWER