void solve(){ ll n, x, y; string a, b, c; cin >> n >> x >> y >> a >> b >> c; vector<ll> aunmatch1pos, aunmatch0pos; vector<ll> bunmatch1pos, bunmatch0pos; ll unmatched = 0, matched = 0; for(ll i = 0; i < n; i++){ if( ((a[i]-'0')^(b[i]-'0')) == (c[i]...