/* Problem URL: https://codeforces.com/problemset/problem/1931/F */ #include #include #include using namespace std; using namespace __gnu_pbds; template > using ordered_set = tree; #define V vector #define rmin(a, b) a = min(a, b) #define rmax(a, b) a = max(a, b) #define rep(i, lim) for (int i = 0; i < (lim); i++) #define nrep(i, s, lim) for (int i = s; i < (lim); i++) #define repv(i, v) for (auto &i : (v)) #define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; } #define sortv(v) sort(v.begin(), v.end()) #define all(v) (v).begin(), (v).end() using vi = vector; using vvi = vector; using vvvi = vector; using vvvvi = vector; using ll = long long; using vl = vector; using vvl = vector; using vvvl = vector; using vvvvl = vector; template auto operator<<(ostream &os, const vector &vec)->ostream& { os << vec[0]; for (size_t i = 1; i < vec.size(); i++) { os << ' ' << vec[i]; } os << '\n'; return os; } template auto operator>>(istream &is, vector &vec)->istream& { for (auto &i : vec) { is >> i; } return is; } template auto operator<<(ostream &os, const vector> &vec)->ostream& { for (auto &i : vec) { os << i[0]; for (size_t j = 1; j < i.size(); j++) { os << ' ' << i[j]; } os << '\n'; } return os; } template auto operator>>(istream &is, vector> &vec)->istream& { for (auto &i : vec) { for (auto &j : i) { is >> j; } } return is; } const int oo = INT32_MAX >> 1; const ll OO = INT64_MAX >> 1; void pre() { } #define TEST 1 void solve() { int n, k; cin >> n >> k; vvi p(k, vi(n)); cin >> p; if (n == 1 || k == 1) { cout << "YES\n"; return; } if (k == 2) { int i1 = 1; int i2 = 1; rep(i, n) { if (i1 >= n) { if (p[1][i2] != p[0][0]) { cout << "NO\n"; return; } continue; } if (i2 >= n) { if (p[0][i1] != p[1][0]) { cout << "NO\n"; return; } continue; } if (p[0][i1] == p[1][i2]) { i1++; i2++; continue; } if (p[0][i1] == p[1][0]) { i1++; continue; } if (p[1][i2] == p[0][0]) { i2++; continue; } cout << "NO\n"; return; } cout << "YES\n"; return; } V vis(n + 1); int cur = -1; int next = -1; int eq = n; nrep(i, 1, n) { if (next == -1) { if (p[0][i] == p[1][i] || p[0][i] == p[2][i]) { cur = p[0][i]; } else if (p[1][i] == p[2][i]) { cur = p[1][i]; } else { cout << "NO\n"; return; } } else { cur = next; } next = -1; vis[cur] = true; rep(j, k) { if (p[j][i] != cur) { if (!vis[p[j][0]]) { cout << "NO\n"; return; } if (next != -1 && p[j][i] != next) { cout << "NO\n"; return; } next = p[j][i]; continue; } if (vis[p[j][0]]) { cout << "NO\n"; return; } } } cout << "YES\n"; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); pre(); int t; (TEST && cin >> t) || (t = 1); while (t--) { solve(); } }