# verification-helper: PROBLEM https://atcoder.jp/contests/abc216/tasks/abc216_d
import cplib/graph/graph
import cplib/graph/topologicalsort
import sequtils, sets
proc scanf(formatstr: cstring){.header: "<stdio.h>", varargs.}
proc ii(): int {.inline.} = scanf("%lld\n", addr result)
var N, M = ii()
var G = initUnWeightedDirectedStaticGraph(N)
for i in 0..<M:
var K = ii()
var A = newseqwith(K, ii())
if len(A.toHashSet) != K:
echo "No"
quit()
for i in 0..<K-1:
G.add_edge(A[i]-1, A[i+1]-1)
G.build()
if G.isDAG():
echo "Yes"
else:
echo "No"
Traceback (most recent call last):
File "/home/runner/.local/lib/python3.12/site-packages/onlinejudge_verify/documentation/build.py", line 71, in _render_source_code_stat
bundled_code = language.bundle(stat.path, basedir=basedir, options={'include_paths': [basedir]}).decode()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/runner/.local/lib/python3.12/site-packages/onlinejudge_verify/languages/nim.py", line 86, in bundle
raise NotImplementedError
NotImplementedError
verify/graph/static/topologicalsort_1_static_test_.nim
cplib/graph/graph.nim