This documentation is automatically generated by online-judge-tools/verification-helper
# verification-helper: PROBLEM https://judge.yosupo.jp/problem/shortest_path
from py.graph import Graph
def main():
n, m, s, t = map(int, input().split())
g = Graph(n)
g.read(m, 0, True, True)
dist, prev = g.shortest_path(s, True)
if dist[t] == -1:
exit(print(-1))
route = []
cur = t
while cur != s:
route.append((prev[cur].src, prev[cur].dst))
cur = prev[cur].src
print(dist[t], len(route))
for src, dst in route[::-1]:
print(src, dst)
if __name__ == "__main__":
main()
Traceback (most recent call last):
File "/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/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 "/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/onlinejudge_verify/languages/python.py", line 93, in bundle
raise NotImplementedError
NotImplementedError