This documentation is automatically generated by online-judge-tools/verification-helper
View the Project on GitHub Rin204/Library-Python
# verification-helper: PROBLEM https://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=CGL_4_A&lang=ja from pathlib import Path import sys sys.path.append(str(Path(__file__).resolve().parent.parent.parent.parent)) def convex_hull(xy, multi=False): xy.sort(key=lambda x: (x[1], x[0])) res = [] def cross3(a, b, c): return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]) if multi: def f(a, b, c): return cross3(a, b, c) > 0 else: def f(a, b, c): return cross3(a, b, c) >= 0 for p in xy: while len(res) > 1 and f(res[-1], res[-2], p): res.pop() res.append(p) le = len(res) for p in xy[::-1][1:]: while len(res) > le and f(res[-1], res[-2], p): res.pop() res.append(p) res.pop() return res n = int(input()) xy = [list(map(int, input().split())) for _ in range(n)] res = convex_hull(xy, True) print(len(res)) for x, y in res: print(x, y)
Traceback (most recent call last): File "/opt/hostedtoolcache/Python/3.11.4/x64/lib/python3.11/site-packages/onlinejudge_verify/documentation/build.py", line 81, in _render_source_code_stat bundled_code = language.bundle( ^^^^^^^^^^^^^^^^ File "/opt/hostedtoolcache/Python/3.11.4/x64/lib/python3.11/site-packages/onlinejudge_verify/languages/python.py", line 108, in bundle raise NotImplementedError NotImplementedError