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많은 것을 추가했다. 하지만 선분의 길이(17386)은 왜 틀린건지 모르겠다. CCW를 해야될것 같다.

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yenru0
2020-08-06 16:32:40 +09:00
parent f74f3c4ec7
commit 99c9db415d
6 changed files with 70 additions and 0 deletions
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zeta_python/completed/2166.py Normal file
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N = int(input())
points = [list(map(int, input().split())) for i in range(N)]
points += [points[0]]
N +=1
print("%.1f" % (abs(sum(points[i][0] * points[j][1] for i, j in zip(range(N - 1), range(1, N))) - sum(points[j][0] * points[i][1] for i, j in zip(range(N - 1), range(1, N))))/2))