7 lines
313 B
Python
Executable file
7 lines
313 B
Python
Executable file
#!/usr/bin/env python3
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with open('HINHVUONG.INP') as fi, open('HINHVUONG.OUT', 'w') as fo:
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A, B, C, D = sorted([int(i) for i in s.split()] for s in fi.readlines())
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if A[0] != B[0] or C[0] != D[0] or A[1] != C[1] or B[1] != D[1]:
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fo.write('-1\n')
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else:
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print((B[0]-C[0]) ** 2, file=fo)
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