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error: 'int' undefined near line 1 column 1 error: called from ddd at line 1 column 1
Bona Lee 1500018747240
ans = 1 0 0 0 2 0 0 0 3
Bona Lee 1499940882373
Bona Lee 1499840310756
ans = -1.8000
Bona Lee 1499840053677