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强烈建议debug 时直接输出double型,和网上的正确代码对比

Posted by 19980930 at 2017-11-27 00:23:43 on Problem 2502
如题


顺便给出一组数据:
0 0 100 1000
0 0 100 100 100 1000 -1 -1


输出是 2

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