彩票问题 http://www.ruanyifeng.com/blog/2018/04/lottery-mathematics.html
彩票问题 http://www.ruanyifeng.com/blog/2018/04/lottery-mathematics.html
1.使用caipiao.js的gen函数产生全部4个号码的组合 C(48,4) 组，6个号码的组合 C(48,6) 组。
2.每次从6个号码的组合中选取 12972 个号码， 遍历 4个号码 的组合是否全部包含。
选取组合的时候可以考虑一些优化方案，减少一些计算量。例如:
123 124 125 126 127
134 135 136 137
145 146 147
156 157
167
234 235 236 237
245 246 247
256 257
267
345 346 347
356 357
367
456 457
467
567
每次从 123 124 125 126 127 这些组合中选取一个,再从其他组合选取剩下的。。。
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