枚举组合,在不考虑连续的情况下推断能否够覆盖L...R,对随机数据是一个非常大的减枝. 通过检測的暴力计算一遍 ZCC loves cards Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1346    Accepted Submission(s): 335 Problem Description ZCC loves playing