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HMMT 十一月 2016 · 冲刺赛 · 第 32 题

HMMT November 2016 — Guts Round — Problem 32

专题
Discrete Math / 离散数学
难度
L3
来源
HMMT

题目详情

  1. [ 17 ] Let C denote the number of paths on the Cartesian plane along which you can travel from k,n (0 , 0) to ( k, n ), given the following rules: 1) You can only travel directly upward or directly rightward
解析
  1. [ 17 ] Let C denote the number of paths on the Cartesian plane along which you can travel from k,n (0 , 0) to ( k, n ), given the following rules: 1) You can only travel directly upward or directly rightward