题目
发现最短路径是\(C_{n}^k + C_{n - 1}^{k - 1} + C_{n - 2}^{k - 2} + \dots + C_{n - k} ^ 0 + n - k\)\(C_{n}^k + C_{n - 1}^{k - 1} + C_{n -
题目
发现最短路径是\(C_{n}^k + C_{n - 1}^{k - 1} + C_{n - 2}^{k - 2} + \dots + C_{n - k} ^ 0 + n - k\)\(C_{n}^k + C_{n - 1}^{k - 1} + C_{n -