[Project Euler] Problem 15
Starting in the top left corner of a 2
2 grid, there are 6 routes (without backtracking) to the bottom right corner.
How many routes are there through a 2020 grid?
这道题算是中学时的排列组合结果为40!/(20!*20!) = 137846528820
也甭编程了
Starting in the top left corner of a 22 grid, there are 6 routes (without backtracking) to the bottom right corner.
How many routes are there through a 2020 grid?
这道题算是中学时的排列组合结果为40!/(20!*20!) = 137846528820
也甭编程了
