摘要：
http://projecteuler.net/problem=15Starting 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?做出来一个时间复杂度超高的程序： 1 const int MAX_ROW=20; 2 const int MAX_COLUMN=20; 3 long long path=0; 4 void tree(int i 阅读全文
