根据青蛙换位游戏，使用回溯法编程实现算法解决换位问题。 在output.txt中给出具体的青蛙跳跃的方案。（给出六只青蛙的位置变化过程）-According transposition frog game, using backtracking algorithm to solve programming problems transposition. Give a specific program in output.txt frog jumping in. (Given the po