2008 NPSC D. 輾轉難眠
http://www.tcgs.tc.edu.tw/blog/index.php?op=ViewArticle&articleId=232&blogId=2補完計畫↑( a^m - b^m , a^n - b^n )=( a^m - b^m , a^n - b^n - (a^m - b^m)*a^(n-m) )=( a^m - b^m , - b^n + b^m*a^(n-m) )=( a^m - b^m , b^m*a^(n-m) - b^(n-m)*b^m )=( a^m - b^m , b^m*(a^(n-m) - b^(n-m)) =(...
