给你\(L\le10^6\)，\(x,y\le100\)，要求\(\sum_{lcm(a,b)\leL}\left|ax-by\right|\)。喜闻乐见的推式子：\[\begin{aligned}&\sum_{lcm(a,b)\leL}\left|ax-by\right|\\&=\sum_{d=1}^Ld\sum_{a=1}^{\lfloor\frac{L}{d}\rfloor}\sum_