ll@X,@Y,@N,u,v,x,y;rep(N){ll@U,@V;u=U?(U-1)/Y+1:0;v=V?(V-1)/Y+1:0;x=U?(U-1)%Y+1:0,y=V?(V-1)%Y+1:0;wt((u<1|v<1|u==v)?abs(x-y):x+y);}