珍爱生命，远离打表

include <stdio.h>

int main() {

int n,m,t=0,y;
scanf("%d%d",&n,&m);
while(n>=m)
{
	y=n%m;
	t=t+n-y;
	n=n/m+y;
}
t=t+n;
if(m-n==1)
{
	t++; 
}
printf("%d",t);
return 0;

}