#include <stdio.h>
#include <stdlib.h>
#define deschidere(cale,mod,f)\
	if((f=fopen(cale,mod))==NULL){\
   	printf("\nNu se poate deschide %s\n",cale);\
      exit(1);\
      }
int main(){
	FILE *f;
   long long n,d,next;
   deschidere("next.in","rt",f);
   fscanf(f,"%lld %lld",&n,&d);
   fclose(f);
   next=n-n%d+d;
   deschidere("next.out","wt",f);
   fprintf(f,"%lld",next);
   fclose(f);
   return 0;
}