include stdio int main int int int flag res scanf while res while if 1

#include "stdio.h"

int main()
{
	int x=0;
	int y=0;
	int flag, res=0;
	scanf("%d %d", &x, &y);
	while(x!=0 && y!=0) {
		res = 0;
		while(x!=0 && y!=0) {
			if(x%10+y%10 +flag >9) {
				res=res+1;
				flag = 1;
			}
			else flag = 0;
			x = x/10;
			y = y/10;
		}
		if(res==0) printf("No carry operation.\n");
		else if(res==1) printf("1 carry operation.\n");
		else printf("%d carry operations.\n", res);
		
		scanf("%d %d", &x, &y);		
	}
	return 0;
}