#include <stdio.h>#include <stdlib.h>#include <iostream>#include <string.h>using namespace std;int main(void){char a[15],b[15];int x[15],y[15];while( scanf("%s %s",a,b)!=EOF && (strcmp(a,"0") || strcmp(b,"0")) ){memset(x,0,sizeof(x));memset(y,0,sizeof(y));int lena = strlen(a);int lenb = strlen(b);int count = 0;for(int i=0; i<lena; i++)x[lena-i-1] = a[i] - '0';for(int i=0; i<lenb; i++)y[lenb-i-1] = b[i] - '0';for(int i=0; i<max(lena,lenb); i++){x[i] += y[i];}for(int i=0; i<max(lena,lenb); i++){if( x[i]>=10 ){x[i+1]++;x[i] %= 10;count++;}}if( count == 0 )printf("No carry operation.n");elseif( count == 1 )printf("1 carry operation.n");elseprintf("%d carry operations.n",count);}return 0;}
