#include<stdio.h> int main() { int a,b,c,d,e; scanf("%d %d",&a,&b); c=a+b; d=c/10%10;//也可写成:d=c%100/10; e=c%10; if(d==0) printf("%d",e); else printf("%d%d",d,e);//规范写法应该为:printf("%d",10*d+e); return 0; }