水
#include<stdio.h> int swap(int a) { int flag=1,sum; if(a<0){flag=-1;a=-a;} sum=0; while(a%10==0) { a/=10; } while(a) { sum=sum*10+a%10; a/=10; } return flag*sum; } int main() { int i,j,a,b,x,y,t; scanf("%d",&t); while(t--) { scanf("%d%d",&x,&y); a=(x+y)/2; b=(x-y)/2; if(a>9||a<-9)a=swap(a); if(b>9||b<-9)b=swap(b); printf("%d %d\n",a+b,a-b); } return 0; }