#include<stdio.h>
int func(int *num1,int *num2){
    *num1=(*num1+*num2)-(*num2=*num1);
    printf("%d ",*num1);
    pritnf("%d",*num2);
    return 0;
}
int main(){
    int n1,n2;
    scanf("%d",&n1);
    scanf("%d",&n2);
    if(n1<0 || n2<0){
        printf("Invalid Input");
        return 0;
    }
    fun(&n1,&n2);
    return 0;
}