#include <stdio.h>

void sum_and_difference(float a, float b);{
    printf("%.2f\n",a + b);
    printf("%.2f\n",a - b);
}

int main(){
    float a, b;
    scanf("%f",&a);
    scanf("%f",&b);
    
    sum_and_difference(a, b);
    
    return 0;
}