// editor2
#include<stdio.h>
int main()
{
    float initial;
    int num1;
    float trans1;
    float trans2;
    float trans3;
    
    scanf("%f",&initial);
    scanf("%d",&num1);
    scanf("%f",trans1);
    scanf("%f",trans2);
    scanf("%f",trans3);
     
     float total=initial+trans1-trans2+trans3;
     printf("%.2f",&total);
 
 
}