#include<stdio.h>
void main(){
    float balance;
    int num;
    float amount;
    float withdrawl;
    float deposit;
    
    scanf("%f",&balance);
    scanf("%d",&num);
    scanf("%f",&amount);
    scanf("%f",&withdrawl);
    scanf("%d",&deposit);
    float final=balance+amount+deposit-withdrawl;
    printf("%f",final);
}