#include<stdio.h>
int main(){
    float balance,transaction_amount;
    int num_transactions,i;
    scanf("%f",&balance);
    scanf("%d",&num_transactions);
    for(i=0;i<num_transactions;i++){
        scanf("%f",%transactions_amount);
        balance+=transactions_amount;
    }
    print("%2f\n",balance);
    return 0;
    
}