#include<stdio.h>
int main(){
    float initial_balance;
    int num transaction;
    scanf("%.2f\n",&initial balance);
    scanf("%d\n",&num transaction);
    for(int i=0;i<num transaction;i++){
        float transaction amount;
        scanf("%f\n",&transaction amount);
        initial balance+=transaction amount;
    }
    printf("%2f\n",initial amount);
    return 0;
}