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