#include<stdio.h>
int main()
{
    double balance;
    int n;
    double t;
    scanf("%lf",&balance);
    scanf("%d",&n);
    for(int i=0;i<n;i++){
    scanf("%lf,&t");
    balance+=t;
    Update blance using+=operator
    }
    printf("%lf\n",balance);
    return 0;
}