#include <stdio.h>
int main(){
    double balance;
    int n;
    scanf("%1f",&balance);
    scanf("%d",&n);
    for(int i=0;i<n;i++){
    double amt;
    scanf("%1f",&amt);
    balance+=amt;
}
printf("%.2f\n",balance);
return 0;
}
    
    
;

    
    
}