#include<stdio.h>
int main()
{
    float IB;
    int n;
    float t1,t2;
    int d;
    
    scanf("%f", &IB);
    if(n>=0 && n<=10)
    {
        scanf("%d", n);
        scanf("%f", t1);
        scanf("%f", t2);
        scanf("%d", d);
        float t=IB+t1+t2+d;
        printf("%.2f", t);
    }
    
}