#include <iostream>
using namespace std;

int main() {
    int a,b,c,n=10,k=0;
    cin>>a>>b>>c;
    if (a<n)
    {
        n=n-a;
        k=k+a*300;
    }
    else
    {
        k=k+n*300;
        n=0;
    }
    if (b<n)
    {
        n=n-b;
        k=k+b*350;
    }
    else
    {
        k=k+n*350;
        n=0;
    }
    if (c<n)
    {
        n=n-c;
        k=k+c*400;
    }
    else
    {
        k=k+n*400;
        n=0;
    }
    if (n>0)
        k=-1;
    cout<<k<<endl;
    return 0;
}