#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int,int>;
#define rep2(i,a,n) for(int i = (a);i < (n);i++)
#define rep(i,n) rep2(i,0,n)
#define INF (1LL << 60)

int main(void){
    int l,m,n;
    cin >> l >> m >> n;
    if(n >= 25){
        m += (n / 25);
        n %= 25;
    }
    if(m >= 4){
        l += (m / 4);
        m %= 4;
    }
    
    cout << (l/10)+(l%10)+m+n << endl;
}