#include<bits/stdc++.h>

using namespace std;

int main(){
    int L, M, N, ans = 0; cin >> L >> M >> N;
    int money = L*100 + M*25 + N;
    
    while(1){
        if(money >= 1000){
            money -= 1000;
            ans++;
        }else if(money >= 100){
            money -= 100;
            ans++;
        }else if(money >= 25){
            money -= 25;
            break;
        }else{
            ans += money;
            break;
        }
    }
    cout << ans << endl;
}