import java.util.*;

public class no32 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int hundred = sc.nextInt();
        int tw5 = sc.nextInt();
        int one = sc.nextInt();
        int cnt = 0;
        int keep = 0;
        int sum = 0;
        
        if (one != 0) {
            cnt = one / 25;
            one = one % 25;
        }
        tw5 += cnt;
        cnt = 0;
        
        if(tw5 != 0){
            cnt = tw5 / 25;
            tw5 = tw5 % 25;
        }
        hundred += cnt;
        
        if(hundred != 0){
            cnt = hundred / 10;
            hundred = hundred % 10;
        }
        sum = hundred + tw5 + one;
        
        System.out.println(sum);
    }
}