import sequtils, strutils
var
    a: seq[int] = mapIt(0..2, stdin.readline.parseInt)
    sum: int = (100 * a[0] + 25 * a[1] + a[2]) mod 1000
    ans: int = 0
ans += sum div 100
sum = sum mod 100
ans += sum div 25 + sum mod 25
echo ans