L = int(input()) #100円の枚数
M = int(input()) #25円の枚数
N = int(input()) #1円の枚数

sum = 100*L + 25*M + N

remaind_1000 = divmod(sum, 1000)
remaind_100 = divmod(remaind_1000[1], 100)
remaind_25 = divmod(remaind_100[1], 25)
remaind_1 = remaind_25[1]
coin = remaind_100[0] + remaind_25[0] + remaind_1

print(coin)