co_100 = int(input())
co_25 = int(input())
co_1 = int(input())
total = 100 * co_100 + 25 * co_25 + co_1

total = total % 1000
ch_100 = total // 100
total -= 100 * ch_100
ch_25 = total // 25
ch_1 = total - 25 * ch_25
print(ch_100 + ch_25 + ch_1)