05. Coins

change = float(input())
coin_counter = 0

while change != 0.00:
    if change - 2.00 >= 0.00:
        coin_counter += 1
        change = round(change - 2.00, 2)
    elif change - 1.00 >= 0.00:
        coin_counter += 1
        change = round(change - 1.00, 2)
    elif change - 0.50 >= 0.00:
        coin_counter += 1
        change = round(change - 0.50, 2)
    elif change - 0.20 >= 0.00:
        coin_counter += 1
        change = round(change - 0.20, 2)
    elif change - 0.10 >= 0.00:
        coin_counter += 1
        change = round(change - 0.10, 2)
    elif change - 0.05 >= 0.00:
        coin_counter += 1
        change = round(change - 0.05, 2)
    elif change - 0.02 >= 0.00:
        coin_counter += 1
        change = round(change - 0.02, 2)
    elif change - 0.01 >= 0.00:
        coin_counter += 1
        change = round(change - 0.01, 2)
    else:
        break

print(coin_counter)