import sys
def main():
    param = []
    for i in range(3):
        param.append(sys.stdin.readline())
    coin1_be = int(param[2])
    coin25_be = int(param[1])
    coin100_be = int(param[0])
    
    money_total = coin1_be + coin25_be * 25 + coin100_be * 100
    
    coin100_af = (money_total % 1000) // 100
    coin25_af = ((money_total % 1000) % 100) // 25
    coin1_af = ((money_total % 1000) % 100) % 25
    
    print(coin100_af + coin25_af + coin1_af)

if __name__ == "__main__":
    main()