alma = int(input())
barack = int(input())
cserko = int(input())

if alma + barack + cserko < 10:
    print("-1")
    exit()

num = 0
cost = 0

while alma>0:
    if(num == 10):
        print(cost)
        exit()
    num+=1
    alma-=1
    cost+=300


while barack>0:
    if(num == 10):
        print(cost)
        exit()
    num+=1
    barack-=1
    cost+=350
    
while cserko>0:
    if(num == 10):
        print(cost)
        exit()
    num+=1
    cserko-=1
    cost+=400
    
print(cost)