boj_1476

e,s,m = map(int,input().split())

a = []
b = []
finalList = []
for i in range(s,7981,28):
    a.append(i)
for i in range(m,7981,19):
    if i in a:
        b.append(i)
for i in range(e,7981,15):
    if i in b:
        finalList.append(i)
print(finalList[0])

#브루토포스 문제..!!
#나머지 느낌