a,b,c=map(int,input().split()) M = 0 for i in range(1,a+1): for j in range(1,b+1): for k in range(1,c+1): if max((i,j,k)) < sum((i,j,k)) - max((i,j,k)): if i+j+k > M: M = i+j+k print(M)