def jumpingOnClouds(c):
    # Write your code here
    jumps = 0
    i=0
    c_len=len(c)
    while i < c_len - 1:
        j=2
        while j >0:
            if i+j<=c_len-1:
                if c[i+j]==0:
                    i+=j
                    jumps+=1
                    break
                else:
                    j-=1
            else:
                j-=1
    return jumps