def odd_Equivalent(s,n):
     
    count=0
    for i in range(0,n): 
        if (s[i] == '1'): 
            count = count + 1
    return count 
def odd_Equivalent(s, n):
    count = 0
    for i in range(0, n):
       
        if "1" == s[i]:
            count = count + 1
    return count