// A is the input array.
// |A| is the size of the input array.
j = 1
j = 1
m = 0
c = 0
while < |A| {
    if A[i] == A[j]
        c = c + 1
    j = j + 1

    if j > |A|
        if c > m
            m = c
        c = 0
        i = i + 1
        j = i
}
return m