def minNumberOfOperations(A, N):
ts = sum(A)
    if ts < N:
        return -1
    t = ts - N
    if t == 0:
        return len(A)
    
    ml, l, cs = -1, 0, 0
    
    for r, val in enumerate(A):
        cs += val
        while cs > t:
            cs -= A[l]
            l += 1
        if cs == t:
            ml = max(ml, r - l + 1)
    
    return len(A) - ml if ml != -1 else -1

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