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def solution(A):
    # write your code in Python 2.7
    diffs = []
    sum_a = 0
    for i in  range(len(A)):
        sum_a += A[i]
        
    sum_b = 0
    for i in  range(0, len(A)-1):
        sum_b += A[i]

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import math

def solution(X, Y, D):
    if D < 0:
        return 0
    steps = math.ceil((abs(Y-X)) / float(D))
    print steps
    steps = int(steps)
    return steps

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# you can use print for debugging purposes, e.g.
# print "this is a debug message"

def solution(A):
    m = len(A) + 1
    expected_sum = (m * (m+1)) / 2
    return expected_sum - sum(A)

# https://codility.com/demo/results/demo4C4YQX-MX2/
# O(N) or O(N * log(N))

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# you can use print for debugging purposes, e.g.
# print "this is a debug message"

def solution(X, A):

    if len(A) <= 0 or X <= 0:
        return -1

    d = dict(zip(range(1, X+1), [0] * (X+1)))

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# you can use print for debugging purposes, e.g.
# print "this is a debug message"
def solution(A):
    d = dict(zip(range(1, len(A) + 1), [0] * (len(A) + 1) ))
    result = 0
    for i in A:
        if i in d:
            d.pop(i)
        if not d:
            result = 1

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def solution(A):
    d = {}
    result = 0
    for i in range(len(A)):
        if A[i] not in d and A[i] >= 1:
            d[A[i]] = 0  
    j = 1
    while j <= 100010:
        if not j in d:
            result = j

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#!/usr/bin/env python


def solution(N, A):
    counters = [0] * N
    max_counter = 0
    all_inc = 0
    N1 = N + 1

    for i in range(len(A)):

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#https://codility.com/demo/results/demoRPXRJY-QA4/
def solution(A, B, K):
    result = B // K - A // K
    if A % K == 0: # Additional one
        result += 1
    return result

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# https://codility.com/demo/results/demoHUQZ5G-SSR/
def solution(A):
    if len(A) <= 0:
        return -1
    result = 0
    multiplier = 0
    for i in range(len(A)):
        if A[i] == 0:
            multiplier += 1
        else:

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I hereby claim:

  * I am arastogi19 on github.
  * I am halite (https://keybase.io/halite) on keybase.
  * I have a public key ASCLQWEfIXRfxPeuS6LzN6jRO5MSU-BEtV7iCp6nb09fFQo

To claim this, I am signing this object: