Subarray Sums - Problem Solving (Basic) certification | HackerRank

Solution in Python:


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#!/bin/python3

import math
import os
import random
import re
import sys


#
# Complete the 'findSum' function below.
#
# The function is expected to return a LONG_INTEGER_ARRAY.
# The function accepts following parameters:
#  1. INTEGER_ARRAY numbers
#  2. 2D_INTEGER_ARRAY queries
#

def findSum(numbers, queries):
    a = [0]
    b = [0]
    for x in numbers:
        a.append(a[-1] + x)
        b.append(b[-1] + (x == 0))
    return [a[r] - a[l - 1] + x * (b[r] - b[l - 1]) for l, r, x in queries]
    
if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    numbers_count = int(input().strip())

    numbers = []

    for _ in range(numbers_count):
        numbers_item = int(input().strip())
        numbers.append(numbers_item)

    queries_rows = int(input().strip())
    queries_columns = int(input().strip())

    queries = []

    for _ in range(queries_rows):
        queries.append(list(map(int, input().rstrip().split())))

    result = findSum(numbers, queries)

    fptr.write('\n'.join(map(str, result)))
    fptr.write('\n')

    fptr.close()
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