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array-manipulation.py
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#!/usr/bin/python3
# https://www.hackerrank.com/challenges/crush/problem
# def array_manipulation(n, queries):
# operations_dictionary = [
# [(1, n), 0]
# ]
# max_val = 0
# for a, b, k in queries:
# i = 0
# index = 0
# updated_operations, deleted_operations = [], []
# while i < len(operations_dictionary):
# [(lower, upper), total] = operations_dictionary[i]
# if a <= b < lower <= upper:
# break
# if lower <= a <= b <= upper: # (a & b) In-between lower & upper boundary
# index = i
# deleted_operations.append([(lower, upper), total])
# if a == lower and b == upper:
# updated_operations.append([(lower, upper), total + k])
# max_val = max(max_val, total + k)
# if lower == a and b < upper:
# upper_diff = upper - b
# updated_operations.append([(a, b), total + k])
# updated_operations.append([(upper - upper_diff + 1, upper), total])
# max_val = max(max_val, total + k)
# if lower < a and b == upper:
# lower_diff = a - lower
# updated_operations.append([(lower, lower + lower_diff - 1), total])
# updated_operations.append([(a, b), total + k])
# max_val = max(max_val, total + k)
# if lower < a <= b < upper:
# lower_diff = a - lower
# upper_diff = upper - b
# updated_operations.append([(lower, lower + lower_diff - 1), total])
# updated_operations.append([(a, b), total + k])
# updated_operations.append([(upper - upper_diff + 1, upper), total])
# max_val = max(max_val, total + k)
# # print(i, "SE (a:{}, b: {}) lower: {} | upper {} | total {}".format(a, b, lower, upper, total))
# else: # (a & b) Outside lower & upper boundary
# if lower <= a <= upper < b:
# index = i
# deleted_operations.append([(lower, upper), total])
# if lower == a: # == upper
# updated_operations.append([(lower, upper), total + k])
# max_val = max(max_val, total + k)
# if lower < a <= upper:
# lower_diff = a - lower
# updated_operations.append([(lower, lower + lower_diff - 1), total])
# updated_operations.append([(a, upper), total + k])
# max_val = max(max_val, total + k)
# # print(i, "S (a:{}, b: {}) lower: {} | upper {} | total {}".format(a, b, lower, upper, total))
# if a < lower <= upper < b:
# deleted_operations.append([(lower, upper), total])
# updated_operations.append([(lower, upper), total + k])
# max_val = max(max_val, total + k)
# # print(i, "M (a:{}, b: {}) lower: {} | upper {} | total {}".format(a, b, lower, upper, total))
# if a < lower <= b <= upper:
# deleted_operations.append([(lower, upper), total])
# if lower == b == upper:
# updated_operations.append([(lower, upper), total + k])
# max_val = max(max_val, total + k)
# if lower <= b < upper:
# upper_diff = upper - b
# updated_operations.append([(lower, b), total + k])
# updated_operations.append([(upper - upper_diff + 1, upper), total])
# max_val = max(max_val, total + k)
# # print(i, "E (a:{}, b: {}) lower: {} | upper {} | total {}".format(a, b, lower, upper, total))
# i += 1
# # print('deleted_operations: ', deleted_operations, index)
# # print('updated_operations: ', updated_operations, index)
# del operations_dictionary[index:len(deleted_operations) + index]
# operations_dictionary[index:index] = updated_operations
# # print('operations_dictionary: ', operations_dictionary, max_val)
# return max_val
# def array_manipulation(n, queries):
# operations = [0 for _ in range(n)]
# for a, b, k in queries:
# i = a - 1
# while i < b:
# operations[i] += k
# i += 1
# return max(operations)
from collections import Counter
def array_manipulation(n, queries):
c = Counter()
for a, b, k in queries:
c[a] += k
c[b + 1] -= k
arr_sum = 0
max_sum = 0
for i in sorted(c)[:-1]:
arr_sum += c[i]
max_sum = max(max_sum, arr_sum)
return max_sum
if __name__ == '__main__':
# print(array_manipulation(5, [
# [1, 1, 100],
# [2, 5, 100],
# [3, 4, 100]
# ])) # 200
print(array_manipulation(10, [
[1, 5, 3],
[4, 8, 7],
[6, 9, 1]
])) # 10
# print(array_manipulation(10, [
# [2, 6, 8],
# [3, 5, 7],
# [1, 8, 1],
# [5, 9, 15]
# ])) # 31
# operations_dictionary = [
# [(1, 3), 3],
# [(4, 7), 10],
# [(8, 11), 7],
# [(12, 15), 0]
# ]
'''
Delete
1. (4, 7) -> 10,
2. (8, 11) -> 7
'''
# index = 1
#
# deleted_operations = [
# [(4, 7), 10],
# [(8, 11), 7]
# ]
#
# del operations_dictionary[index:len(deleted_operations) + index]
'''
Append
a = 7
b = 9
k = 4
1. (4, 6) -> 10,
2. (7, 7) -> 14,
3. (8, 9) -> 11,
4. (10, 11) -> 7
'''
# updated_operations = [
# [(4, 6), 10],
# [(7, 7), 14],
# [(8, 9), 11],
# [(10, 11), 7]
# ]
#
# operations_dictionary[index:index] = updated_operations
#
# print(operations_dictionary)
# i = 0
# a = 7
# b = 9
# k = 4
# index = 0
# updated_operations, deleted_operations = [], []
# while i < len(operations_dictionary):
# [(lower, upper), total] = operations_dictionary[i]
# if a <= b < lower <= upper:
# break
# if lower <= a <= b <= upper: # (a & b) In-between lower & upper boundary
# index = i
# deleted_operations.append([(lower, upper), total])
# if a == lower and b == upper:
# updated_operations.append([(lower, upper), total + k])
# if lower == a and b < upper:
# upper_diff = upper - b
# updated_operations.append([(a, b), total + k])
# updated_operations.append([(upper - upper_diff + 1, upper), total])
# if lower < a and b == upper:
# lower_diff = a - lower
# updated_operations.append([(lower, lower + lower_diff - 1), total])
# updated_operations.append([(a, b), total + k])
# if lower < a <= b < upper:
# lower_diff = a - lower
# upper_diff = upper - b
# updated_operations.append([(lower, lower + lower_diff - 1), total])
# updated_operations.append([(a, b), total + k])
# updated_operations.append([(upper - upper_diff + 1, upper), total])
# print(i, "SE (a:{}, b: {}) lower: {} | upper {} | total {}".format(a, b, lower, upper, total))
# else: # (a & b) Outside lower & upper boundary
# if lower <= a <= upper < b:
# index = i
# deleted_operations.append([(lower, upper), total])
# if lower == a == upper:
# updated_operations.append([(lower, upper), total + k])
# if lower < a <= upper:
# lower_diff = a - lower
# updated_operations.append([(lower, lower + lower_diff - 1), total])
# updated_operations.append([(a, upper), total + k])
# print(i, "S (a:{}, b: {}) lower: {} | upper {} | total {}".format(a, b, lower, upper, total))
# if a < lower <= upper < b:
# deleted_operations.append([(lower, upper), total])
# updated_operations.append([(lower, upper), total + k])
# print(i, "M (a:{}, b: {}) lower: {} | upper {} | total {}".format(a, b, lower, upper, total))
# if a < lower <= b <= upper:
# deleted_operations.append([(lower, upper), total])
# if lower == b == upper:
# updated_operations.append([(lower, upper), total + k])
# if lower <= b < upper:
# upper_diff = upper - b
# updated_operations.append([(lower, b), total + k])
# updated_operations.append([(upper - upper_diff + 1, upper), total])
# print(i, "E (a:{}, b: {}) lower: {} | upper {} | total {}".format(a, b, lower, upper, total))
# i += 1
# print('deleted_operations: ', deleted_operations, index)
# print('updated_operations: ', updated_operations, index)