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Python | Minimum Sum of Consecutive Characters

  • Last Updated : 30 Jan, 2020

Sometimes, we might have a problem in which we require to get the minimum sum of 2 numbers from list but with a constraint of having the numbers in successions. This type of problem can occur while competitive programming. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using min() + zip() + list comprehension
This problem can be solved using the combination of above three function in which min function can be used to get the minimum value, zip and list comprehension doing the task of extending the logic to the whole list.




# Python3 code to demonstrate
# Minimum Sum of Consecutive Characters
# using zip() + min() + list comprehension
  
# initializing string 
test_string = '6543452345456987653234'
  
# printing original string 
print("The original string : " + str(test_string))
  
# using zip() + min() + list comprehension
# Minimum Sum of Consecutive Characters
test_string = list(test_string)
res = min(int(a) + int(b) for a, b in zip(test_string, test_string[1:]))
  
# print result
print("The minimum consecutive sum is : " + str(res))
Output :
The original string : 6543452345456987653234
The minimum consecutive sum is : 5

 

Method #2 : Using min() + map() + operator.add
The above problem can also be solved using yet another combination of functions. In this combination, map functions performs the task of extending the logic to whole list and add operator is used to perform the multiplication.




# Python3 code to demonstrate
# Minimum Sum of Consecutive Characters
# using min() + map() + operator.add
from operator import add
  
# initializing string 
test_string = '6543452345456987653234'
  
# printing original string 
print("The original string : " + str(test_string))
  
# using min() + map() + operator.add
# Minimum Sum of Consecutive Characters
res = min(map(add, map(int, test_string), map(int, test_string[1:])))
  
# print result
print("The minimum consecutive sum is : " + str(res))
Output :
The original string : 6543452345456987653234
The minimum consecutive sum is : 5


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