Keys versus Values - codepath/compsci_guides GitHub Wiki

Unit 2 Session 1 (Click for link to problem statements)

U-nderstand

Understand what the interviewer is asking for by using test cases and questions about the problem.

• Will both the keys and values always be integers?
  • Yes.

P-lan

Plan the solution with appropriate visualizations and pseudocode.

General Idea: Find the sum of all keys, the sum of all values, then print a result based on their comparison.

1) Find the sum of all keys
  a) Create a variable to hold the sum of the keys
  b) Iterate over all keys as a list
  c) Add each key to the sum variable
2) Find the sum of all values in the same way
3) Check which is larger, and print the result accordingly

I-mplement

def keys_v_values(dictionary):
    
    key_sum = 0
    value_sum = 0

    # Calculate the sum of all keys
    for key in dictionary.keys():
      key_sum += key
    
    # Calculate the sum of all values
    for val in dictionary.values()
      value_sum += val
    
    # Determine which sum is greater or if they are equal
    if key_sum > value_sum:
        return "keys"
    elif value_sum > key_sum:
        return "values"
    else:
        return "balanced"