Leetcode Problem 2240. Number of Ways to Buy Pens and Pencils

2240. Number of Ways to Buy Pens and Pencils

Leetcode Solutions

Iterative Calculation of Combinations

  1. Initialize a variable ways to store the total number of ways to buy pens and pencils.
  2. Use a loop to iterate over the number of pens that can be bought, starting from 0 up to the maximum number that can be bought with the given total.
  3. For each iteration, calculate the remaining money after buying the current number of pens.
  4. Calculate the number of pencils that can be bought with the remaining money.
  5. Add the number of ways to buy pencils (including the case of buying 0 pencils) to ways.
  6. Continue the loop until there is not enough money to buy another pen.
  7. Return the total number of ways stored in ways.
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Brute Force Enumeration

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