0944-delete-columns-to-make-sorted.js

/**
 * 944. Delete Columns to Make Sorted
 * https://leetcode.com/problems/delete-columns-to-make-sorted/
 * Difficulty: Easy
 *
 * You are given an array of n strings strs, all of the same length.
 *
 * The strings can be arranged such that there is one on each line, making a grid.
 *
 * For example, strs = ["abc", "bce", "cae"] can be arranged as follows:
 * - abc
 * - bce
 * - cae
 *
 * You want to delete the columns that are not sorted lexicographically. In the above
 * example (0-indexed), columns 0 ('a', 'b', 'c') and 2 ('c', 'e', 'e') are sorted,
 * while column 1 ('b', 'c', 'a') is not, so you would delete column 1.
 *
 * Return the number of columns that you will delete.
 */

/**
 * @param {string[]} strs
 * @return {number}
 */
var minDeletionSize = function(strs) {
  let result = 0;

  for (let col = 0; col < strs[0].length; col++) {
    for (let row = 1; row < strs.length; row++) {
      if (strs[row][col] < strs[row - 1][col]) {
        result++;
        break;
      }
    }
  }

  return result;
};