Delete Columns to Make Sorted

Delete Columns to Make Sorted.js

// https://leetcode.com/problems/delete-columns-to-make-sorted/description/

function minDels(arr) {
  let count = 0;
  const numCols = arr[0].length;
  
  for(let x=numCols-1;x>=0;x--) {
    for(let y=1;y<arr.length;y++) {
      if(arr[y][x] < arr[y-1][x]) {
        count++;
        break;
      }
    }
  }
  
  return count;
}

console.log(minDels(["cba","daf","ghi"])); //1
console.log(minDels(["a","b"])); //0
console.log(minDels(["zyx","wvu","tsr"])); //3