Problem Name - Delete Columns to Make Sorted

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

/**
 * @param {string[]} strs
 * @return {number}
 */
var minDeletionSize = function(strs) {
    const rows = strs.length;
    const cols = strs[0].length;
    let ans=0;

    // traversing column wise and counting the columns to be deleted
    for(let j=0;j<cols;j++){
        for(let i=1;i<rows;i++){
            if(strs[i][j]<strs[i-1][j]){
                ans++;
                break;
            }
        }
    }
    return ans;
};