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2639. Find the Width of Columns of a Grid

Description

You are given a 0-indexed m x n integer matrix grid. The width of a column is the maximum length of its integers.

• For example, if grid = [[-10], [3], [12]], the width of the only column is 3 since -10 is of length 3.

Return an integer array ans of size n where ans[i] is the width of the ith column.

The length of an integer x with len digits is equal to len if x is non-negative, and len + 1 otherwise.

 

Example 1:

Input: grid = [[1],[22],[333]]
Output: [3]
Explanation: In the 0th column, 333 is of length 3.

Example 2:

Input: grid = [[-15,1,3],[15,7,12],[5,6,-2]]
Output: [3,1,2]
Explanation: 
In the 0th column, only -15 is of length 3.
In the 1st column, all integers are of length 1. 
In the 2nd column, both 12 and -2 are of length 2.

 

Constraints:

• m == grid.length
• n == grid[i].length
• 1 <= m, n <= 100
• -109 <= grid[r][c] <= 109

Solutions

• Java
• C++
• Python
• Go
• TypeScript
• RenderScript

• class Solution {
      public int[] findColumnWidth(int[][] grid) {
          int n = grid[0].length;
          int[] ans = new int[n];
          for (var row : grid) {
              for (int j = 0; j < n; ++j) {
                  int w = String.valueOf(row[j]).length();
                  ans[j] = Math.max(ans[j], w);
              }
          }
          return ans;
      }
  }
  

• class Solution {
  public:
      vector<int> findColumnWidth(vector<vector<int>>& grid) {
          int n = grid[0].size();
          vector<int> ans(n);
          for (auto& row : grid) {
              for (int j = 0; j < n; ++j) {
                  int w = to_string(row[j]).size();
                  ans[j] = max(ans[j], w);
              }
          }
          return ans;
      }
  };
  

• class Solution:
      def findColumnWidth(self, grid: List[List[int]]) -> List[int]:
          ans = [0] * len(grid[0])
          for row in grid:
              for j, x in enumerate(row):
                  w = len(str(x))
                  ans[j] = max(ans[j], w)
          return ans
  
  

• func findColumnWidth(grid [][]int) []int {
  	ans := make([]int, len(grid[0]))
  	for _, row := range grid {
  		for j, x := range row {
  			w := len(strconv.Itoa(x))
  			ans[j] = max(ans[j], w)
  		}
  	}
  	return ans
  }
  

• function findColumnWidth(grid: number[][]): number[] {
      const n = grid[0].length;
      const ans: number[] = new Array(n).fill(0);
      for (const row of grid) {
          for (let j = 0; j < n; ++j) {
              const w: number = String(row[j]).length;
              ans[j] = Math.max(ans[j], w);
          }
      }
      return ans;
  }
  
  

• impl Solution {
      pub fn find_column_width(grid: Vec<Vec<i32>>) -> Vec<i32> {
          let mut ans = vec![0; grid[0].len()];
  
          for row in grid.iter() {
              for (j, num) in row.iter().enumerate() {
                  let width = num.to_string().len() as i32;
                  ans[j] = std::cmp::max(ans[j], width);
              }
          }
  
          ans
      }
  }
  
  

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