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Diagonal Difference

  • oulkarshubhu
     + 0 comments

    O(n) typescript solution

    function diagonalDifference(arr: number[][]): number {
    // Write your code here
    let primarySum:number = 0;
    let secoundarySum:number = 0;
    
    for(let i=0; i<arr.length; i++) {
        let lastIndex:number = arr[i].length - 1;
        primarySum += arr[i][i];
        secoundarySum += arr[i][lastIndex - i];
    }
    
    return Math.abs(primarySum - secoundarySum);
}