230215(수)

function diagonalDifference(arr: number[][]): number {
  // Write your code here
  const leftToRightSum: number = arr
    .map((row, i) => row[i])
    .reduce((acc, cur) => acc + cur);
  const rightToLeftSum: number = arr
    .map((row, i, array) => row[array.length - 1 - i])
    .reduce((acc, cur) => acc + cur);
  return Math.abs(leftToRightSum - rightToLeftSum);
}

function timeConversion(s: string): string {
  // Write your code here
  let [hh, mm, ssXm]: string[] = s.split(':');
  let [ss, xm] = [ssXm.slice(0, 2), ssXm.slice(2, 4)];
  if (xm.includes('A')) {
    if (hh === '12') hh = '00';
  } else if (xm.includes('P')) {
    if (Number(hh) < 12) hh = String(Number(hh) + 12);
  }
  return [hh, mm, ss].join(':');
}

function kangaroo(x1: number, v1: number, x2: number, v2: number): string {
  // Write your code here
  if (v1 === v2) {
    return x1 === x2 ? 'YES' : 'NO';
  }
  const jumpCount = (x1 - x2) / (v2 - v1);
  return jumpCount > 0 && jumpCount === Math.floor(jumpCount) ? 'YES' : 'NO';
}

function saveThePrisoner(n: number, m: number, s: number): number {
  // Write your code here
  const warnNumber = ((m % n) + s - 1) % n;
  if (warnNumber === 0) return n;
  return warnNumber;
}