All files / leetCode 0202.ts

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39x
 
39x
71x
71x
 
 
39x
 
 
 
3x
3x
 
3x
13x
13x
 
 
3x
2x
 
1x
 
 
function squareNum(n: number): number {
  let sum = 0
 
  while (n) {
    sum += (n % 10) * (n % 10)
    n = Math.floor(n / 10)
  }
 
  return sum
}
 
export default function isHappy(n: number): boolean {
  let slow = n
  let fast = n
 
  do {
    slow = squareNum(slow)
    fast = squareNum(squareNum(fast))
  } while (slow !== fast)
 
  if (slow === 1)
    return true
  else
    return false
}