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js-lc-climbstairs·javascript·leetcode

function climbStairs(n) {
  let a = 1, b = 1;
  for (let i = 0; i < n; i++) {
    [a, b] = [b, a + b];
  }
  return a;
}

js-lc-climbstairs·javascript·leetcode

function climbStairs(n) {
  let a = 1, b = 1;
  for (let i = 0; i < n; i++) {
    [a, b] = [b, a + b];
  }
  return a;
}