和为S的连续正整数序列|算法专题

    function FindContinuousSequence(sum) {
      const result = [];
      const child = [1, 2];
      let big = 2;
      let small = 1;
      let currentSum = 3;
      while (big < sum) {
        while (currentSum < sum && big < sum) {
          child.push(++big);
          currentSum += big;
        }
        while (currentSum > sum && small < big) {
          child.shift();
          currentSum -= small++;
        }
        if (currentSum === sum && child.length > 1) {
          result.push(child.slice());
          child.push(++big);
          currentSum += big;
        }
      }
      return result;
    }