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  1. Prepare
  2. Algorithms
  3. Implementation
  4. Viral Advertising
  5. Discussions

Viral Advertising

  • micahbales
     + 1 comment

    Very cool. Here's my non-recursive JavaScript solution:

    const halfRoundedDown = (num) => Math.floor(num / 2);

function viralAdvertising(n) {
    let totalLikes = 2;
    let lastLikes = 2;
    while (n > 1) {
        lastLikes = halfRoundedDown(lastLikes * 3);
        totalLikes += lastLikes;
        n--;
    }
    return totalLikes;
}