A massive ad fraud and click fraud operation dubbed SlopAds ran a cluster of 224 apps, collectively attracting 38 million downloads across 228 countries and territories. "These apps deliver their ...

Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0. Assume the environment ...

You have a starting number. In each step, you take away a chunk that looks like “a power of two plus num2.” After some steps, what’s left should exactly match a mix of powers of two. So we test step ...