Running Comparison

Alice and Bob recently got into running, and decided to compare how much they ran on different days. They each ran for $N$ days — on the $i^{th}$ day, Alice ran $A_i$ meters and Bob ran $B_i$ meters. On each day, - Alice is *unhappy* if Bob ran **strictly more than twice** her distance, and *happy* otherwise. - Similarly, Bob is *unhappy* if Alice ran **strictly more than twice** his distance,