USACO 2021 December Contest, Gold Problem 2. HILO
USACO 2021 December Contest, Gold Problem 2. HILO Bessie knows a number?x+0.5x+0.5?where?xx?is some integer between?00?to?N,N,?inclusive (1≤N≤2?1051≤N≤2?105). Elsie is trying to guess this number. ...