There is no editorial for this problem, but exists few same solution, for instance: https://www.codechef.com/viewsolution/20215651 This greedy solutions as I see for test: 5 2 3 10 8 4 3 3 will give 13*15 = 195. But optimal as I see: 14*14 = 196. Am I right? Does this problem have polynomial solution? asked 18 Sep '18, 14:59
