문제 설명 Well met with Fibonacci bigger brother, AKA Tribonacci. As the name may already reveal, it works basically like a Fibonacci, but summing the last 3 (instead of 2) numbers of the sequence to generate the next. And, worse part of it, regrettably I won't get to hear non-native Italian speakers trying to pronounce it :( So, if we are to start our Tribonacci sequence with [1, 1, 1] as a startin..