Two players play a game with a polynomial with undetermined coefficients
1 + c_1 x + c_2 x^2 + \dots + c_7 x^7 + x^8.
Players, in turn, assign a real number to an undetermined coefficient until all coefficients are determined. The first player wins if the polynomial has no real zeros, and the second player wins if the polynomial has at least one real zero. Find who has the winning strategy.
The best solution was submitted by Ha, Seokmin (하석민, 수리과학과 2017학번). Congratulations!
Here is his solution of problem 2018-23.
Alternative solutions were submitted by 채지석 (수리과학과 2016학번, +3), 권홍 (중앙대 물리학과, +2).