Chances of getting in KAIST

So I wish to apply for KAIST to study mathematical sciences and computer science but there is a problem my score on 9th and 10th grade is in low to high 70% as I didn't have any direction but in 11th it's 90+% I wish to pursue quantitative finance that's why I took commerce to eliminate non applicable sciences and focus on discrete mathematics and problem solving which resulted in a perfect SAT score of 1600 simultaneously hitting expert at Codeforces I know I lack the foundational mechanics and chemistry but I am self studying it so that I can compensate for it that's it for my profile will they like overlook my lack of physics and chemistry or should I take some standard tests like AP physics please let me know and yeah by the time of my application my 12th results won't be out