Sufficient Conditions

They all ostracized him, envied him, and said he was a sissy if he had long hair. Call him shameless. When Chen Tiaomang heard about the arrival of art students, he was very disgusted. But after meeting each other, the other person's personality was so good. It's so funny that I can't even hate it. It is said that the cultural performance of art students is worrying. However, Xia Ren said: "If you pay more attention to the two subjects of Mathematics and English, you can get full marks." Chen Tiaomang, who had the highest score in the science class, asked him a question: "Ah, this is very simple. Can you do reverse thinking?" Not only does this classmate have beautiful hands, he even teaches math problems and draws pictures on scratch paper very beautifully. But even with great looks, excellent grades, and unparalleled talent, there are still times when he feels inferior and discouraged. But even if you feel inferior and discouraged, you can move forward courageously.