#522 (Div. 2)—C. Playing Piano
C. Playing Piano time limit per test 1 second memo …
#522 (Div. 2)—B. Personalized Cup（水题）
B. Personalized Cup time limit per test 1 second m …
#522 (Div. 2）—A. Kitchen Utensils（水题）
A. Kitchen Utensils time limit per test 1 second m …