return_null: 시도하지 않은 문제들 풀었나? 문제ID 문제 이름 출제자↓ 시도 횟수 정답 비율 CCR 문자 인식 Being 497 22% GANGSI 강시대소동 Corea 103 13% CIRCLEROUTES Circle Routes Corea 40 57% STRATA Strata Corea 87 24% NPOLY Nonsymetric Polyominoes JongMan 126 64% NQUEEN N-Queen JongMan 3686 50% DICT 사전 JongMan 1009 28% DIAMOND2 다이아몬드 2 JongMan 443 30% DIAMONDPATH Best Path On A Diamond JongMan 2498 43% CANDLESTICK Candlestick Charts JongMan 487 33% SCOREBOARD Scoreboard JongMan 160 20% RECAPTCHA reCAPTCHA JongMan 128 39% MOVE 운송 문제 JongMan 1754 20% ORDERING 할 일 순서 정하기 JongMan 1482 29% BOOKSTORE 인터넷 서점 JongMan 1754 17% PARTNER Broken Partnership JongMan 134 40% DEATH The Game of Death JongMan 368 26% BRUTEFORCE Brute-Force Attack JongMan 1075 32% COINS Coin Change JongMan 3143 44% TSP2 Traveling Salesman Problem 2 JongMan 2055 30% 1 2 3 4 5 6 7 ... 13