\uc548\ub155\ud558\uc138\uc694! \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 ‘\ud0c0\uc784\uba38\uc2e0\uc73c\ub85c \ube68\ub9ac \uac00\uae30’\ub77c\ub294 \ud765\ubbf8\ub85c\uc6b4 \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c\ub97c \ub2e4\ub8e8\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \ubb38\uc81c\ub294 \ub2e4\uc591\ud55c \ub370\uc774\ud130 \uad6c\uc870\uc640 \uc54c\uace0\ub9ac\uc998\uc744 \ud65c\uc6a9\ud558\uc5ec \ud574\uacb0\ud560 \uc218 \uc788\uc73c\uba70, \ucf54\ub529 \ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ucd9c\uc81c\ub429\ub2c8\ub2e4. \uc544\ub798\uc5d0\uc11c \ubb38\uc81c \uc124\uba85, \uc811\uadfc \ubc29\uc2dd, \uadf8\ub9ac\uace0 \ucf54\ub4dc \uad6c\ud604\uc744 \uc0c1\uc138\ud788 \ub2e4\ub8e8\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc2dc\uac04 \uc5ec\ud589\uc774 \uac00\ub2a5\ud55c \ud0c0\uc784\uba38\uc2e0\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ud0c0\uc784\uba38\uc2e0\uc740 \ud2b9\uc815 \uc2dc\uac04\uc73c\ub85c \uc774\ub3d9\ud560 \uc218 \uc788\ub294 \uae30\ub2a5\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ud0c0\uc784\uba38\uc2e0\uc758 \uc791\ub3d9\uc744 \uc704\ud574 \ub2e4\uc74c\uacfc \uac19\uc740 \uc870\uac74\uc774 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4:<\/p>\n
0<\/code>\uc5d0\uc11c \uc2dc\uc791\ud569\ub2c8\ub2e4.<\/li>\n- \ud0c0\uc784\uba38\uc2e0\uc740
t - 1<\/code>\ub144 \ud6c4\uc758 \uc2dc\uac04\uc73c\ub85c \uc774\ub3d9\ud560 \uc218 \uc788\ub294 \ub2a5\ub825\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc989, t<\/code>\uc640 \uac19\uc740 \uc2dc\uac04\uc774 \uc8fc\uc5b4\uc9c8 \uacbd\uc6b0 t - 1<\/code>\ub85c \uc774\ub3d9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n- \uc8fc\uc5b4\uc9c4 \uc2dc\uac04
n<\/code>\uae4c\uc9c0 \ube60\ub974\uac8c \ub3c4\ub2ec\ud558\uae30 \uc704\ud574 \ucd5c\uc18c\ud55c\uc758 \uc774\ub3d9 \ud69f\uc218\ub97c \ucc3e\uc544\uc57c \ud569\ub2c8\ub2e4.<\/li>\n- \ud0c0\uc784\uba38\uc2e0\uc758 \uc774\ub3d9\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ub429\ub2c8\ub2e4:\n
\n- \uc9c0\uae08 \uc2dc\uac04\uc5d0\uc11c
+1<\/code> \ucd08\uac00 \uac78\ub9ac\ub294 \uc9c1\uc811 \uc774\ub3d9.<\/li>\n- \ud0c0\uc784\uba38\uc2e0\uc744 \ud1b5\ud574
t - 1<\/code> \ub144\uc73c\ub85c \uc774\ub3d9\ud558\ub294 \uac83\uc774 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\uc785\ub825<\/h3>\n\n- \uc815\uc218
n<\/code> (0 \u2264 n \u2264 1,000,000): \ub3c4\ub2ec\ud558\uace0\uc790 \ud558\ub294 \ubaa9\ud45c \uc2dc\uac04<\/li>\n<\/ul>\n\ucd9c\ub825<\/h3>\n\n- \uc2dc\uac04
n<\/code>\uc5d0 \ub3c4\ub2ec\ud558\ub294 \ucd5c\uc18c\uc758 \uc774\ub3d9 \ud69f\uc218\ub97c \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\uc811\uadfc \ubc29\uc2dd<\/h2>\n
\uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574 BFS(Breadth-First Search) \uc54c\uace0\ub9ac\uc998\uc744 \ud65c\uc6a9\ud558\uaca0\uc2b5\ub2c8\ub2e4. BFS\ub294 \ucd5c\ub2e8 \uacbd\ub85c\ub97c \ucc3e\ub294 \ub370 \ud6a8\uacfc\uc801\uc785\ub2c8\ub2e4. \ub124\ud2b8\uc6cc\ud06c \uadf8\ub798\ud504\uc758 \ubaa8\ub4e0 \uc815\uc810\uc5d0 \uace0\ub974\uac8c \uc811\uadfc\ud558\ub294 \uc131\uc9c8 \ub355\ubd84\uc5d0, \ud604\uc7ac \uc704\uce58\uc5d0\uc11c \uac00\ub2a5\ud55c \ubaa8\ub4e0 \uc774\ub3d9\uc744 \ud55c \ubc88\uc529 \uc2dc\ub3c4\ud574\ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
BFS\ub97c \uc774\uc6a9\ud55c \uc811\uadfc \ubc29\uc2dd<\/h3>\n\n- \ud604\uc7ac\uc758 \uc2dc\uac04\uc774
0<\/code>\ubd80\ud130 \uc2dc\uc791\ud569\ub2c8\ub2e4.<\/li>\n- \ud050\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud604\uc7ac\uc758 \uc2dc\uac04\uacfc \uc774\ub3d9 \ud69f\uc218\ub97c \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/li>\n
- \ud050\uc5d0\uc11c \uc2dc\uac04\uc744 \uaebc\ub0b4\uba70 \ub450 \uac00\uc9c0 \uc774\ub3d9\uc744 \uc2dc\ub3c4\ud569\ub2c8\ub2e4:\n
\n+1<\/code>: \ud604\uc7ac \uc2dc\uac04 + 1<\/li>\nt - 1<\/code>: \ud604\uc7ac \uc2dc\uac04 – 1 (\ub2e8, 0<\/code>\ubcf4\ub2e4 \uc791\uc9c0 \uc54a\ub3c4\ub85d \uac80\uc0ac)<\/li>\n<\/ul>\n<\/li>\n- \ubaa9\ud45c \uc2dc\uac04\uc774 \ub418\uba74 \uadf8 \uc2dc\uc810\uc758 \uc774\ub3d9 \ud69f\uc218\ub97c \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n
\ubb38\uc81c \ud574\uacb0\uc744 \uc704\ud55c \uc54c\uace0\ub9ac\uc998 \uad6c\ud604<\/h2>\n\nfrom collections import deque\n\ndef min_move_to_time(n):\n visited = [False] * (2 * n + 1) # \ubc29\ubb38 \uc5ec\ubd80\ub97c \uc800\uc7a5\ud560 \uc14b\n queue = deque([(0, 0)]) # \uc2dc\uc791\uc810 (\ud604\uc7ac \uc2dc\uac04, \uc774\ub3d9 \ud69f\uc218)\n\n while queue:\n current_time, moves = queue.popleft()\n \n # \ubaa9\ud45c\uc5d0 \ub3c4\ub2ec\ud588\ub294\uc9c0 \ud655\uc778\n if current_time == n:\n return moves\n \n # \ub450 \uac00\uc9c0 \uc774\ub3d9 \uc2dc\ub3c4: +1\uacfc t - 1\n next_pos = current_time + 1\n if next_pos <= 2 * n and not visited[next_pos]:\n visited[next_pos] = True\n queue.append((next_pos, moves + 1))\n\n next_pos = current_time - 1\n if 0 <= next_pos and not visited[next_pos]:\n visited[next_pos] = True\n queue.append((next_pos, moves + 1))\n<\/code><\/pre>\n\ucf54\ub4dc \ud574\uc11d<\/h2>\n
\uc704\uc758 \ucf54\ub4dc\uc5d0\uc11c, min_move_to_time<\/code> \ud568\uc218\ub294 \uc785\ub825\uc73c\ub85c \uc8fc\uc5b4\uc9c4 n<\/code>\uae4c\uc9c0 \uc774\ub3d9\ud558\ub294 \ucd5c\uc18c \ud69f\uc218\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \ucf54\ub4dc\uc758 \uad6c\uc870\uc785\ub2c8\ub2e4:<\/p>\n\nvisited<\/code> \ub9ac\uc2a4\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubc29\ubb38\ud55c \uc2dc\uac04\ub4e4\uc744 \uae30\ub85d\ud558\uace0 \ubb34\ud55c\ud788 \ud0d0\uc0c9\ud558\uc9c0 \uc54a\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/li>\n- \ud050\uc5d0\uc11c \ud604\uc7ac \uc2dc\uac04\uacfc \uc774\ub3d9 \ud69f\uc218\ub97c \uaebc\ub0b4\uc5b4, \ubaa9\ud45c\uc5d0 \ub3c4\ub2ec\ud588\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/li>\n
- \ud0c0\uc784\uba38\uc2e0\uc758 \ub450 \uac00\uc9c0 \uc774\ub3d9 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub2e4\uc74c \uc2dc\uac04\uc744 \ud050\uc5d0 \ucd94\uac00\ud558\uace0, \uc774\ub54c
visited<\/code> \ub9ac\uc2a4\ud2b8\ub97c \uc5c5\ub370\uc774\ud2b8\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\uacb0\uacfc \ud14c\uc2a4\ud2b8<\/h2>\n
\uc774\uc81c \uc774 \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud558\uc5ec \uba87 \uac00\uc9c0 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\ub97c \uc2e4\ud589\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
\n# \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4 1\nprint(min_move_to_time(5)) # \ucd9c\ub825: 5\n\n# \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4 2\nprint(min_move_to_time(10)) # \ucd9c\ub825: 10\n\n# \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4 3\nprint(min_move_to_time(100)) # \ucd9c\ub825: 100\n<\/code><\/pre>\n\uacb0\ub860<\/h2>\n
‘\ud0c0\uc784\uba38\uc2e0\uc73c\ub85c \ube68\ub9ac \uac00\uae30’ \ubb38\uc81c\ub294 BFS \uc54c\uace0\ub9ac\uc998\uc744 \uc774\uc6a9\ud558\uc5ec \ucd5c\uc801\uc758 \uacb0\uc815\uc744 \ub0b4\ub9ac\ub294 \uacfc\uc815\uc744 \ubc30\uc6b8 \uc218 \uc788\ub294 \uc88b\uc740 \uc608\uc2dc\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c \ud574\uacb0 \ub2a5\ub825\uc744 \ud55c\uce35 \ub354 \ud0a4\uc6b8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc5ec\ub7ec\ubd84\uc758 \ucf54\ub529 \ud14c\uc2a4\ud2b8\uc5d0 \uc88b\uc740 \uacb0\uacfc\uac00 \uc788\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4!<\/p>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"