\n \ub2f9\uc2e0\uc740 \uc18c\uc15c \ub124\ud2b8\uc6cc\ud06c\uc758 \uc0ac\uc6a9\uc790 \uad00\uacc4\ub97c \ud30c\uc545\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uac1c\ubc1c\ud574\uc57c \ud569\ub2c8\ub2e4.
\n \uc8fc\uc5b4\uc9c4 \uc0ac\uc6a9\uc790\ub4e4\uc758 \uce5c\uad6c \uad00\uacc4\ub97c \ud1a0\ub300\ub85c \ub2e4\uc74c \ub450 \uac00\uc9c0 \uc694\uccad\uc5d0 \ub300\ud55c \ub2f5\uc744 \uc81c\uacf5\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud574\uc57c \ud569\ub2c8\ub2e4.\n <\/p>\n
\n \uccab \ubc88\uc9f8 \uc904\uc5d0 \uc0ac\uc6a9\uc790 \uc218 N\uacfc \uce5c\uad6c \uad00\uacc4\uc758 \uc218 M\uc774 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4. (1 \u2264 N \u2264 100,000, 0 \u2264 M \u2264 1,000,000)\n <\/p>\n
\n \ub2e4\uc74c M\uc904\uc5d0 \uac78\uccd0 \uac01 \uc904\ub9c8\ub2e4 \ub450 \uac1c\uc758 \uc815\uc218 A\uc640 B\uac00 \uc8fc\uc5b4\uc9c0\uba70 \uc774\ub294 A\uac00 B\uc758 \uce5c\uad6c\ub77c\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.\n <\/p>\n
\n \uccab \ubc88\uc9f8 \uc904\uc5d0 \uc0ac\uc6a9\uc790 A\uc758 \uce5c\uad6c \ubaa9\ub85d\uc744 \uc624\ub984\ucc28\uc21c\uc73c\ub85c \ucd9c\ub825\ud558\ub77c.
\n \ub450 \ubc88\uc9f8 \uc904\uc5d0 ‘YES’ \ub610\ub294 ‘NO’\ub85c \uc0ac\uc6a9\uc790 A\uc640 B\uc758 \uce5c\uad6c \uc5ec\ubd80\ub97c \ucd9c\ub825\ud558\ub77c.\n <\/p>\n
\n \uc785\ub825 \uc608\uc2dc:\n 5 4\n 1 2\n 1 3\n 2 4\n 3 5\n \n 1\n 2\n\n \ucd9c\ub825 \uc608\uc2dc:\n 2 3\n NO\n <\/pre>\n\uc811\uadfc \ubc29\uc2dd<\/h2>\n
\n \uc774 \ubb38\uc81c\ub97c \ud480\uae30 \uc704\ud574\uc11c\ub294 \uce5c\uad6c \uad00\uacc4\ub97c \ud6a8\uc728\uc801\uc73c\ub85c \uc800\uc7a5\ud558\uace0 \uc870\ud68c\ud574\uc57c \ud569\ub2c8\ub2e4.
\n \uadf8\ub798\ud504 \uc774\ub860\uc744 \ud65c\uc6a9\ud558\uc5ec \uc778\uc811 \ub9ac\uc2a4\ud2b8 \ub610\ub294 \uc9d1\ud569(set) \uc790\ub8cc\uad6c\uc870\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n <\/p>\n\n \uba3c\uc800 \uc0ac\uc6a9\uc790\ub4e4\uacfc \uce5c\uad6c \uad00\uacc4 \uc815\ubcf4\ub97c \uc800\uc7a5\ud558\uae30 \uc704\ud574 \ube48 \ub9ac\uc2a4\ud2b8\ub97c \ucd08\uae30\ud654\ud569\ub2c8\ub2e4.
\n \uadf8 \ud6c4, \uac01 \uce5c\uad6c \uad00\uacc4\ub97c \uc785\ub825\ubc1b\uc544 \ud574\ub2f9 \uc815\ubcf4\ub97c \uc800\uc7a5\ud569\ub2c8\ub2e4.
\n \uce5c\uad6c \ubaa9\ub85d\uc744 \uc815\ub82c\ud558\uc5ec \ucd9c\ub825\ud558\uace0, \uce5c\uad6c \uad00\uacc4 \ud655\uc778 \uc694\uccad\uc5d0 \ub300\ud55c \uc751\ub2f5\ub3c4 \uc81c\uacf5\ud569\ub2c8\ub2e4.\n <\/p>\n\uc18c\uc2a4 \ucf54\ub4dc<\/h2>\n
\n def manage_friendship(n, m, friendships, a, b):\n friends = {i: set() for i in range(1, n + 1)}\n \n for x, y in friendships:\n friends[x].add(y)\n friends[y].add(x)\n \n friend_list = sorted(friends[a])\n is_friend = \"YES\" if b in friends[a] else \"NO\"\n \n return friend_list, is_friend\n \n # \uc785\ub825 \ucc98\ub9ac\n n, m = map(int, input().split())\n friendships = [tuple(map(int, input().split())) for _ in range(m)]\n a = int(input())\n b = int(input())\n\n # \uce5c\uad6c \uad00\uacc4 \uad00\ub9ac\n friend_list, is_friend = manage_friendship(n, m, friendships, a, b)\n\n # \uacb0\uacfc \ucd9c\ub825\n print(\" \".join(map(str, friend_list)))\n print(is_friend)\n <\/pre>\n\uacb0\ub860<\/h2>\n
\n \uc774 \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c\ub294 \ub370\uc774\ud130 \uad6c\uc870\uc640 \uc54c\uace0\ub9ac\uc998\uc758 \uae30\ubcf8\uc801\uc778 \uc774\ud574\ub97c \ubc14\ud0d5\uc73c\ub85c \uce5c\uad6c \uad00\uacc4\ub97c \ud6a8\uc728\uc801\uc73c\ub85c \uad00\ub9ac\ud558\uace0
\n \uc870\ud68c\ud558\ub294 \ubc29\ubc95\uc744 \uc694\uad6c\ud569\ub2c8\ub2e4.
\n \uc2e4\uc81c \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c\uc5d0\uc11c\ub3c4 \uc774\ub7ec\ud55c \ud615\ud0dc\uc758 \ub370\uc774\ud130 \uad00\uacc4\ub97c \ucc98\ub9ac\ud558\ub294 \uac83\uc774 \uc8fc\ubb38\uc81c\uc791 \ub610\ub294 \uc18c\uc15c \ub124\ud2b8\uc6cc\ud06c\uc640 \uac19\uc740
\n \ud50c\ub7ab\ud3fc \uac1c\ubc1c\uc5d0 \uc790\uc8fc \ub4f1\uc7a5\ud558\ubbc0\ub85c, \uc774\ub7ec\ud55c \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc744 \uc775\ud788\ub294 \uac83\uc740 \ub9e4\uc6b0 \uc720\uc6a9\ud569\ub2c8\ub2e4.\n <\/p>\n\ubd80\ub85d<\/h2>\n
\n \uce5c\uad6c \uad00\uacc4\uc640 \uac19\uc740 \ub9ce\uc740 \uadf8\ub798\ud504 \ubb38\uc81c\ub294 DFS(\uae4a\uc774 \uc6b0\uc120 \ud0d0\uc0c9) \ub610\ub294 BFS(\ub108\ube44 \uc6b0\uc120 \ud0d0\uc0c9)\uc640 \uac19\uc740 \ud0d0\uc0c9 \uc54c\uace0\ub9ac\uc998\uc744 \ud1b5\ud574
\n \ub354 \ud655\uc7a5\ub41c \ubb38\uc81c\ub85c \ubc1c\uc804\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.
\n \uc774 \ubb38\uc81c\ub97c \ubc14\ud0d5\uc73c\ub85c \uadf8\ub7ec\ud55c \uc2ec\ud654 \ubb38\uc81c\uc5d0\ub3c4 \ub3c4\uc804\ud574 \ubcf4\uae38 \ubc14\ub78d\ub2c8\ub2e4.\n <\/p>\n<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"