시간 제한메모리 제한제출정답맞힌 사람정답 비율
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문제

Albert는 친구들과 소수 (prime) 카드 게임을 하기로 했다. 총 m명의 플레이어가 있고, 양의 정수가 하나씩 적혀있는 n장의 카드가 있다. 편의상 카드에 적힌 수를 v[1], v[2], ..., v[n]이라 하자.

먼저 플레이어들에게 카드를 나눠준 후, 각자 점수를 계산하여 승자를 가린다.

n장의 카드는 아래 규칙에 따라 m명의 플레이어에게 나누어져야 한다:

  1. 각 카드는 반드시 한 명의 플레이어에게 주어진다.
  2. 각 플레이어는 최소 한 장의 카드를 받는다.

n장의 카드를 모두 분배한 후 아래 규칙에 따라 각자 점수를 계산한다:

  1. 먼저, 자신이 받은 카드에 적힌 수를 모두 더한다. 이를 S라 하자.
  2. S에 가장 가까우면서 S가 아닌 소수(prime number)를 P라 하자 (그런 소수가 여럿인 경우 아무 것 하나를 P라 한다).
  3. 해당 플레이어의 점수는 | S - P | 이다 ('|'는 절대값 기호이다).

예를 들어 n = m = 3이고 카드에 적힌 수가 [1, 2, 3]이라 하자. 이 때, 각 플레이어는 정확히 한 장씩 카드를 받는다.

  • 1이 적힌 카드를 받은 플레이어의 점수는 1이다 (1에 가장 가까운 소수는 2이다).
  • 2가 적힌 카드를 받은 플레이어의 점수는 1이다 (2에 가장 가까운 (2가 아닌) 소수는 3이다).
  • 3이 적힌 카드를 받은 플레이어의 점수느 1이다 (3에 가장 가까운 소수는 2이다).
  • 이 예제에서는 모든 플레이어의 점수가 1로 동일하다 (모두가 공동 승자이다).

다른 예로, n = 3, m = 2이고 카드에 적힌 수가 [23, 29, 41]이라 하자. 이 때, 한 플레이어는 카드 한 장을 받고 다른 플레이어는 두 장을 받게 된다. 아래와 같은 세 가지 방법으로 카드를 분배할 수 있다.

  • 방법 1: [23] 과 [29, 41]로 분배하는 경우, 23에 가장 가까운 소수는 19이고 (29+41)에 가장 가까운 소수는 71이다. 따라서 두 플레이어의 점수는 각각 4와 1이다.
  • 방법 2: [29] 과 [23, 41]로 분배하는 경우, 29에 가장 가까운 소수는 31이고 (23+41)에 가장 가까운 소수는 67이다. 따라서 두 플레이어의 점수는 2로 같다.
  • 방법 3: [41] 과 [23, 29]로 분배하는 경우, 41에 가장 가까운 소수는 43이고 (23+29)에 가장 가까운 소수는 53이다. 따라서 두 플레이어의 점수는 각각 2와 1이다.

Albert는 게임의 흥미를 위해 승자의 점수가 최소가 되도록 카드를 나눠주고 싶다. 위에 언급한 두 번째 예제의 경우 방법 1은 승자의 점수가 4이고 방법 2와 3은 승자의 점수가 2가 되므로 정답은 2가 된다. Albert가 달성 할 수 있는 승자의 점수 최소값을 구해보자. 

소수 (prime number): 양의 정수 P가 1보다 크고 P의 약수가 1과 P뿐이면 소수이다.

입력

첫 줄에 테스트 케이스의 수 T가 주어진다.

각 테스트 케이스는 두 줄에 걸쳐 주어진다.

첫 줄에 n과 m이 공백으로 구분되어 주어진다.

둘째 줄에 n개의 정수가 (v[1], ..., v[n]) 공백으로 구분되어 주어진다.

출력

각 테스트 케이스의 정답을 각 줄에 출력한다.

제한

  • 1 ≤ T ≤ 6
  • 1 ≤ m ≤ n ≤ 15
  • 1 ≤ v[i] ≤ 5,000,000
  • v[i]의 총합 <= 5,000,000 

예제 입력 1

6
3 3
1 2 3
3 3
23 29 41
3 2
23 29 41
4 4
23 29 31 37
5 2
10 20 30 40 50
5 3
10 20 30 40 50

예제 출력 1

1
4
2
4
1
1

예제 1: 본문에서 다루었다.

예제 2: 추가 설명 없음.

예제 3: 본문에서 다루었다.

예제 4: 추가 설명 없음.

예제 5: 가령 [10, 20, 30, 50]과 [40]을 나눠주면 두 플레이어 모두 1점을 얻게 된다.

예제 6: 가령 [10], [40], 그리고 [20, 30, 50]을 나눠주면 모든 플레이어가 각각 1점을 얻게 된다.

[{"problem_id":"23023","problem_lang":"0","title":"\uc18c\uc218 \uce74\ub4dc \uac8c\uc784","description":"<p>Albert\ub294 \uce5c\uad6c\ub4e4\uacfc \uc18c\uc218 (prime) \uce74\ub4dc \uac8c\uc784\uc744 \ud558\uae30\ub85c \ud588\ub2e4. \ucd1d m\uba85\uc758 \ud50c\ub808\uc774\uc5b4\uac00 \uc788\uace0,&nbsp;\uc591\uc758 \uc815\uc218\uac00 \ud558\ub098\uc529&nbsp;\uc801\ud600\uc788\ub294 n\uc7a5\uc758 \uce74\ub4dc\uac00 \uc788\ub2e4.&nbsp;\ud3b8\uc758\uc0c1 \uce74\ub4dc\uc5d0 \uc801\ud78c \uc218\ub97c v[1], v[2], ..., v[n]\uc774\ub77c \ud558\uc790.<\/p>\r\n\r\n<p>\uba3c\uc800 \ud50c\ub808\uc774\uc5b4\ub4e4\uc5d0\uac8c \uce74\ub4dc\ub97c \ub098\ub220\uc900 \ud6c4, \uac01\uc790 \uc810\uc218\ub97c \uacc4\uc0b0\ud558\uc5ec \uc2b9\uc790\ub97c \uac00\ub9b0\ub2e4.<\/p>\r\n\r\n<p>n\uc7a5\uc758 \uce74\ub4dc\ub294 \uc544\ub798 \uaddc\uce59\uc5d0 \ub530\ub77c m\uba85\uc758 \ud50c\ub808\uc774\uc5b4\uc5d0\uac8c \ub098\ub204\uc5b4\uc838\uc57c&nbsp;\ud55c\ub2e4:<\/p>\r\n\r\n<ol>\r\n\t<li>\uac01 \uce74\ub4dc\ub294 \ubc18\ub4dc\uc2dc \ud55c \uba85\uc758 \ud50c\ub808\uc774\uc5b4\uc5d0\uac8c \uc8fc\uc5b4\uc9c4\ub2e4.<\/li>\r\n\t<li>\uac01 \ud50c\ub808\uc774\uc5b4\ub294 \ucd5c\uc18c \ud55c \uc7a5\uc758 \uce74\ub4dc\ub97c \ubc1b\ub294\ub2e4.<\/li>\r\n<\/ol>\r\n\r\n<p>n\uc7a5\uc758 \uce74\ub4dc\ub97c \ubaa8\ub450 \ubd84\ubc30\ud55c \ud6c4 \uc544\ub798 \uaddc\uce59\uc5d0 \ub530\ub77c \uac01\uc790 \uc810\uc218\ub97c \uacc4\uc0b0\ud55c\ub2e4:<\/p>\r\n\r\n<ol>\r\n\t<li>\uba3c\uc800, \uc790\uc2e0\uc774 \ubc1b\uc740 \uce74\ub4dc\uc5d0 \uc801\ud78c \uc218\ub97c \ubaa8\ub450 \ub354\ud55c\ub2e4. \uc774\ub97c S\ub77c \ud558\uc790.<\/li>\r\n\t<li>S\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b0\uba74\uc11c S\uac00 \uc544\ub2cc&nbsp;\uc18c\uc218(prime number)\ub97c P\ub77c \ud558\uc790 (\uadf8\ub7f0 \uc18c\uc218\uac00 \uc5ec\ub7ff\uc778 \uacbd\uc6b0 \uc544\ubb34 \uac83 \ud558\ub098\ub97c P\ub77c \ud55c\ub2e4).<\/li>\r\n\t<li>\ud574\ub2f9 \ud50c\ub808\uc774\uc5b4\uc758 \uc810\uc218\ub294 | S - P | \uc774\ub2e4 (&#39;|&#39;\ub294 \uc808\ub300\uac12 \uae30\ud638\uc774\ub2e4).<\/li>\r\n<\/ol>\r\n\r\n<p>\uc608\ub97c \ub4e4\uc5b4 n = m = 3\uc774\uace0 \uce74\ub4dc\uc5d0 \uc801\ud78c \uc218\uac00 [1, 2, 3]\uc774\ub77c \ud558\uc790. \uc774 \ub54c, \uac01 \ud50c\ub808\uc774\uc5b4\ub294 \uc815\ud655\ud788 \ud55c \uc7a5\uc529 \uce74\ub4dc\ub97c \ubc1b\ub294\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>1\uc774 \uc801\ud78c \uce74\ub4dc\ub97c \ubc1b\uc740 \ud50c\ub808\uc774\uc5b4\uc758 \uc810\uc218\ub294 1\uc774\ub2e4 (1\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc18c\uc218\ub294 2\uc774\ub2e4).<\/li>\r\n\t<li>2\uac00 \uc801\ud78c \uce74\ub4dc\ub97c \ubc1b\uc740 \ud50c\ub808\uc774\uc5b4\uc758 \uc810\uc218\ub294 1\uc774\ub2e4 (2\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 (2\uac00 \uc544\ub2cc) \uc18c\uc218\ub294 3\uc774\ub2e4).<\/li>\r\n\t<li>3\uc774 \uc801\ud78c \uce74\ub4dc\ub97c \ubc1b\uc740 \ud50c\ub808\uc774\uc5b4\uc758 \uc810\uc218\ub290 1\uc774\ub2e4 (3\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc18c\uc218\ub294 2\uc774\ub2e4).<\/li>\r\n\t<li>\uc774 \uc608\uc81c\uc5d0\uc11c\ub294 \ubaa8\ub4e0 \ud50c\ub808\uc774\uc5b4\uc758 \uc810\uc218\uac00 1\ub85c \ub3d9\uc77c\ud558\ub2e4 (\ubaa8\ub450\uac00 \uacf5\ub3d9 \uc2b9\uc790\uc774\ub2e4).<\/li>\r\n<\/ul>\r\n\r\n<p>\ub2e4\ub978 \uc608\ub85c, n = 3, m = 2\uc774\uace0 \uce74\ub4dc\uc5d0 \uc801\ud78c \uc218\uac00 [23, 29, 41]\uc774\ub77c \ud558\uc790. \uc774 \ub54c, \ud55c \ud50c\ub808\uc774\uc5b4\ub294 \uce74\ub4dc \ud55c \uc7a5\uc744 \ubc1b\uace0 \ub2e4\ub978 \ud50c\ub808\uc774\uc5b4\ub294 \ub450 \uc7a5\uc744 \ubc1b\uac8c \ub41c\ub2e4. \uc544\ub798\uc640 \uac19\uc740 \uc138 \uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c \uce74\ub4dc\ub97c \ubd84\ubc30\ud560 \uc218 \uc788\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>\ubc29\ubc95 1: [23] \uacfc [29, 41]\ub85c \ubd84\ubc30\ud558\ub294 \uacbd\uc6b0, 23\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc18c\uc218\ub294 19\uc774\uace0 (29+41)\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc18c\uc218\ub294 71\uc774\ub2e4. \ub530\ub77c\uc11c \ub450 \ud50c\ub808\uc774\uc5b4\uc758 \uc810\uc218\ub294 \uac01\uac01 4\uc640 1\uc774\ub2e4.<\/li>\r\n\t<li>\ubc29\ubc95 2: [29] \uacfc [23, 41]\ub85c \ubd84\ubc30\ud558\ub294 \uacbd\uc6b0, 29\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc18c\uc218\ub294 31\uc774\uace0 (23+41)\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc18c\uc218\ub294 67\uc774\ub2e4. \ub530\ub77c\uc11c \ub450 \ud50c\ub808\uc774\uc5b4\uc758 \uc810\uc218\ub294 2\ub85c \uac19\ub2e4.<\/li>\r\n\t<li>\ubc29\ubc95 3: [41] \uacfc [23, 29]\ub85c \ubd84\ubc30\ud558\ub294 \uacbd\uc6b0, 41\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc18c\uc218\ub294 43\uc774\uace0 (23+29)\uc5d0 \uac00\uc7a5 \uac00\uae4c\uc6b4 \uc18c\uc218\ub294 53\uc774\ub2e4. \ub530\ub77c\uc11c \ub450 \ud50c\ub808\uc774\uc5b4\uc758 \uc810\uc218\ub294 \uac01\uac01 2\uc640 1\uc774\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n<p>Albert\ub294 \uac8c\uc784\uc758 \ud765\ubbf8\ub97c \uc704\ud574 \uc2b9\uc790\uc758 \uc810\uc218\uac00 \ucd5c\uc18c\uac00 \ub418\ub3c4\ub85d \uce74\ub4dc\ub97c \ub098\ub220\uc8fc\uace0 \uc2f6\ub2e4. \uc704\uc5d0 \uc5b8\uae09\ud55c \ub450 \ubc88\uc9f8 \uc608\uc81c\uc758 \uacbd\uc6b0 \ubc29\ubc95 1\uc740 \uc2b9\uc790\uc758 \uc810\uc218\uac00 4\uc774\uace0 \ubc29\ubc95 2\uc640 3\uc740 \uc2b9\uc790\uc758 \uc810\uc218\uac00 2\uac00 \ub418\ubbc0\ub85c \uc815\ub2f5\uc740 2\uac00 \ub41c\ub2e4. Albert\uac00 \ub2ec\uc131 \ud560 \uc218 \uc788\ub294 \uc2b9\uc790\uc758 \uc810\uc218 \ucd5c\uc18c\uac12\uc744 \uad6c\ud574\ubcf4\uc790.&nbsp;<\/p>\r\n\r\n<p><em>\uc18c\uc218 (prime number): \uc591\uc758 \uc815\uc218 P\uac00 1\ubcf4\ub2e4 \ud06c\uace0 P\uc758 \uc57d\uc218\uac00 1\uacfc P\ubfd0\uc774\uba74 \uc18c\uc218\uc774\ub2e4.<\/em><\/p>\r\n","input":"<p>\uccab \uc904\uc5d0 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc758 \uc218 T\uac00 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\uac01 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\ub294 \ub450 \uc904\uc5d0 \uac78\uccd0 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\uccab \uc904\uc5d0 n\uacfc m\uc774 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\ub458\uc9f8 \uc904\uc5d0 n\uac1c\uc758 \uc815\uc218\uac00 (v[1], ..., v[n])&nbsp;\uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n","output":"<p>\uac01 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc758 \uc815\ub2f5\uc744 \uac01 \uc904\uc5d0 \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"","original":"1","html_title":"0","problem_lang_tcode":"Korean","limit":"<ul>\r\n\t<li>1 &le; T &le; 6<\/li>\r\n\t<li>1 &le; m &le; n &le; 15<\/li>\r\n\t<li>1 &le; v[i] &le; 5,000,000<\/li>\r\n\t<li>v[i]\uc758 \ucd1d\ud569 &lt;= 5,000,000&nbsp;<\/li>\r\n<\/ul>\r\n","sample_explain_1":"<p>\uc608\uc81c 1:&nbsp;\ubcf8\ubb38\uc5d0\uc11c \ub2e4\ub8e8\uc5c8\ub2e4.<\/p>\r\n\r\n<p>\uc608\uc81c 2:&nbsp;\ucd94\uac00 \uc124\uba85 \uc5c6\uc74c.<\/p>\r\n\r\n<p>\uc608\uc81c 3:&nbsp;\ubcf8\ubb38\uc5d0\uc11c \ub2e4\ub8e8\uc5c8\ub2e4.<\/p>\r\n\r\n<p>\uc608\uc81c 4:&nbsp;\ucd94\uac00 \uc124\uba85 \uc5c6\uc74c.<\/p>\r\n\r\n<p>\uc608\uc81c 5:&nbsp;\uac00\ub839 [10, 20, 30, 50]\uacfc [40]\uc744 \ub098\ub220\uc8fc\uba74 \ub450 \ud50c\ub808\uc774\uc5b4 \ubaa8\ub450 1\uc810\uc744 \uc5bb\uac8c \ub41c\ub2e4.<\/p>\r\n\r\n<p>\uc608\uc81c 6:&nbsp;\uac00\ub839 [10], [40], \uadf8\ub9ac\uace0 [20, 30, 50]\uc744 \ub098\ub220\uc8fc\uba74 \ubaa8\ub4e0 \ud50c\ub808\uc774\uc5b4\uac00 \uac01\uac01&nbsp;1\uc810\uc744 \uc5bb\uac8c \ub41c\ub2e4.<\/p>\r\n"},{"problem_id":"23023","problem_lang":"1","title":"Prime Card Game","description":"<p>Albert plays the Prime Card Game with friends. There are m players and there are n cards, each with a positive number written on it. For convenience, let v[1], ..., v[n] be the positive numbers written on the cards.<\/p>\r\n\r\n<p>First, the cards are distributed to the players, and each player will calculate their score to determine the winner.<\/p>\r\n\r\n<p>The n cards must be distributed to the m players according to the following rules:<\/p>\r\n\r\n<ol>\r\n\t<li>Every card must be distributed to one&nbsp;player.<\/li>\r\n\t<li>Every player must receive at least one card.<\/li>\r\n<\/ol>\r\n\r\n<p>After the n cards are distributed, each player&#39;s score is calculated as follows:<\/p>\r\n\r\n<ol>\r\n\t<li>First, sum up the numbers written on the cards the player received. Let this sum be S.<\/li>\r\n\t<li>Let P be a prime number that is closest to S but not equal to S (if there are multiple, let any one of them be P).<\/li>\r\n\t<li>The player&#39;s score will be | S - P | (the absolute difference between the two).<\/li>\r\n<\/ol>\r\n\r\n<p>For instance, let n = m = 3 and v = [1, 2, 3]. In this case, every player would receive&nbsp;exactly one card.<\/p>\r\n\r\n<ul>\r\n\t<li>The player with the card of 1 would have a score of 1 (2 is the closest prime number to 1).<\/li>\r\n\t<li>The player with the card of 2 would have a score of 1&nbsp;(2 is the closest prime number to 3).<\/li>\r\n\t<li>The player with the card of 3 would have a score of 1 (2 is the closest prime number to&nbsp;2).<\/li>\r\n\t<li>In this example, every player&#39;s score is 1 (hence all are winners).<\/li>\r\n<\/ul>\r\n\r\n<p>In another example, let n = 3, m = 2 and&nbsp;v = [23, 29, 41]. In this case, one player would receive 1 card and the other 2 cards. There are three different ways to distribute the cards.<\/p>\r\n\r\n<ul>\r\n\t<li>Method 1: Players get [23] and&nbsp;[29, 41], respectively. The closest prime to 23 is 19 and that to (29+41) is 71. Hence, the player scores are 4 and 1, respectively.<\/li>\r\n\t<li>Method 2: Players get [29] and&nbsp;[23, 41], respectively. The closest prime to 29&nbsp;is 31&nbsp;and that to (23+41) is 67. Hence, both players&#39; score is 2.<\/li>\r\n\t<li>Method 3: Players get [41] and&nbsp;[23, 29], respectively. The closest prime to 41 is 43&nbsp;and that to (23+29) is 53. Hence, the player scores are 2 and 1, respectively.<\/li>\r\n<\/ul>\r\n\r\n<p>To make the game interesting, Albert wants to distribute the cards in a way that minimizes the winner&#39;s score. In the second example above, the answer is 2 as the winner&#39;s score is minimized when Method 2 or Method 3 is used. Help Albert compute the smallest possible&nbsp;score of the winning player.<\/p>\r\n\r\n<p><em>Prime Number (or just Prime): A positive number P is a prime number if it is greater than 1 and its only divisors are 1 and itself.<\/em><\/p>\r\n","input":"<p>The first line of the input will contain an integer T, the number of test cases.<\/p>\r\n\r\n<p>Each test case will be given by two lines. The first line will contain n and m, separated by whitespace. The second line will contain n integers (v[1], ..., v[n]), separated by whitespace.<\/p>\r\n","output":"<p>Output the answer for each test case in each line.<\/p>\r\n","hint":"","original":"0","html_title":"0","problem_lang_tcode":"English","limit":"<ul>\r\n\t<li>1 &le; T &le; 6<\/li>\r\n\t<li>1 &le; m &le; n &le; 15<\/li>\r\n\t<li>1 &le; v[i] &le; 5,000,000<\/li>\r\n\t<li>The sum of all v[i]&#39;s &le; 5,000,000<\/li>\r\n<\/ul>\r\n","sample_explain_1":"<p>Case 1:&nbsp;Discussed in the problem statement.<\/p>\r\n\r\n<p>Case 2:&nbsp;No explanation provided.<\/p>\r\n\r\n<p>Case 3:&nbsp;Discussed in the problem statement.<\/p>\r\n\r\n<p>Case 4:&nbsp;No explanation provided.<\/p>\r\n\r\n<p>Case 5: For instance, one player is given [10, 20, 30, 50] and the other [40] such that both players score 1.<\/p>\r\n\r\n<p>Case 6: For instance, players are given [10], [40], and [20, 30, 50] such that every player scores 1.<\/p>\r\n"}]

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