시간 제한메모리 제한제출정답맞힌 사람정답 비율
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문제

Albert는 앞으로 n개의 숙제를 해야한다 (편의상 1번부터 n번까지 번호가 붙어있다).

현재 시각은 S 이고, i번째 숙제의 내용은 정해진 시각 t[i]에 공개 된다 (어떤 숙제는 이미 공개 되었지만 Albert가 아직 제출 하지 않았을 수 있다). 각 숙제별로 벌점이 있어서, 만약 Albert가 i번째 숙제를 제출한 시각이 y[i] 라면 (y[i] - t[i]) × v[i] 만큼의 벌점이 부여된다.

숙제는 어렵지 않아서 모든 숙제는 내용이 공개 되는 즉시 풀어서 제출할 수 있지만, 숙제를 하나 제출하고나면 반드시 최소한의 휴식을 취해야 한다. Albert가 취할 수 있는 최소한의 휴식은 "1 단위 시간" 이다 (필요하다면 더 많이 쉬는 것도 가능하다).

예를 들어 n = 5, S = 3, t = [1, 2, 3, 4, 5], 그리고 v = [8, 3, 2, 13, 3]이라 하자.

  • 숙제를 순서대로 할 경우, 각 숙제를 제출한 시각은 y = [3, 4, 5, 6, 7]이 된다 (현재 시각이 3임에 유의하자). 이 경우, 총 벌점은 2 × 8 + 2 × 3 + 2 × 2 + 2 × 13 + 2 × 3 = 58 이다.
  • 숙제를 1, 4, 2, 5, 3번 순서로 할 경우, 각 숙제를 제출한 시각은 y = [3, 5, 7, 4, 6]이 된다. 이 경우, 총 벌점은 2 × 8 + 3 × 3 + 4 × 2 + 0 × 13 + 1 × 3 = 36 이다.
  • 숙제를 1, 5, 4, 3, 2 순서대로 할 경우, 각 숙제를 제출한 시각은 y = [3, 8, 7, 6, 5]이 된다. 이때, 숙제 1을 시각 3에 제출하고 숙제 5가 공개될 때 까지 "2 단위 시간" 만큼 휴식한다. 이 경우, 총 벌점은 2 × 8 + 6 × 3 + 4 × 2 + 2 × 13 + 0 × 3 = 42 이다.

이 예제에서 두 번째 방법이 벌점을 최소화 하는 방법이다.

Albert가 모든 숙제를 다 제출하면서 달성 가능한 최소한의 벌점이 몇점인지 구해보자.

입력

첫 줄에 테스트 케이스의 수 T가 주어진다.

각 테스트 케이스는 세 줄에 걸쳐 주어진다.

첫 줄에 두 정수 n과 S가 공백으로 구분되어 주어진다.

둘째 줄에 숙제가 언제 나오는지 나타내는 n개의 정수가 (t[1], ..., t[n]) 공백으로 구분되어 주어진다.

셋째 줄에 숙제의 벌점을 나타내는 n개의 정수가 (v[1], ..., v[n]) 공백으로 구분되어 주어진다.

출력

각 테스트 케이스의 정답인 최소 벌점을 각 줄에 출력한다.

제한

  • 1 ≤ T ≤ 10
  • 1 ≤ n ≤ 100,000
  • 1 ≤ S ≤ 2,000,000,000
  • 1 ≤ t[i] ≤ 2,000,000,000
  • 1 ≤ v[i] ≤ 40,000

예제 입력 1

2
5 3
1 2 3 4 5
8 3 2 13 3
5 30
10 20 30 40 50
8 3 2 13 3

예제 출력 1

36
197

예제 1: 본문에서 다루었다.

예제 2: 숙제를 1-2-3-4-5 순서대로 하는 것이 최선이다.

[{"problem_id":"23022","problem_lang":"0","title":"\uc219\uc81c","description":"<p>Albert\ub294 \uc55e\uc73c\ub85c n\uac1c\uc758 \uc219\uc81c\ub97c \ud574\uc57c\ud55c\ub2e4 (\ud3b8\uc758\uc0c1 1\ubc88\ubd80\ud130 n\ubc88\uae4c\uc9c0 \ubc88\ud638\uac00 \ubd99\uc5b4\uc788\ub2e4).<\/p>\r\n\r\n<p>\ud604\uc7ac \uc2dc\uac01\uc740 S \uc774\uace0, i\ubc88\uc9f8 \uc219\uc81c\uc758 \ub0b4\uc6a9\uc740&nbsp;\uc815\ud574\uc9c4 \uc2dc\uac01 t[i]\uc5d0 \uacf5\uac1c \ub41c\ub2e4 (\uc5b4\ub5a4 \uc219\uc81c\ub294 \uc774\ubbf8 \uacf5\uac1c \ub418\uc5c8\uc9c0\ub9cc Albert\uac00 \uc544\uc9c1 \uc81c\ucd9c \ud558\uc9c0 \uc54a\uc558\uc744 \uc218 \uc788\ub2e4). \uac01 \uc219\uc81c\ubcc4\ub85c \ubc8c\uc810\uc774 \uc788\uc5b4\uc11c,&nbsp;\ub9cc\uc57d Albert\uac00 i\ubc88\uc9f8 \uc219\uc81c\ub97c \uc81c\ucd9c\ud55c \uc2dc\uac01\uc774 y[i]&nbsp;\ub77c\uba74 (y[i] - t[i]) &times;&nbsp;v[i] \ub9cc\ud07c\uc758 \ubc8c\uc810\uc774 \ubd80\uc5ec\ub41c\ub2e4.<\/p>\r\n\r\n<p>\uc219\uc81c\ub294 \uc5b4\ub835\uc9c0 \uc54a\uc544\uc11c \ubaa8\ub4e0 \uc219\uc81c\ub294&nbsp;\ub0b4\uc6a9\uc774 \uacf5\uac1c \ub418\ub294 \uc989\uc2dc \ud480\uc5b4\uc11c \uc81c\ucd9c\ud560 \uc218 \uc788\uc9c0\ub9cc, \uc219\uc81c\ub97c \ud558\ub098 \uc81c\ucd9c\ud558\uace0\ub098\uba74 \ubc18\ub4dc\uc2dc \ucd5c\uc18c\ud55c\uc758 \ud734\uc2dd\uc744 \ucde8\ud574\uc57c \ud55c\ub2e4. Albert\uac00 \ucde8\ud560 \uc218 \uc788\ub294 \ucd5c\uc18c\ud55c\uc758 \ud734\uc2dd\uc740 &quot;1 \ub2e8\uc704 \uc2dc\uac04&quot; \uc774\ub2e4 (\ud544\uc694\ud558\ub2e4\uba74&nbsp;\ub354 \ub9ce\uc774 \uc26c\ub294 \uac83\ub3c4 \uac00\ub2a5\ud558\ub2e4).<\/p>\r\n\r\n<p>\uc608\ub97c \ub4e4\uc5b4 n = 5, S = 3, t = [1, 2, 3, 4, 5], \uadf8\ub9ac\uace0 v = [8, 3, 2, 13, 3]\uc774\ub77c \ud558\uc790.<\/p>\r\n\r\n<ul>\r\n\t<li>\uc219\uc81c\ub97c \uc21c\uc11c\ub300\ub85c \ud560 \uacbd\uc6b0, \uac01 \uc219\uc81c\ub97c \uc81c\ucd9c\ud55c \uc2dc\uac01\uc740&nbsp;y = [3, 4, 5, 6, 7]\uc774 \ub41c\ub2e4&nbsp;(\ud604\uc7ac \uc2dc\uac01\uc774 3\uc784\uc5d0&nbsp;\uc720\uc758\ud558\uc790). \uc774 \uacbd\uc6b0, \ucd1d \ubc8c\uc810\uc740 2 &times; 8 + 2 &times; 3 + 2 &times; 2 + 2 &times; 13 + 2 &times; 3 = 58 \uc774\ub2e4.<\/li>\r\n\t<li>\uc219\uc81c\ub97c 1, 4, 2, 5, 3\ubc88 \uc21c\uc11c\ub85c \ud560 \uacbd\uc6b0, \uac01 \uc219\uc81c\ub97c \uc81c\ucd9c\ud55c \uc2dc\uac01\uc740 y = [3, 5, 7, 4, 6]\uc774 \ub41c\ub2e4. \uc774 \uacbd\uc6b0, \ucd1d \ubc8c\uc810\uc740 2 &times; 8 + 3 &times; 3 + 4 &times; 2 + 0 &times; 13 + 1 &times; 3 = 36 \uc774\ub2e4.<\/li>\r\n\t<li>\uc219\uc81c\ub97c 1, 5, 4, 3, 2&nbsp;\uc21c\uc11c\ub300\ub85c \ud560 \uacbd\uc6b0, \uac01 \uc219\uc81c\ub97c \uc81c\ucd9c\ud55c \uc2dc\uac01\uc740 y = [3, 8, 7, 6, 5]\uc774 \ub41c\ub2e4. \uc774\ub54c, \uc219\uc81c 1\uc744 \uc2dc\uac01 3\uc5d0 \uc81c\ucd9c\ud558\uace0 \uc219\uc81c 5\uac00 \uacf5\uac1c\ub420 \ub54c \uae4c\uc9c0 &quot;2 \ub2e8\uc704 \uc2dc\uac04&quot; \ub9cc\ud07c \ud734\uc2dd\ud55c\ub2e4. \uc774 \uacbd\uc6b0, \ucd1d \ubc8c\uc810\uc740 2 &times; 8 + 6 &times; 3 + 4 &times; 2 + 2 &times; 13 + 0 &times; 3 = 42 \uc774\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n<p>\uc774 \uc608\uc81c\uc5d0\uc11c \ub450 \ubc88\uc9f8 \ubc29\ubc95\uc774 \ubc8c\uc810\uc744 \ucd5c\uc18c\ud654 \ud558\ub294 \ubc29\ubc95\uc774\ub2e4.<\/p>\r\n\r\n<p>Albert\uac00 \ubaa8\ub4e0 \uc219\uc81c\ub97c \ub2e4 \uc81c\ucd9c\ud558\uba74\uc11c \ub2ec\uc131 \uac00\ub2a5\ud55c \ucd5c\uc18c\ud55c\uc758 \ubc8c\uc810\uc774 \uba87\uc810\uc778\uc9c0 \uad6c\ud574\ubcf4\uc790.<\/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 \uc138 \uc904\uc5d0 \uac78\uccd0 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\uccab \uc904\uc5d0 \ub450 \uc815\uc218 n\uacfc S\uac00 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\ub458\uc9f8 \uc904\uc5d0 \uc219\uc81c\uac00 \uc5b8\uc81c \ub098\uc624\ub294\uc9c0 \ub098\ud0c0\ub0b4\ub294&nbsp;n\uac1c\uc758 \uc815\uc218\uac00 (t[1], ..., t[n]) \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\uc14b\uc9f8 \uc904\uc5d0 \uc219\uc81c\uc758 \ubc8c\uc810\uc744 \ub098\ud0c0\ub0b4\ub294 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\uc778 \ucd5c\uc18c \ubc8c\uc810\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; 10<\/li>\r\n\t<li>1 &le; n &le; 100,000<\/li>\r\n\t<li>1 &le; S &le; 2,000,000,000<\/li>\r\n\t<li>1 &le; t[i] &le; 2,000,000,000<\/li>\r\n\t<li>1 &le; v[i] &le; 40,000<\/li>\r\n<\/ul>\r\n","sample_explain_1":"<p>\uc608\uc81c 1: \ubcf8\ubb38\uc5d0\uc11c \ub2e4\ub8e8\uc5c8\ub2e4.<\/p>\r\n\r\n<p>\uc608\uc81c 2: \uc219\uc81c\ub97c 1-2-3-4-5 \uc21c\uc11c\ub300\ub85c \ud558\ub294 \uac83\uc774 \ucd5c\uc120\uc774\ub2e4.<\/p>\r\n"},{"problem_id":"23022","problem_lang":"1","title":"Homework","description":"<p>Albert needs to complete n homework assignments (HWs), numbered 1 to n.<\/p>\r\n\r\n<p>Current time is S, and the contents of HW i is scheduled to be released at time t[i] (some HWs&#39; contents may have already been released, although Albert has not submitted his work yet). Each HW has penalty so that if Albert submits HW i at time y[i], then he receives the penalty of (y[i] - t[i]) &times; v[i].<\/p>\r\n\r\n<p>HWs are so easy that Albert can submit his work as soon as the contents are released, but he must take a good rest after submitting each homework. The least amount of rest time is &quot;1 unit&quot; of time (but Albert may rest longer if needed).<\/p>\r\n\r\n<p>For instance, let n&nbsp;= 5, S = 3, t = [1, 2, 3, 4, 5], and v = [8, 3, 2, 13, 3].<\/p>\r\n\r\n<ul>\r\n\t<li>If HWs are completed in order of their indices, Albert&#39;s HW submission times would be&nbsp;y = [3, 4, 5, 6, 7] (note that the current time is 3). In this case, the overall penalty would be 2 &times; 8 + 2 &times; 3 + 2 &times; 2 + 2 &times; 13 + 2 &times; 3 = 58.<\/li>\r\n\t<li>If HW completion order is 1, 4, 2, 5, 3, then HW submission times would be y = [3, 5, 7, 4, 6]. In this case, the overall penalty would be 2 &times; 8 + 3 &times; 3 + 4 &times; 2 + 0 &times; 13 + 1 &times; 3 = 36.<\/li>\r\n\t<li>If HW completion order is 1, 5, 4, 3, 2, then HW submission times would be y = [3, 8, 7, 6, 5].<\/li>\r\n\t<li>Note that Albert would take a rest for 2 units of time after submitting HW 1 before HW 5 is released. In this case, the overall penalty would be 2 &times; 8 + 6 &times; 3 + 4 &times; 2 + 2 &times; 13 + 0 &times; 3 = 42 \uc774\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n<p>In this example, the second method minimizes the overall penalty.&nbsp;<\/p>\r\n\r\n<p>Compute the minimum penalty Albert can achieve when he submits all HWs.<\/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 consist of three lines. The first line will contain n and S, separated by whitespace. The second line will contain n integers (t[1], ..., t[n]), separated by whitespace. The third line will contain n integers (v[1], ..., v[n]), separated by whitespace.<\/p>\r\n","output":"<p>For each test case, output the minimum possible penalty in a single line.<\/p>\r\n","hint":"","original":"0","html_title":"0","problem_lang_tcode":"English","limit":"<ul>\r\n\t<li>1 &le; T &le; 10<\/li>\r\n\t<li>1 &le; n &le; 100,000<\/li>\r\n\t<li>1 &le; S &le; 2,000,000,000<\/li>\r\n\t<li>1 &le; t[i] &le; 2,000,000,000<\/li>\r\n\t<li>1 &le; v[i] &le; 40,000&nbsp;<\/li>\r\n<\/ul>\r\n","sample_explain_1":"<p>Case 1: Discussed in the problem statement.<\/p>\r\n\r\n<p>Case 2: It&#39;s optimal to order homework as&nbsp;1-2-3-4-5.<\/p>\r\n"}]

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