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26124번 - 조명 배치 다국어

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문제

윤이는 최근에 Mazecraft라는 게임을 즐기고 있다. Mazecraft는 $H\times W$ 직사각형 격자 위에 미로를 그리는 게임이다. 격자의 맨 왼쪽 위 격자칸의 좌표는 $(1,1),ドル 맨 오른쪽 아래 격자칸의 좌표는 $(H,W)$이다. 각 격자칸은 빈칸이거나 벽이며, 빈칸에는 조명을 설치할 수 있다. 각 조명은 양의 정수인 밝기를 가지고 있다.

격자에서 두 빈칸 사이의 거리는 한 빈칸에서 시작해서 인접한 빈칸으로 이동하는 것을 반복하여 다른 빈칸에 도달하는 데 필요한 최소 이동 횟수이다. 만약 한 빈칸에서 시작해서 다른 빈칸으로 도달할 수 없다면, 두 빈칸 사이의 거리는 정의되지 않는다.

Mazecraft는 독특한 조명 시스템을 갖추고 있는데, 그 원리는 다음과 같다.

  • 어떤 빈칸에 밝기가 $c$인 조명 $L$이 설치되어 있다고 하자. 조명 $L$은 빈칸마다 정수 값의 영향력을 미치며, 영향력의 크기는 조명에서 멀어질수록 작아진다. 조명 $L$이 각 빈칸에 미치는 영향력은 구체적으로 다음과 같이 계산된다.
    • $L$이 위치한 격자칸에 미치는 영향력은 $c$이다.
    • $L$과의 거리가 1ドル$인 격자칸에 미치는 영향력은 $c-1$이다.
    • $\dots$
    • $L$과의 거리가 $c-2$인 격자칸에 미치는 영향력은 2ドル$이다.
    • $L$과의 거리가 $c-1$인 격자칸에 미치는 영향력은 1ドル$이다.
    • 그 외의 빈칸에는 영향력을 미치지 않는다.
  • 어떤 빈칸의 밝기는, 모든 조명들이 이 빈칸에 미치는 영향력 중 최댓값이다. 만약 빈칸에 영향력을 미치는 조명이 하나도 없으면 그 빈칸의 밝기는 0ドル$이다.

윤이는 인터넷에서 마음에 드는 미로를 발견해서 Mazecraft에서 따라 만들어 보기로 했다. 그런데 윤이가 발견한 미로의 설계도에는 모든 빈칸의 밝기가 기록되어 있지만 조명의 위치는 기록되어 있지 않았다. 윤이는 최소 개수의 조명을 설치해서, 벽의 배치와 빈칸의 밝기가 설계도와 동일한 미로를 만들고자 한다. 설계도와 동일한 미로를 만드는 것이 가능한지 판별하고, 만약 가능하다면 필요한 조명의 최소 개수를 구하시오.

입력

첫 번째 줄에는 정수 $H,ドル $W$가 주어진다. $(1\le H,W\le 1\ 000)$

다음 $H$개의 줄에는 미로의 밝기 정보가 주어진다. 각 줄에는 $W$개의 정수가 공백으로 구분되어 주어진다. 이 중 $i$번째 줄의 $j$번째 정수는 격자칸 $(i,j)$의 밝기를 나타내며, 밝기는 0ドル$ 이상 10ドル\ 000$ 이하의 정수이다. 만약 해당 격자칸에 벽이 있다면 대신 $-1$이 주어진다.

출력

만약 설계도와 동일한 미로를 만드는 것이 가능하다면, 그러한 미로를 만드는 데 필요한 조명의 최소 개수를 출력한다. 만약 미로를 만드는 것이 불가능하다면, $-1$을 출력한다.

제한

예제 입력 1

5 5
4 3 2 1 0
5 -1 1 0 0
4 3 2 1 0
3 2 1 0 0
2 1 0 0 0

예제 출력 1

1

$(2,1)$ 위치에 밝기 5ドル$의 조명을 설치하면 설계도와 동일한 미로를 만들 수 있다.

예제 입력 2

4 6
3 -1 5 4 3 2
2 -1 4 3 2 1
1 -1 3 2 2 1
0 1 2 2 3 2

예제 출력 2

3

$(1,1),ドル $(1,3),ドル $(4,5)$ 위치에 각각 밝기 3ドル,ドル 5ドル,ドル 3ドル$의 조명을 설치하면 설계도와 동일한 미로를 만들 수 있다.

예제 입력 3

3 2
0 0
-1 -1
0 0

예제 출력 3

0

조명을 설치하지 않고 설계도와 동일한 미로를 만들 수 있다.

예제 입력 4

3 3
0 0 0
0 9 0
0 0 0

예제 출력 4

-1

설계도와 동일한 미로를 만드는 것은 불가능하다.

힌트

[{"problem_id":"26124","problem_lang":"0","title":"\uc870\uba85 \ubc30\uce58","description":"<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/a18f8523-bd0f-4634-9da3-e3e8ef6c9362\/\" style=\"max-width: 100%; width: 400px;\" \/><\/p>\r\n\r\n<p>\uc724\uc774\ub294 \ucd5c\uadfc\uc5d0 Mazecraft\ub77c\ub294 \uac8c\uc784\uc744 \uc990\uae30\uace0 \uc788\ub2e4. Mazecraft\ub294 $H\\times W$ \uc9c1\uc0ac\uac01\ud615 \uaca9\uc790 \uc704\uc5d0 \ubbf8\ub85c\ub97c \uadf8\ub9ac\ub294 \uac8c\uc784\uc774\ub2e4. \uaca9\uc790\uc758 \ub9e8 \uc67c\ucabd \uc704 \uaca9\uc790\uce78\uc758 \uc88c\ud45c\ub294 $(1,1)$, \ub9e8 \uc624\ub978\ucabd \uc544\ub798 \uaca9\uc790\uce78\uc758 \uc88c\ud45c\ub294 $(H,W)$\uc774\ub2e4. \uac01 \uaca9\uc790\uce78\uc740 \ube48\uce78\uc774\uac70\ub098 \ubcbd\uc774\uba70, \ube48\uce78\uc5d0\ub294 \uc870\uba85\uc744 \uc124\uce58\ud560 \uc218 \uc788\ub2e4. \uac01 \uc870\uba85\uc740 \uc591\uc758 \uc815\uc218\uc778 \ubc1d\uae30\ub97c \uac00\uc9c0\uace0 \uc788\ub2e4.<\/p>\r\n\r\n<p>\uaca9\uc790\uc5d0\uc11c \ub450 \ube48\uce78 \uc0ac\uc774\uc758 \uac70\ub9ac\ub294 \ud55c \ube48\uce78\uc5d0\uc11c \uc2dc\uc791\ud574\uc11c \uc778\uc811\ud55c \ube48\uce78\uc73c\ub85c \uc774\ub3d9\ud558\ub294 \uac83\uc744 \ubc18\ubcf5\ud558\uc5ec \ub2e4\ub978 \ube48\uce78\uc5d0 \ub3c4\ub2ec\ud558\ub294 \ub370 \ud544\uc694\ud55c \ucd5c\uc18c \uc774\ub3d9 \ud69f\uc218\uc774\ub2e4. \ub9cc\uc57d \ud55c \ube48\uce78\uc5d0\uc11c \uc2dc\uc791\ud574\uc11c \ub2e4\ub978 \ube48\uce78\uc73c\ub85c \ub3c4\ub2ec\ud560 \uc218 \uc5c6\ub2e4\uba74, \ub450 \ube48\uce78 \uc0ac\uc774\uc758 \uac70\ub9ac\ub294 \uc815\uc758\ub418\uc9c0 \uc54a\ub294\ub2e4.<\/p>\r\n\r\n<p>Mazecraft\ub294 \ub3c5\ud2b9\ud55c \uc870\uba85 \uc2dc\uc2a4\ud15c\uc744 \uac16\ucd94\uace0 \uc788\ub294\ub370, \uadf8 \uc6d0\ub9ac\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>\uc5b4\ub5a4 \ube48\uce78\uc5d0 \ubc1d\uae30\uac00 $c$\uc778 \uc870\uba85 $L$\uc774 \uc124\uce58\ub418\uc5b4 \uc788\ub2e4\uace0 \ud558\uc790. \uc870\uba85 $L$\uc740 \ube48\uce78\ub9c8\ub2e4 \uc815\uc218 \uac12\uc758 \uc601\ud5a5\ub825\uc744 \ubbf8\uce58\uba70, \uc601\ud5a5\ub825\uc758 \ud06c\uae30\ub294 \uc870\uba85\uc5d0\uc11c \uba40\uc5b4\uc9c8\uc218\ub85d \uc791\uc544\uc9c4\ub2e4. \uc870\uba85 $L$\uc774 \uac01 \ube48\uce78\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\ub825\uc740 \uad6c\uccb4\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub41c\ub2e4.\r\n\t<ul>\r\n\t\t<li>$L$\uc774 \uc704\uce58\ud55c \uaca9\uc790\uce78\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\ub825\uc740 $c$\uc774\ub2e4.<\/li>\r\n\t\t<li>$L$\uacfc\uc758 \uac70\ub9ac\uac00 $1$\uc778 \uaca9\uc790\uce78\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\ub825\uc740 $c-1$\uc774\ub2e4.<\/li>\r\n\t\t<li>$\\dots$<\/li>\r\n\t\t<li>$L$\uacfc\uc758 \uac70\ub9ac\uac00 $c-2$\uc778 \uaca9\uc790\uce78\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\ub825\uc740 $2$\uc774\ub2e4.<\/li>\r\n\t\t<li>$L$\uacfc\uc758 \uac70\ub9ac\uac00 $c-1$\uc778 \uaca9\uc790\uce78\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\ub825\uc740 $1$\uc774\ub2e4.<\/li>\r\n\t\t<li>\uadf8 \uc678\uc758 \ube48\uce78\uc5d0\ub294 \uc601\ud5a5\ub825\uc744 \ubbf8\uce58\uc9c0 \uc54a\ub294\ub2e4.<\/li>\r\n\t<\/ul>\r\n\t<\/li>\r\n\t<li>\uc5b4\ub5a4 \ube48\uce78\uc758 \ubc1d\uae30\ub294, \ubaa8\ub4e0 \uc870\uba85\ub4e4\uc774 \uc774 \ube48\uce78\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\ub825 \uc911 \ucd5c\ub313\uac12\uc774\ub2e4. \ub9cc\uc57d \ube48\uce78\uc5d0 \uc601\ud5a5\ub825\uc744 \ubbf8\uce58\ub294 \uc870\uba85\uc774 \ud558\ub098\ub3c4 \uc5c6\uc73c\uba74 \uadf8 \ube48\uce78\uc758 \ubc1d\uae30\ub294 $0$\uc774\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n<p>\uc724\uc774\ub294 \uc778\ud130\ub137\uc5d0\uc11c \ub9c8\uc74c\uc5d0 \ub4dc\ub294 \ubbf8\ub85c\ub97c \ubc1c\uacac\ud574\uc11c Mazecraft\uc5d0\uc11c \ub530\ub77c \ub9cc\ub4e4\uc5b4 \ubcf4\uae30\ub85c \ud588\ub2e4. \uadf8\ub7f0\ub370 \uc724\uc774\uac00 \ubc1c\uacac\ud55c \ubbf8\ub85c\uc758 \uc124\uacc4\ub3c4\uc5d0\ub294 \ubaa8\ub4e0 \ube48\uce78\uc758 \ubc1d\uae30\uac00 \uae30\ub85d\ub418\uc5b4 \uc788\uc9c0\ub9cc \uc870\uba85\uc758 \uc704\uce58\ub294 \uae30\ub85d\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc558\ub2e4. \uc724\uc774\ub294 \ucd5c\uc18c \uac1c\uc218\uc758 \uc870\uba85\uc744 \uc124\uce58\ud574\uc11c, \ubcbd\uc758 \ubc30\uce58\uc640 \ube48\uce78\uc758 \ubc1d\uae30\uac00 \uc124\uacc4\ub3c4\uc640 \ub3d9\uc77c\ud55c \ubbf8\ub85c\ub97c \ub9cc\ub4e4\uace0\uc790 \ud55c\ub2e4. \uc124\uacc4\ub3c4\uc640 \ub3d9\uc77c\ud55c \ubbf8\ub85c\ub97c \ub9cc\ub4dc\ub294 \uac83\uc774 \uac00\ub2a5\ud55c\uc9c0 \ud310\ubcc4\ud558\uace0, \ub9cc\uc57d \uac00\ub2a5\ud558\ub2e4\uba74 \ud544\uc694\ud55c \uc870\uba85\uc758 \ucd5c\uc18c \uac1c\uc218\ub97c \uad6c\ud558\uc2dc\uc624.<\/p>\r\n","input":"<p>\uccab \ubc88\uc9f8 \uc904\uc5d0\ub294 \uc815\uc218 $H$, $W$\uac00 \uc8fc\uc5b4\uc9c4\ub2e4. $(1\\le H,W\\le 1\\ 000)$<\/p>\r\n\r\n<p>\ub2e4\uc74c $H$\uac1c\uc758 \uc904\uc5d0\ub294 \ubbf8\ub85c\uc758 \ubc1d\uae30 \uc815\ubcf4\uac00 \uc8fc\uc5b4\uc9c4\ub2e4. \uac01 \uc904\uc5d0\ub294 $W$\uac1c\uc758 \uc815\uc218\uac00 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4. \uc774 \uc911 $i$\ubc88\uc9f8 \uc904\uc758 $j$\ubc88\uc9f8 \uc815\uc218\ub294 \uaca9\uc790\uce78 $(i,j)$\uc758 \ubc1d\uae30\ub97c \ub098\ud0c0\ub0b4\uba70, \ubc1d\uae30\ub294 $0$ \uc774\uc0c1 $10\\ 000$ \uc774\ud558\uc758 \uc815\uc218\uc774\ub2e4. \ub9cc\uc57d \ud574\ub2f9 \uaca9\uc790\uce78\uc5d0 \ubcbd\uc774 \uc788\ub2e4\uba74 \ub300\uc2e0 $-1$\uc774 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n","output":"<p>\ub9cc\uc57d \uc124\uacc4\ub3c4\uc640 \ub3d9\uc77c\ud55c \ubbf8\ub85c\ub97c \ub9cc\ub4dc\ub294 \uac83\uc774 \uac00\ub2a5\ud558\ub2e4\uba74, \uadf8\ub7ec\ud55c \ubbf8\ub85c\ub97c \ub9cc\ub4dc\ub294 \ub370 \ud544\uc694\ud55c \uc870\uba85\uc758 \ucd5c\uc18c \uac1c\uc218\ub97c \ucd9c\ub825\ud55c\ub2e4. \ub9cc\uc57d \ubbf8\ub85c\ub97c \ub9cc\ub4dc\ub294 \uac83\uc774 \ubd88\uac00\ub2a5\ud558\ub2e4\uba74, $-1$\uc744 \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"","original":"1","html_title":"0","problem_lang_tcode":"Korean","sample_explain_1":"<p>$(2,1)$ \uc704\uce58\uc5d0 \ubc1d\uae30 $5$\uc758 \uc870\uba85\uc744 \uc124\uce58\ud558\uba74 \uc124\uacc4\ub3c4\uc640 \ub3d9\uc77c\ud55c \ubbf8\ub85c\ub97c \ub9cc\ub4e4 \uc218 \uc788\ub2e4.<\/p>\r\n","sample_explain_2":"<p>$(1,1)$, $(1,3)$, $(4,5)$ \uc704\uce58\uc5d0 \uac01\uac01 \ubc1d\uae30 $3$, $5$, $3$\uc758 \uc870\uba85\uc744 \uc124\uce58\ud558\uba74 \uc124\uacc4\ub3c4\uc640 \ub3d9\uc77c\ud55c \ubbf8\ub85c\ub97c \ub9cc\ub4e4 \uc218 \uc788\ub2e4.<\/p>\r\n","sample_explain_3":"<p>\uc870\uba85\uc744 \uc124\uce58\ud558\uc9c0 \uc54a\uace0 \uc124\uacc4\ub3c4\uc640 \ub3d9\uc77c\ud55c \ubbf8\ub85c\ub97c \ub9cc\ub4e4 \uc218 \uc788\ub2e4.<\/p>\r\n","sample_explain_4":"<p>\uc124\uacc4\ub3c4\uc640 \ub3d9\uc77c\ud55c \ubbf8\ub85c\ub97c \ub9cc\ub4dc\ub294 \uac83\uc740 \ubd88\uac00\ub2a5\ud558\ub2e4.<\/p>\r\n"},{"problem_id":"26124","problem_lang":"1","title":"Light Placement","description":"<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/a18f8523-bd0f-4634-9da3-e3e8ef6c9362\/\" style=\"max-width: 100%; width: 400px;\" \/><\/p>\r\n\r\n<p>Yunee has recently been playing a game called Mazecraft. Mazecraft is a game where you draw a maze on a $H\\times W$ rectangular grid. The upper left cell is denoted as $(1,1)$, and the lower right cell is denoted as $(H,W)$. Each grid cell is either a blank cell or a wall, and a light can be installed in the blank cell. Each light has a positive integer brightness.<\/p>\r\n\r\n<p>The distance between two blank cells is the minimum number of moves required to reach from one cell to another by repeatedly moving to an adjacent blank cell. The distance is not defined if it is impossible to reach one another.<\/p>\r\n\r\n<p>Mazecraft has a unique lighting system that works as follows.<\/p>\r\n\r\n<ul>\r\n\t<li>Suppose a light $L$ with brightness $c$ is installed in a blank cell. It influences other blank cells by an integer value, and the influence value gets smaller the further away from $L$. To be specific,\r\n\t<ul>\r\n\t\t<li>The influence on the blank cell where $L$ is located is $c$.<\/li>\r\n\t\t<li>The influence on the blank cells of distance $1$ from $L$ is $c-1$.<\/li>\r\n\t\t<li>$\\dots$<\/li>\r\n\t\t<li>The influence on the blank cells of distance $c-2$ from $L$ is $2$.<\/li>\r\n\t\t<li>The influence on the blank cells of distance $c-1$ from $L$ is $1$.<\/li>\r\n\t\t<li>$L$ does not influence any other cells.<\/li>\r\n\t<\/ul>\r\n\t<\/li>\r\n\t<li>The light level of a blank cell is defined as the maximum influence of all lights on the cell. If no lights influence the cell, its light level is $0$.<\/li>\r\n<\/ul>\r\n\r\n<p>Yunee found an interesting maze on the internet and decided to make it in Mazecraft. However, its blueprint did not contain the position and brightness of the lights. Instead, it only showed the light level of each blank cell. Yunee wants to make a maze identical to the blueprint in terms of wall placement and light levels, by installing a minimum number of lights. Determine if it is possible to make a maze identical to the blueprint, and if so, determine the minimum number of lights required.<\/p>\r\n","input":"<p>In the first line, the height $H$ and the width $W$ are given. $(1\\le H,W\\le 1\\ 000)$<\/p>\r\n\r\n<p>In the next $H$ lines, the blueprint of a maze is given. $W$ integers are given in each line. In the $i$-th line, the $j$-th integer represents the light level of cell $(i,j)$. A light level is an integer that ranges from $0$ to $10\\ 000$, inclusive. If there is a wall in the cell, $-1$ is given instead.<\/p>\r\n","output":"<p>If it is possible to make a maze identical to the blueprint, print the minimum number of lights required to make such a maze. Otherwise, print $-1$.<\/p>\r\n","hint":"","original":"0","html_title":"0","problem_lang_tcode":"English","sample_explain_1":"<p>Yunee can make a maze identical to the blueprint by placing a light of brightness $5$ at $(2,1)$.<\/p>\r\n","sample_explain_2":"<p>Yunee can make a maze identical to the blueprint by placing lights of brightness $3$, $5$, $3$ at $(1,1)$, $(1,3)$, $(4,5)$ respectively.<\/p>\r\n","sample_explain_3":"<p>Yunee can make a maze identical to the blueprint by not placing lights.<\/p>\r\n","sample_explain_4":"<p>It is impossible to make a maze identical to the blueprint.<\/p>\r\n"}]

출처

University > UNIST > 4th UNIST Algorithm Programming Contest Uni-CODE 2022 C번

(追記) (追記ここまで)

출처

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