{"id":4142,"date":"2018-06-07T08:51:32","date_gmt":"2018-06-07T06:51:32","guid":{"rendered":"http:\/\/www.glc.us.es\/~jalonso\/exercitium\/?p=4142"},"modified":"2018-07-07T10:55:28","modified_gmt":"2018-07-07T08:55:28","slug":"recorrido-en-zigzag","status":"publish","type":"post","link":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/recorrido-en-zigzag\/","title":{"rendered":"Recorrido en ZigZag"},"content":{"rendered":"<p>El recorrido en ZigZag de una matriz consiste en pasar de la primera fila hasta la \u00faltima, de izquierda a derecha en las filas impares y de derecha a izquierda en las filas pares, como se indica en la figura.<\/p>\n<pre lang=\"text\">\r\n         \/             \\\r\n         | 1 -> 2 -> 3 |\r\n         |           | |\r\n         |           v |\r\n         | 4 <- 5 <- 6 |   =>  Recorrido ZigZag: [1,2,3,6,5,4,7,8,9]\r\n         | |           |\r\n         | v           |\r\n         | 7 -> 8 -> 9 |\r\n         \\             \/\r\n<\/pre>\n<p>Definir la funci\u00f3n<\/p>\n<pre lang=\"text\">\r\n   recorridoZigZag :: Matrix a -> [a]\r\n<\/pre>\n<p>tal que (recorridoZigZag m) es la lista con los elementos de la matriz m cuando se recorre esta en ZigZag. Por ejemplo,<\/p>\n<pre lang=\"text\">\r\n   \u03bb> recorridoZigZag (fromLists [[1,2,3],[4,5,6],[7,8,9]])\r\n   [1,2,3,6,5,4,7,8,9]\r\n   \u03bb> recorridoZigZag (fromLists [[1,2],[3,4],[5,6],[7,8]])\r\n   [1,2,4,3,5,6,8,7]\r\n   \u03bb> recorridoZigZag (fromLists [[1,2,3,4],[5,6,7,8],[9,10,11,12]])\r\n   [1,2,3,4,8,7,6,5,9,10,11,12]\r\n   \u03bb> recorridoZigZag (fromList 5 4 \"Cada paso es la meta\")\r\n   \"Cadasap o es al meta\"\r\n   \u03bb> recorridoZigZag (fromList 4 5 \"Cada paso es la meta\")\r\n   \"Cada  osapes laatem \"\r\n   \u03bb> recorridoZigZag (fromList 10 2 \"Cada paso es la meta\")\r\n   \"Caad psao se l ameat\"\r\n   \u03bb> recorridoZigZag (fromList 2 10 \"Cada paso es la meta\")\r\n   \"Cada paso atem al se\"\r\n<\/pre>\n<h4>Soluciones<\/h4>\n<pre lang=\"haskell\">\r\nimport Data.Matrix (Matrix, toLists, fromLists, fromList)\r\n\r\nrecorridoZigZag :: Matrix a -> [a]\r\nrecorridoZigZag m =\r\n  concat [f xs | (f,xs) <- zip (cycle [id,reverse]) (toLists m)]\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>El recorrido en ZigZag de una matriz consiste en pasar de la primera fila hasta la \u00faltima, de izquierda a derecha en las filas impares y de derecha a izquierda en las filas pares, como se indica en la figura. \/ \\ | 1 -> 2 -> 3 | | | | | v |&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"footnotes":"","_jetpack_memberships_contains_paid_content":false},"categories":[4],"tags":[8,12,166,63,42,32,394,9],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/4142"}],"collection":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/comments?post=4142"}],"version-history":[{"count":2,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/4142\/revisions"}],"predecessor-version":[{"id":4160,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/posts\/4142\/revisions\/4160"}],"wp:attachment":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/media?parent=4142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/categories?post=4142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/exercitium\/wp-json\/wp\/v2\/tags?post=4142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}