{"request":{"endpoint":"https://exercism.org/api/v2/tracks/crystal/exercises/saddle-points/community_solutions","query":{},"options":{"initial_data":{"results":[{"uuid":"514846ef6a5b48c390c811e41a60389c","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) saddle_points = Set(NamedTuple(row: Int32, column: Int32)).new (0...matrix.size).each do |row| (0...matrix[row].size).each do |column| if matrix[row][column] == matrix[row].max && matrix[row][column] == matrix.transpose[column].min saddle_points << {row: row + 1, column: column + 1} end end ","num_views":0,"num_stars":1,"num_comments":0,"representation_num_published_solutions":2,"num_iterations":1,"num_loc":13,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2023-06-25T13:21:01.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"ryanplusplus"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/ryanplusplus","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"580fbe9339114bc790936c1926e6a962","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) ret = Set.new [] of NamedTuple(row: Int32, column: Int32) matrix.each_with_index do |row, i| matrix.transpose.each_with_index do |col, j| if row.max == matrix[i][j] && col.min == matrix[i][j] ret << {row: i + 1, column: j + 1} end end end ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":2,"num_loc":13,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2024-06-06T15:29:22.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"radha-8784"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/radha-8784","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"3a90991c992e44b18fe81e298339e533","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) sp = Set(NamedTuple(row: Int32, column: Int32)).new row_max = matrix.map(&.max) col_min = matrix.transpose.map &.min row_max.each_with_index do |max, row| next if max != row_max.min col_min.each_with_index do |min, col| next if min != max sp << {row: row+1, column: col+1} ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":15,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2024-10-19T06:59:38.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"mraffonso-1870"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/mraffonso-1870","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"2c1af2cfd26a4e7eb52032b008926b9f","snippet":"module SaddlePoints # Find all saddle points in a grid # A saddle point is the largest value in its row and smallest value in its column def self.saddle_points(grid : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) result = Set(NamedTuple(row: Int32, column: Int32)).new # Handle empty grid case return result if grid.empty? num_rows = grid.size ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":27,"iteration_status":"non_actionable_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2025-06-24T21:01:35.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"VickMahase"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/VickMahase","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"6f17f2c394d1499ebe01d81c9c47ebe8","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) row_max = matrix.map(&.max) col_min = matrix.transpose.map(&.min) saddle_points = Set(NamedTuple(row: Int32, column: Int32)).new row_max.each_index do |row_num| col_num = -1 while col_num = col_min.index(row_max[row_num], col_num + 1) saddle_points << {row: row_num + 1, column: col_num + 1} end ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":14,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2026-07-15T19:21:37.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"swsch"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/swsch","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"a3c81ed82caf41959fa45e9ba5a2f5ac","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) transposed = matrix.transpose matrix.map_with_index do |row, i| transposed.map_with_index do |col, j| row.max == col.min ? {row: i + 1, column: j + 1} : nil end end .flatten ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":3,"num_loc":13,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2024-10-16T13:09:31.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"monpetit"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/monpetit","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"5161732d8fd34352b363a22be3c8ac7d","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) maxs_in_rows = matrix.map(&.max) mins_in_cols = matrix.transpose.map(&.min) result = Set(NamedTuple(row: Int32, column: Int32)).new matrix.each_with_index do |row, y| row.each_with_index do |col, x| next unless col == maxs_in_rows[y] && col == mins_in_cols[x] ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":14,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2023-11-01T12:05:41.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"ls1955"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/ls1955","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"abc783e1440749c2b7efbd95e41885dc","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) points1 = matrix.map(&.max) points2 = matrix.transpose.map(&.min) saddles = Set.new(points1) & Set.new(points2) res = Set(NamedTuple(row: Int32, column: Int32)).new saddles.each { |sad| points1.each_with_index { |a, idx1| points2.each_with_index { |b, idx2| res << {row: idx1 + 1, column: idx2 + 1} if a==b==sad ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":16,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2025-06-16T14:27:57.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"JoshFerg"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/JoshFerg","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"f965b9b099e74d53b948d2dbd0c7dbcd","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) result = Set(NamedTuple(row: Int32, column: Int32)).new return result if matrix.empty? || matrix.first.empty? num_rows = matrix.size num_cols = matrix.first.size row_maxima = matrix.map(&.max) ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":20,"iteration_status":"actionable_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2026-07-24T15:12:33.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"niksyarg"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/niksyarg","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"015be5151a574f019e8e8d33ff3ac0ce","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) result = Set.new [] of NamedTuple(row: Int32, column: Int32) return result if matrix.empty? row_max, col_min = matrix.map &.max, matrix.transpose.map &.min row_max.each_with_index do |row, i| next if row != row_max.min ","num_views":0,"num_stars":1,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":15,"iteration_status":"non_actionable_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2023-08-15T10:28:58.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"Jeddi212"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/Jeddi212","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"2397ded1dd1c4f14bfbf25735f13336a","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) return Set(NamedTuple(row: Int32, column: Int32)).new if matrix.empty? || matrix[0].empty? max_in_rows = Array.new(matrix.size) { Int32::MIN } min_in_cols = Array.new(matrix[0].size) { Int32::MAX } # Find max in each row and min in each column matrix.each_with_index do |row, i| row.each_with_index do |value, j| ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":22,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2024-01-21T15:12:50.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"david82"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/david82","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"567d31d69fce4c6c9f97ac9d54cf0859","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) sp = Set.new [] of NamedTuple(row: Int32, column: Int32) if matrix.size == 0 return sp end saddle = Int32::MAX matrix.each do |row| rmax = row.max if rmax < saddle ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":38,"iteration_status":"non_actionable_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2025-03-17T22:25:13.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"alterpatzer"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/alterpatzer","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"095636fffc5042d8892d65ff3c1cc929","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) result = Set(NamedTuple(row: Int32, column: Int32)).new matrix.each_with_index do |row, r| max_indices(row).each do |c| min_indices(column(matrix, c)).each do |min_r| result << {row: r + 1, column: c + 1} if min_r == r end end end ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":24,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2025-03-24T01:38:14.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"jinwoo"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/jinwoo","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"e857caff8e6c47e795b4f379e23ce244","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) return Set(NamedTuple(row: Int32, column: Int32)).new if matrix.empty? || matrix[0].empty? row_max = Array.new(matrix.size) { Int32::MIN } col_min = Array.new(matrix[0].size) { Int32::MAX } matrix.each_with_index do |r, i| r.each_with_index do |val, j| row_max[i] = val if val > row_max[i] ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":20,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2025-08-10T14:09:18.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"Rohankapri"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/Rohankapri","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}},{"uuid":"e45fa9d9fb8f434a850852988d317f48","snippet":"module SaddlePoints def self.saddle_points(matrix : Array(Array(Int32))) : Set(NamedTuple(row: Int32, column: Int32)) return Set(NamedTuple(row: Int32, column: Int32)).new if matrix.empty? (0...matrix.size).to_a.cartesian_product((0...matrix[0].size).to_a) .select { |row, col| matrix[row].max == matrix[row][col] && matrix[row][col] == matrix.transpose[col].min } .map { |row, col| {row: row + 1, column: col + 1} } .to_set end end ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":9,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2024-08-12T14:29:46.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"LoadingBG"},"exercise":{"title":"Σαγματικά σημεία","icon_url":"https://assets.exercism.org/exercises/saddle-points.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/solutions/LoadingBG","private_iterations_url":"https://exercism.org/el/tracks/crystal/exercises/saddle-points/iterations"}}],"meta":{"current_page":1,"total_count":15,"total_pages":1,"unscoped_total":15}}}}}

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