26 lines
493 B
Ruby
26 lines
493 B
Ruby
# @param {Integer[][]} mat
|
|
# @return {Integer}
|
|
def num_special(mat)
|
|
count = 0
|
|
|
|
mat.each_with_index do |row, i|
|
|
row.each_with_index do |cell, j|
|
|
count += 1 if cell == 1 && special?(mat, i, j)
|
|
end
|
|
end
|
|
|
|
count
|
|
end
|
|
|
|
def special?(mat, row_index, column_index)
|
|
mat[row_index].each_with_index do |cell, x|
|
|
return false if cell == 1 && x != column_index
|
|
end
|
|
|
|
mat.each_with_index do |row, x|
|
|
return false if row[column_index] == 1 && x != row_index
|
|
end
|
|
|
|
true
|
|
end
|