Merge pull request #1928 from Natan7/next_greater_element

Next Greater Element

Data Structure/Array Or Vector/Next Greater Element/SolutionByNatan7.rb

@@ -0,0 +1,52 @@
+def get_next_greater (index, array)
+  next_greater = array[index].to_i
+  index = index + 1
+
+  if index >= array.size
+    return -1
+  end
+
+  for i in index..(array.size-1)
+    if next_greater < array[i].to_i
+      return array[i].to_i
+    end
+  end
+
+  return -1
+end
+
+def next_greaters_element (array)
+  array_greaters = []
+
+  for i in 0..(array.size-1)
+    next_greater = array[i]
+    array_greaters.push(get_next_greater(i, array))
+  end
+
+  return array_greaters
+end
+
+# Take elements number of array and array elements
+print("Enter size of array: ")
+number = gets.chomp.to_i
+
+if number <= 1 || number> 10**6
+  print("Oh, invalid range!\n")
+  exit
+end
+
+array = []
+print("Now, enter each element of array:\n")
+i = 1
+while i<=number do
+  element = gets.chomp.to_i
+  if element <= 0 || element > 10**9
+    print("Oh, invalid range of element!\nTry again!\n")
+  else
+   array.push(element)
+   i=i+1
+  end
+end
+
+print("Array:" + array.to_s + "\n")
+print("Next greaters elements array:" + next_greaters_element(array).to_s + "\n")