Ejercicio duplicados en Python.

Author: gerryMartz

gerardo_martinez_romero.py

@@ -0,0 +1,22 @@
+def firs_duplicate(numbers):
+    dict = {}
+    result = -1
+
+    for index in range(0, len(numbers)):
+        element = numbers[index]
+        if element not in dict.keys():
+            dict[element] = True
+        else:
+            result = element
+            break
+        
+    return result
+
+lista_valores = [2, 3356, 52, 32, 65, 9, 2, 3356]
+print(firs_duplicate(lista_valores))
+
+lista_valores = [3356, 52, 32, 65, 9, 2, 3356]
+print(firs_duplicate(lista_valores))
+
+lista_valores = [ 52, 32, 65, 9, 2, 3356]
+print(firs_duplicate(lista_valores))