diff --git a/marinbad/func.py b/marinbad/func.py
new file mode 100644
index 0000000..8200b3b
--- /dev/null
+++ b/marinbad/func.py
@@ -0,0 +1,74 @@
+def toBin(integer):
+    """
+    Convert a decimal integer into a binary"
+    :param integer: the integer to be converted
+    :type integer int
+    :return: int
+    """
+    return int(str(bin(integer))[2:])
+
+
+def toDec(binVal):
+    """
+    Convert a binary value to a decimal value
+    :param binVal: The bin value to be converted
+    :type binVal: int, str
+    :return: int
+    """
+    return int(str(binVal), 2)
+
+
+def toBinArray(array):
+    """
+    Turn an array of decimal into an array of binary
+    :param array:
+    :return:
+    """
+    return [toBin(el) for el in array]
+
+
+def computeS(array):
+    """
+    Sum all values in an array
+    :param array: the array to compute on
+    :type array: list
+    :return: int
+    """
+    return sum(array)
+
+
+def nimSomme(integer):
+    """Return an array with 0 if element is even, 1 otherwise"""
+    return [int(el) % 2 for el in str(integer)]
+
+
+def isSafe(array):
+    """
+    Return True if value computed from the array is zero, False otherwise
+    :param array: the array to compute
+    :type array: list
+    :return: bool
+    """
+    def list2str(array):
+        a = ""
+        for el in array:
+            a += str(el)
+        return a
+
+    binString = list2str([int(el) % 2 for el in list2str(array)])
+    return toDec(binString) == 0
+
+
+array = [3, 5, 7]
+
+binArr = toBinArray(array)
+print("Bin Array: ", binArr)
+
+S = computeS(binArr)
+print("S: ", S)
+
+nimS = nimSomme(S)
+print("Somme de NIM: ", nimS)
+
+safe = isSafe(nimS)
+print("Safe: ", safe)