1 files changed, 42 insertions, 0 deletions
diff --git a/python/somme.py b/python/somme.py
new file mode 100644
index 0000000..79e928c
--- /dev/null
+++ b/python/somme.py
@@ -0,0 +1,42 @@
+def sequenza(n, pollatz, tCollatz = -1):
+	tot = 1
+	
+	if pollatz:
+		m = 5
+	else:
+		m = 3
+		
+	pari = lambda n: ((n % 2) == 0)
+
+	while n != 1:
+		if pari(n):
+			n /= 2
+		else:
+			n = n*m+1
+			
+		tot += 1
+		
+		if tCollatz != -1 and tot > tCollatz:
+			break
+			
+	
+	return tot
+
+
+with open('input.txt') as fin:
+	N = fin.readline().split(' ')
+
+	
+N[0] = int(N[0])
+N[1] = int(N[1])
+
+tot = 0
+
+for i in range(N[0], N[1]+1):
+	collatz = sequenza(i, False)
+	
+	if sequenza(i, True, collatz) < collatz:
+		tot += 1
+		
+with open('output.txt', 'w') as fout:
+	fout.write(str(tot))
+\ No newline at end of file