diff --git a/sample-programs/basic-1 b/sample-programs/basic-1
index 7a458eb..a88960b 100644
--- a/sample-programs/basic-1
+++ b/sample-programs/basic-1
@@ -31,20 +31,36 @@
 -- main = fibbonaci 10;
 -- answer: 55
 
-succ : Int -> Int;
-succ x = x - 1;
+-- succ : Int -> Int;
+-- succ x = x - 1;
+-- 
+-- isZero : Int -> Int;
+-- isZero x = case x of {
+--     0 => 1,
+--     _ => 0
+-- } : Int;
+-- 
+-- minimization : (Int -> Int) -> Int -> Int;
+-- minimization p x = case p x of { 
+--     1 => 0,
+--     _ => minimization p (succ x)
+-- } : Int;
+-- 
+-- main : Int;
+-- main = minimization isZero 10;
+-- answer: 0
 
-isZero : Int -> Int;
-isZero x = case x of {
-    0 => 1,
-    _ => 0
+posMul : Int -> Int -> Int;
+posMul a b = case b of {
+    0 => 0,
+    _ => a + posMul a (b - 1)
 } : Int;
 
-minimization : (Int -> Int) -> Int -> Int;
-minimization p x = case p x of { 
-    1 => 0,
-    _ => minimization p (succ x)
+facc : Int -> Int;
+facc a = case a of {
+    1 => 1,
+    _ => posMul a (facc (a - 1))
 } : Int;
 
 main : Int;
-main = minimization isZero 10;
\ No newline at end of file
+main = facc 27
\ No newline at end of file
diff --git a/src/LlvmIr.hs b/src/LlvmIr.hs
index 5c5532a..68f45f2 100644
--- a/src/LlvmIr.hs
+++ b/src/LlvmIr.hs
@@ -136,7 +136,7 @@ llvmIrToString = go 0
         replicate i '\t' <> case l of
             (Define t (Ident i) params) ->
                 concat
-                    [ "define ", show t, " @", i
+                    [ "define fastcc ", show t, " @", i
                     , "(", intercalate ", " (map (\(Ident y, x) -> unwords [show x, "%" <> y]) params)
                     , ") {\n"
                     ]
@@ -170,7 +170,7 @@ llvmIrToString = go 0
                     ]
             (Call t vis (Ident i) arg) ->
                 concat
-                    [ "call ", show t, " ", show vis, i, "("
+                    [ "call fastcc ", show t, " ", show vis, i, "("
                     , intercalate ", " $ Prelude.map (\(x, y) -> show x <> " " <> show y) arg
                     , ")\n"
                     ]