diff --git a/exercises/00_intro/intro1.rs b/exercises/00_intro/intro1.rs
index 5dd18b45..0979dc70 100644
--- a/exercises/00_intro/intro1.rs
+++ b/exercises/00_intro/intro1.rs
@@ -13,8 +13,6 @@
 // Execute `rustlings hint intro1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
     println!("Hello and");
     println!(r#"       welcome to...                      "#);
diff --git a/exercises/00_intro/intro2.rs b/exercises/00_intro/intro2.rs
index a28ad3dc..acb730db 100644
--- a/exercises/00_intro/intro2.rs
+++ b/exercises/00_intro/intro2.rs
@@ -5,8 +5,6 @@
 // Execute `rustlings hint intro2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
-    printline!("Hello there!")
+    println!("Hello there!")
 }
diff --git a/exercises/01_variables/variables1.rs b/exercises/01_variables/variables1.rs
index b3e089a5..98a0cf22 100644
--- a/exercises/01_variables/variables1.rs
+++ b/exercises/01_variables/variables1.rs
@@ -5,9 +5,7 @@
 // Execute `rustlings hint variables1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
-    x = 5;
+    let x = 5;
     println!("x has the value {}", x);
 }
diff --git a/exercises/01_variables/variables2.rs b/exercises/01_variables/variables2.rs
index e1c23edf..3e22ff4a 100644
--- a/exercises/01_variables/variables2.rs
+++ b/exercises/01_variables/variables2.rs
@@ -3,10 +3,9 @@
 // Execute `rustlings hint variables2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 fn main() {
-    let x;
+    let x: i32 = 10;
     if x == 10 {
         println!("x is ten!");
     } else {
diff --git a/exercises/01_variables/variables3.rs b/exercises/01_variables/variables3.rs
index 86bed419..8ebed313 100644
--- a/exercises/01_variables/variables3.rs
+++ b/exercises/01_variables/variables3.rs
@@ -3,9 +3,7 @@
 // Execute `rustlings hint variables3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
-    let x: i32;
+    let x: i32 = 56;
     println!("Number {}", x);
 }
diff --git a/exercises/01_variables/variables4.rs b/exercises/01_variables/variables4.rs
index 5394f394..0415fad0 100644
--- a/exercises/01_variables/variables4.rs
+++ b/exercises/01_variables/variables4.rs
@@ -3,10 +3,9 @@
 // Execute `rustlings hint variables4` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 fn main() {
-    let x = 3;
+    let mut x: i32 = 3;
     println!("Number {}", x);
     x = 5; // don't change this line
     println!("Number {}", x);
diff --git a/exercises/01_variables/variables5.rs b/exercises/01_variables/variables5.rs
index a29b38be..1c1d6d97 100644
--- a/exercises/01_variables/variables5.rs
+++ b/exercises/01_variables/variables5.rs
@@ -3,11 +3,10 @@
 // Execute `rustlings hint variables5` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 fn main() {
     let number = "T-H-R-E-E"; // don't change this line
     println!("Spell a Number : {}", number);
-    number = 3; // don't rename this variable
+    let number: i32 = 3; // don't rename this variable
     println!("Number plus two is : {}", number + 2);
 }
diff --git a/exercises/01_variables/variables6.rs b/exercises/01_variables/variables6.rs
index 853183ba..770a89b3 100644
--- a/exercises/01_variables/variables6.rs
+++ b/exercises/01_variables/variables6.rs
@@ -3,9 +3,9 @@
 // Execute `rustlings hint variables6` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
-const NUMBER = 3;
+
+const NUMBER: i8 = 3;
 fn main() {
     println!("Number {}", NUMBER);
 }
diff --git a/exercises/02_functions/functions1.rs b/exercises/02_functions/functions1.rs
index 40ed9a07..924ac0fa 100644
--- a/exercises/02_functions/functions1.rs
+++ b/exercises/02_functions/functions1.rs
@@ -3,8 +3,12 @@
 // Execute `rustlings hint functions1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+
 
 fn main() {
     call_me();
 }
+
+fn call_me() {
+    println!("Hello");
+}
diff --git a/exercises/02_functions/functions2.rs b/exercises/02_functions/functions2.rs
index 5154f34d..ab3da77b 100644
--- a/exercises/02_functions/functions2.rs
+++ b/exercises/02_functions/functions2.rs
@@ -3,14 +3,14 @@
 // Execute `rustlings hint functions2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+
 
 fn main() {
-    call_me(3);
+    call_me(5);
 }
 
-fn call_me(num:) {
+fn call_me(num:i32) {
     for i in 0..num {
-        println!("Ring! Call number {}", i + 1);
+        println!("Ring! Call number {}", i+1);
     }
 }
diff --git a/exercises/02_functions/functions3.rs b/exercises/02_functions/functions3.rs
index 74f44d6d..49a520c6 100644
--- a/exercises/02_functions/functions3.rs
+++ b/exercises/02_functions/functions3.rs
@@ -3,10 +3,9 @@
 // Execute `rustlings hint functions3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 fn main() {
-    call_me();
+    call_me(5);
 }
 
 fn call_me(num: u32) {
diff --git a/exercises/02_functions/functions4.rs b/exercises/02_functions/functions4.rs
index 77c4b2aa..3b41a75f 100644
--- a/exercises/02_functions/functions4.rs
+++ b/exercises/02_functions/functions4.rs
@@ -8,14 +8,13 @@
 // Execute `rustlings hint functions4` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 fn main() {
     let original_price = 51;
     println!("Your sale price is {}", sale_price(original_price));
 }
 
-fn sale_price(price: i32) -> {
+fn sale_price(price: i32) -> i32{
     if is_even(price) {
         price - 10
     } else {
diff --git a/exercises/02_functions/functions5.rs b/exercises/02_functions/functions5.rs
index f1b63f48..3608bf0f 100644
--- a/exercises/02_functions/functions5.rs
+++ b/exercises/02_functions/functions5.rs
@@ -3,7 +3,7 @@
 // Execute `rustlings hint functions5` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+
 
 fn main() {
     let answer = square(3);
@@ -11,5 +11,5 @@ fn main() {
 }
 
 fn square(num: i32) -> i32 {
-    num * num;
+    num * num
 }
diff --git a/exercises/03_if/if1.rs b/exercises/03_if/if1.rs
index 4734d78f..949ba788 100644
--- a/exercises/03_if/if1.rs
+++ b/exercises/03_if/if1.rs
@@ -2,13 +2,17 @@
 //
 // Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 pub fn bigger(a: i32, b: i32) -> i32 {
     // Complete this function to return the bigger number!
     // Do not use:
     // - another function call
     // - additional variables
+    if a > b {
+        a
+    } else {
+        b
+    }
 }
 
 // Don't mind this for now :)
diff --git a/exercises/03_if/if2.rs b/exercises/03_if/if2.rs
index f512f13f..40c07802 100644
--- a/exercises/03_if/if2.rs
+++ b/exercises/03_if/if2.rs
@@ -5,13 +5,14 @@
 //
 // Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 pub fn foo_if_fizz(fizzish: &str) -> &str {
     if fizzish == "fizz" {
         "foo"
+    } else if fizzish == "fuzz" {
+        "bar"
     } else {
-        1
+        "baz"
     }
 }
 
diff --git a/rmeta0ryf3V/lib.rmeta b/rmeta0ryf3V/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmeta2aSc3x/lib.rmeta b/rmeta2aSc3x/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmeta33i6If/lib.rmeta b/rmeta33i6If/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmeta5Wxz3U/lib.rmeta b/rmeta5Wxz3U/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmeta6SLzTY/lib.rmeta b/rmeta6SLzTY/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmeta6d4cEP/lib.rmeta b/rmeta6d4cEP/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmeta6ydyc4/lib.rmeta b/rmeta6ydyc4/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmeta7BJqFE/lib.rmeta b/rmeta7BJqFE/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaADFDqC/lib.rmeta b/rmetaADFDqC/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaC5KoMd/lib.rmeta b/rmetaC5KoMd/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaCZBhUm/lib.rmeta b/rmetaCZBhUm/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaG8ggMd/lib.rmeta b/rmetaG8ggMd/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaI9CfM1/lib.rmeta b/rmetaI9CfM1/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaJdmzg3/lib.rmeta b/rmetaJdmzg3/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaL1loEt/lib.rmeta b/rmetaL1loEt/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaLqB2Pt/lib.rmeta b/rmetaLqB2Pt/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaMILKnS/lib.rmeta b/rmetaMILKnS/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaOLfFya/lib.rmeta b/rmetaOLfFya/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaOUjPNE/lib.rmeta b/rmetaOUjPNE/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaSWrvVl/lib.rmeta b/rmetaSWrvVl/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaUuliaM/lib.rmeta b/rmetaUuliaM/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaVBOY8B/lib.rmeta b/rmetaVBOY8B/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaVYqrhZ/lib.rmeta b/rmetaVYqrhZ/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaVYslhO/lib.rmeta b/rmetaVYslhO/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaWPqumJ/lib.rmeta b/rmetaWPqumJ/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaXAwDJn/lib.rmeta b/rmetaXAwDJn/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaaRaIoY/lib.rmeta b/rmetaaRaIoY/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaasPVKX/lib.rmeta b/rmetaasPVKX/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetabDKu8I/lib.rmeta b/rmetabDKu8I/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetacxdTWN/lib.rmeta b/rmetacxdTWN/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaetiEOc/lib.rmeta b/rmetaetiEOc/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetafBXx3N/lib.rmeta b/rmetafBXx3N/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetahurnUg/lib.rmeta b/rmetahurnUg/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetamn1kMA/lib.rmeta b/rmetamn1kMA/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetan35lXf/lib.rmeta b/rmetan35lXf/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetancNxZE/lib.rmeta b/rmetancNxZE/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetanuq7Cb/lib.rmeta b/rmetanuq7Cb/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetanwtydK/lib.rmeta b/rmetanwtydK/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetaqrY8vE/lib.rmeta b/rmetaqrY8vE/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetas4kYOR/lib.rmeta b/rmetas4kYOR/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetayvCQVv/lib.rmeta b/rmetayvCQVv/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetazA76Xs/lib.rmeta b/rmetazA76Xs/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetazTHYWp/lib.rmeta b/rmetazTHYWp/lib.rmeta
new file mode 100644
index 00000000..e69de29b
diff --git a/rmetazkI4QF/lib.rmeta b/rmetazkI4QF/lib.rmeta
new file mode 100644
index 00000000..e69de29b