Check as_int usage in hints (lambdaclass#1191)

* Add `as_int` logic to `assert_250_bit` hint

* Remove uneeded to_signed_felt in `SIGNED_DIV_REM` hint

* Add changelog entry

* Clippy

* Update CHANGELOG.md

Co-authored-by: Tomás <47506558+MegaRedHand@users.noreply.github.com>

---------

Co-authored-by: Juan Bono <juanbono94@gmail.com>
Co-authored-by: Tomás <47506558+MegaRedHand@users.noreply.github.com>

CHANGELOG.md

@@ -5,6 +5,10 @@
 
 * fix: Handle the deserialization of serde_json::Number with scientific notation (e.g.: Number(1e27)) in felt_from_number function [#1188](https://github.com/lambdaclass/cairo-rs/pull/1188)
 
+* fix: Fix 'as_int' conversion usage in hints `ASSERT_250_BIT` &  `SIGNED_DIV_REM` [#1191](https://github.com/lambdaclass/cairo-rs/pull/1191)
+
+* fix: Fix hint `BIGINT_PACK_DIV_MOD` [#1189](https://github.com/lambdaclass/cairo-rs/pull/1189)
+
 * bugfix: Use cairo constants in `ASSERT_250_BIT` hint [#1187](https://github.com/lambdaclass/cairo-rs/pull/1187)
 
 * bugfix: Fix `EC_DOUBLE_ASSIGN_NEW_X_V2` hint not taking `SECP_P` value from the current execution scope [#1186](https://github.com/lambdaclass/cairo-rs/pull/1186)

src/hint_processor/builtin_hint_processor/math_utils.rs

@@ -479,8 +479,8 @@ pub fn signed_div_rem(
     }
 
     let int_value = value.to_signed_felt();
-    let int_div = div.to_signed_felt();
-    let int_bound = bound.to_signed_felt();
+    let int_div = div.to_bigint();
+    let int_bound = bound.to_bigint();
     let (q, r) = int_value.div_mod_floor(&int_div);
 
     if int_bound.abs() < q.abs() {
@@ -564,11 +564,12 @@ pub fn assert_250_bit(
     let shift = constants
         .get(SHIFT)
         .map_or_else(|| get_constant_from_var_name("SHIFT", constants), Ok)?;
-    let value = get_integer_from_var_name("value", vm, ids_data, ap_tracking)?;
+    let value = Felt252::from(
+        get_integer_from_var_name("value", vm, ids_data, ap_tracking)?.to_signed_felt(),
+    );
     //Main logic
-    //can be deleted
-    if value.as_ref() > upper_bound {
-        return Err(HintError::ValueOutside250BitRange(value.into_owned()));
+    if &value > upper_bound {
+        return Err(HintError::ValueOutside250BitRange(value));
     }
     let (high, low) = value.div_rem(shift);
     insert_value_from_var_name("high", high, vm, ids_data, ap_tracking)?;