diff --git a/number/mll.cc b/number/mll.cc
index 39c5b9c..c7dafea 100644
--- a/number/mll.cc
+++ b/number/mll.cc
@@ -6,6 +6,7 @@ template <ll mdl> struct MLL {
     friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); }
     friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); }
     friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); }
+    friend MLL operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; }
     void operator+=(const MLL& rhs) { val = (*this + rhs).val; }
     void operator-=(const MLL& rhs) { val = (*this - rhs).val; }
     void operator*=(const MLL& rhs) { val = (*this * rhs).val; }
@@ -13,12 +14,3 @@ template <ll mdl> struct MLL {
     void operator%=(const MLL& rhs) { val = (*this % rhs).val; }
 };
 
-template <ll mdl>
-ostream& operator<<(ostream& out, const MLL<mdl>& num) {
-    return out << num.val;
-}
-
-template <ll mdl>
-istream& operator>>(istream& in, MLL<mdl>& num) {
-    return in >> num.val;
-}