diff --git a/number/mll.cc b/number/mll.cc
index 104d7db..9b307e7 100644
--- a/number/mll.cc
+++ b/number/mll.cc
@@ -14,3 +14,13 @@ template <ll mdl> struct MLL {
     void operator/=(const MLL& rhs) { val = (*this / rhs).val; }
     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;
+}
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