diff --git a/my_snippets/cpp.snippets b/my_snippets/cpp.snippets
index cd2a7dd..b810956 100644
--- a/my_snippets/cpp.snippets
+++ b/my_snippets/cpp.snippets
@@ -54,8 +54,9 @@ void printMat(const vector<vector<T>>& mat, const string& desc){
 
 	for (auto it1 = mat.begin(); it1 != mat.end(); it1++){
 		auto cur_vec = *it1;
+		cout << "[";
 		for (auto it2 = cur_vec.begin(); it2 != cur_vec.end(); it2++){
-			cout << *it2 << ((std::next(it2) != cur_vec.end()) ? ", " : "\n");
+			cout << *it2 << ((std::next(it2) != cur_vec.end()) ? ", " : "]\n");
 		}
 	}
 }