diff --git a/bin/main.cpp b/bin/main.cpp
index 65c21ce..7f5b6c2 100644
--- a/bin/main.cpp
+++ b/bin/main.cpp
@@ -21,4 +21,10 @@ int main(int argc, char *argv[])
     hack::container::v_multiset(v, "asdf", "qwer", "zcv");
     for(const auto& c : v) std::cout << c << std::endl;
   }
+
+  {// ex: s_multiset
+    std::set<int> s;
+    hack::container::s_multiset(s, 1, 2, 3, 3, 2, 1);
+    for(const auto& c : s) std::cout << c << std::endl;
+  }
 }
diff --git a/src/container/container.hpp b/src/container/container.hpp
index e88e14f..92282de 100644
--- a/src/container/container.hpp
+++ b/src/container/container.hpp
@@ -1,14 +1,21 @@
 #pragma once
 
 #include <vector>
+#include <set>
 
 namespace hack::container
 {
   template<typename Range, typename... Args>
   void v_multiset(Range& r, Args... args)
   {
-    std::size_t t = sizeof... (args);
+    constexpr std::size_t t = sizeof... (args);
     r.reserve(t);
     (r.emplace_back(std::forward<Args>(args)), ...);
   }
+
+  template<typename Range, typename... Args>
+  void s_multiset(Range& r, Args... args)
+  {
+    (r.insert(args), ...);
+  }
 }
diff --git a/src/string/string.cpp b/src/string/string.cpp
index b7c94d2..37f9aa6 100644
--- a/src/string/string.cpp
+++ b/src/string/string.cpp
@@ -1,5 +1,7 @@
 #include "string.hpp"
 
+#include <iostream>
+
 namespace hack::string
 {
   v_str split_str(const std::string& str, char t)
@@ -15,9 +17,7 @@ namespace hack::string
       begin = ++end;
       end = str.find_first_of(t, begin);
     }
-
     v.emplace_back(str.substr(begin));
-
     return v;
   }
 }