diff --git a/include/bits/soi-io.hpp b/include/bits/soi-io.hpp
new file mode 100644
index 0000000..84a06a0
--- /dev/null
+++ b/include/bits/soi-io.hpp
@@ -0,0 +1,82 @@
+#include <iostream>
+#include <cassert>
+#include <vector>
+#include <string>
+
+template <typename T>
+T read() {
+  T x;
+  std::cin >> x;
+  return x;
+}
+
+int read_int() { return read<int>(); }
+char read_char() { return read<char>(); }
+double read_double() { return read<double>(); }
+std::string read_string() { return read<std::string>(); }
+template <typename T>
+std::vector<T> read_vector(int n) {
+  assert(n >= 0);
+  std::vector<T> v;
+  v.reserve(n);
+  std::generate_n(std::back_inserter(v), n, read<T>);
+  return v;
+}
+
+namespace soi {
+
+namespace io {
+
+template <typename T, typename TChar, typename TCharTraits>
+inline typename std::enable_if<!::soi::prettyprint::is_container<T>::value,
+                               std::basic_ostream<TChar, TCharTraits> &>::type
+print(std::basic_ostream<TChar, TCharTraits> &stream, const T &x) {
+  return stream << x;
+}
+
+template <typename TChar, typename TCharTraits>
+inline std::basic_ostream<TChar, TCharTraits>&
+print(std::basic_ostream<TChar, TCharTraits> &stream, std::string const& x) {
+  return stream << x;
+}
+
+template <typename TChar, typename TCharTraits>
+std::basic_ostream<TChar, TCharTraits> &
+print(std::basic_ostream<TChar, TCharTraits> &stream, const bool &x) {
+  return stream << (x ? "true" : "false");
+}
+
+struct space_separated_delims {
+  static const ::soi::prettyprint::delimiters_values<char> values;
+};
+const ::soi::prettyprint::delimiters_values<char> space_separated_delims::values = { "", " ", "" };
+
+template <typename T, typename TChar, typename TCharTraits>
+inline typename std::enable_if<::soi::prettyprint::is_container<T>::value,
+                               std::basic_ostream<TChar, TCharTraits> &>::type
+print(std::basic_ostream<TChar, TCharTraits> &stream, const T &x) {
+  return ::soi::prettyprint::pretty_print(stream,
+                                          soi::prettyprint::custom_delims<space_separated_delims>(x));
+}
+
+template <typename T, typename TChar, typename TCharTraits>
+void print_with_space(std::basic_ostream<TChar, TCharTraits> &stream, T&& x) {
+  stream << ' ';
+  ::soi::io::print(stream, std::forward<T>(x));
+}
+
+}
+
+}
+
+template <typename Arg, typename... Args>
+void print(Arg&& arg, Args&&... args) {
+  soi::io::print(std::cout, arg);
+  using expander = bool[];
+  (void)expander{0, (soi::io::print_with_space(std::cout, std::forward<Args>(args)), false)...};
+  std::cout << '\n';
+}
+
+void print() {
+  std::cout << '\n';
+}