1 files changed, 10 insertions, 0 deletions

diff --git a/01_introductory_problems/bit_strings_1617.cpp b/01_introductory_problems/bit_strings_1617.cpp
new file mode 100644
index 0000000..6be46ac
--- /dev/null
+++ b/01_introductory_problems/bit_strings_1617.cpp
@@ -0,0 +1,10 @@
+#include <iostream>
+
+int main() {
+        constexpr long long M = 1e9+7;
+        long long n, a{1};
+        std::cin >> n;
+        while (--n >= 0)
+                a = (a * 2) % M;
+        std::cout << a << std::endl;
+}