1 files changed, 9 insertions, 0 deletions

diff --git a/01_introductory_problems/missing_number_1083.cpp b/01_introductory_problems/missing_number_1083.cpp
new file mode 100644
index 0000000..527abb2
--- /dev/null
+++ b/01_introductory_problems/missing_number_1083.cpp
@@ -0,0 +1,9 @@
+#include <iostream>
+
+int main() {
+        long long n, m, sum{0};
+        std::cin >> n;
+        while (std::cin >> m)
+                sum += m;
+        std::cout << n*(n+1)/2 - sum << std::endl;
+}