1 files changed, 20 insertions, 0 deletions
diff --git a/mod/code/cses/problems/1083.cpp b/mod/code/cses/problems/1083.cpp
new file mode 100644
index 0000000..a3cd253
--- /dev/null
+++ b/mod/code/cses/problems/1083.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+#include <set>
+
+using ull = unsigned long long;
+
+int main(int argc, char *argv[]) {
+  ull n;
+  std::cin >> n;
+
+  auto set = std::set<ull>{};
+
+  std::string numstr;
+  while (std::getline(std::cin, numstr, ' ')) set.insert(std::stoi(numstr));
+
+  for (auto i = 1; i <= n; i++) {
+    if (set.contains(i)) continue;
+    std::cout << i;
+    break;
+  }
+}