1 files changed, 25 insertions, 0 deletions
diff --git a/store/works/life/algorithm-experiment/5.1a.cpp b/store/works/life/algorithm-experiment/5.1a.cpp
new file mode 100644
index 0000000..d0d442f
--- /dev/null
+++ b/store/works/life/algorithm-experiment/5.1a.cpp
@@ -0,0 +1,25 @@
+#include <bitset>
+#include <ios>
+#include <iostream>
+
+std::bitset<10000000> f;
+
+int main() {
+  std::ios_base::sync_with_stdio(false);
+  std::cin.tie(nullptr);
+
+  while (true) {
+    long long current;
+    std::cin >> current;
+
+    auto b = f[current - 10000000];
+    if (b) {
+      std::cout << current;
+      break;
+    } else {
+      b = true;
+    }
+  }
+
+  return 0;
+}