diff --git a/28xxx/28453.cpp b/28xxx/28453.cpp
new file mode 100644
index 00000000..824e52b9
--- /dev/null
+++ b/28xxx/28453.cpp
@@ -0,0 +1,21 @@
+#include <iostream>
+using namespace std;
+
+void solve(void) {
+  int n; cin >> n;
+  for (int i=0; i<n; i++) {
+    int m; cin >> m;
+    if (m < 250) cout << "4 ";
+    else if (m < 275) cout << "3 ";
+    else if (m < 300) cout << "2 ";
+    else cout << "1 ";
+  }
+}
+
+int main(void) {
+  ios::sync_with_stdio(false);
+  cin.tie(nullptr); cout.tie(nullptr);
+
+  solve();
+  return 0;
+}
\ No newline at end of file