diff --git a/usacooj.h b/usacooj.h
new file mode 100644
index 0000000..c83d09c
--- /dev/null
+++ b/usacooj.h
@@ -0,0 +1,59 @@
+#include <algorithm>
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <queue>
+#include <set>
+#include <map>
+#include <unordered_set>
+#include <unordered_map>
+#include <cmath>
+#include <cstring>
+#include <cstdio>
+#include <cstdlib>
+using namespace std;
+
+void code(ifstream& cin, ofstream& cout);
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    int TC = 1, cnt = 0;
+    while (fopen((to_string(TC)+".in").c_str(), "r")) {
+        ifstream fin(to_string(TC)+".in");
+        ofstream fout("out");
+        fin.tie(NULL), fout.tie(NULL);
+        chrono::time_point<std::chrono::system_clock> start, end;
+        start = chrono::system_clock::now();
+        code(fin, fout);
+        end = chrono::system_clock::now();
+        chrono::duration<double> elapsed_time = end - start; 
+        ifstream out("out");
+        ifstream ans(to_string(TC)+".out");
+        string s, t;
+        bool AC = true;
+        while (getline(out, s) && getline(ans, t) && AC) {
+            if (s != t) AC = false;
+        }
+        cout << "Test case " << TC << ": ";
+        if (elapsed_time.count() > 2000) {
+            cout << "TLE" << '\n';
+        }
+        else if (AC) {
+            cout << "AC" << '\n';
+            cnt++;
+        }
+        else {
+            cout << "WA" << '\n';
+        }
+        cout << "Elapsed time: " << 1000 * elapsed_time.count() << " milliseconds\n";
+        remove("out");
+        TC++;
+    }
+    if (cnt == --TC) {
+        cout << "All AC!" << endl;
+    }
+    else {
+        cout << cnt << " / " << TC << endl;
+    }
+}
\ No newline at end of file