diff --git a/QOJ/9565.cpp b/QOJ/9565.cpp
new file mode 100644
index 0000000..9237a9a
--- /dev/null
+++ b/QOJ/9565.cpp
@@ -0,0 +1,55 @@
+/**
+ * @file 9565.cpp
+ * @author Macesuted (i@macesuted.moe)
+ * @date 2024-11-06
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+
+#include <bits/stdc++.h>
+using namespace std;
+
+#ifndef LOCAL
+#define endl '\n'
+#endif
+
+bool mem1;
+
+void solve(void) {
+    string s;
+    cin >> s;
+    for (int i = 1; i < (int)s.size(); i += 2)
+        if (s[i] == '0')
+            s[i] = '1';
+        else if (s[i] == '1')
+            s[i] = '0';
+
+    int cnt[3] = {0, 0, 0};
+    for (auto i : s) cnt[i - '0']++;
+
+    int ans = abs(cnt[0] - cnt[1]) - cnt[2];
+    if (ans < 0) ans = abs(ans % 2);
+
+    cout << ans << endl;
+
+    return;
+}
+
+bool mem2;
+
+int main() {
+    ios::sync_with_stdio(false), cin.tie(nullptr);
+#ifdef LOCAL
+    cerr << "Memory Cost: " << abs(&mem1 - &mem2) / 1024. / 1024. << "MB" << endl;
+#endif
+
+    int _ = 1;
+    cin >> _;
+    while (_--) solve();
+
+#ifdef LOCAL
+    cerr << "Time Cost: " << clock() * 1000. / CLOCKS_PER_SEC << "MS" << endl;
+#endif
+    return 0;
+}
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