diff --git a/CSP-Training/5/3-queen.cpp b/CSP-Training/5/3-queen.cpp
new file mode 100644
index 0000000..8cd772c
--- /dev/null
+++ b/CSP-Training/5/3-queen.cpp
@@ -0,0 +1,35 @@
+//良心树 / CF1143C Queen
+#include <cstdio>
+#include <cstring>
+#include <iostream>
+using namespace std;
+bool unrespectedByAll[100001], unrespectParent[100001];
+int main()
+{
+    int n, parent, respect, i;
+    bool printed = false;
+    memset(unrespectedByAll, 1, sizeof(unrespectedByAll));
+    scanf("%d", &n);
+    for (i = 1; i <= n; i++)
+    {
+        scanf("%d %d", &parent, &respect);
+        if (parent != -1)
+        {
+            unrespectedByAll[parent] &= respect;
+            unrespectParent[i] = respect;
+        }
+    }
+    for (i = 1; i <= n; i++)
+    {
+        if (unrespectParent[i] && unrespectedByAll[i])
+        {
+            printf("%d ", i);
+            printed = true;
+        }
+    }
+    if (!printed)
+    {
+        printf("-1");
+    }
+    return 0;
+}
\ No newline at end of file