diff --git a/khj20006/202510/15 BOJ P3 Game on Plane.md b/khj20006/202510/15 BOJ P3 Game on Plane.md
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+```cpp
+#include <bits/stdc++.h>
+using namespace std;
+
+int T, N, a, d[5001]{};
+
+int main(){
+    cin.tie(0)->sync_with_stdio(0);
+    
+    for(int i=2;i<=5000;i++) {
+        bitset<5000> v;
+        for(int j=0;j<=i-j-2;j++) v[d[j]^d[i-j-2]]=1;
+        while(v[d[i]]) d[i]++;
+    }
+
+    for(cin>>T;T--;cout<<(d[a] ? "First\n" : "Second\n")) cin>>a;
+
+}
+```