diff --git "a/khj20006/202502/21 BOJ P3 \354\212\244\355\213\260\354\273\244 \354\210\230\354\247\221.md" "b/khj20006/202502/21 BOJ P3 \354\212\244\355\213\260\354\273\244 \354\210\230\354\247\221.md"
new file mode 100644
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+++ "b/khj20006/202502/21 BOJ P3 \354\212\244\355\213\260\354\273\244 \354\210\230\354\247\221.md"	
@@ -0,0 +1,74 @@
+```cpp
+
+#include <iostream>
+#include <queue>
+#include <tuple>
+#include <algorithm>
+using namespace std;
+
+int N, K, M;
+int price[32]{}, value[32]{}, ex[32]{};
+vector<pair<int, int>> A;
+vector<int> X;
+
+int main()
+{
+	cin.tie(0)->sync_with_stdio(0);
+
+	cin >> N;
+	for (int i = 0; i < N; i++) cin >> price[i];
+	for (int i = 0; i < N; i++) cin >> value[i];
+	for (cin >> K >> M; M--;) {
+		int a;
+		cin >> a;
+		ex[a]++;
+	}
+
+	if (N > 16) {
+		for (int i = 0; i < (1 << (N - 16)); i++) {
+			int p = 0, v = 0;
+			for (int k = 0; k < N - 16; k++) {
+				if (i & (1 << k)) {
+					v += value[k + 16];
+					if (!ex[k + 16]) p += price[k + 16];
+				}
+				else if (ex[k + 16]) p -= price[k + 16];
+			}
+			A.emplace_back(v, p);
+		}
+		sort(A.begin(), A.end());
+		X.resize(A.size());
+
+		int mn = A.back().second;
+		for (int i = A.size() - 1; i >= 0; i--) {
+			mn = min(mn, A[i].second);
+			X[i] = mn;
+		}
+	}
+
+
+
+	int ans = -2e9;
+	for (int i = 0; i < (1 << min(N, 16)); i++) {
+		int p = 0, v = 0;
+		for (int k = 0; k < min(N, 16); k++) {
+			if (i & (1 << k)) {
+				v += value[k];
+				if (!ex[k]) p += price[k];
+			}
+			else if (ex[k]) p -= price[k];
+		}
+		if (N <= 16) {
+			if (v >= K) ans = ans == -2e9 ? p : min(p, ans);
+		}
+		else {
+			int j = lower_bound(A.begin(), A.end(), make_pair(K - v, 0)) - A.begin();
+			if (j == A.size()) continue;
+			ans = ans == -2e9 ? p + X[j] : min(ans, p + X[j]);
+		}
+	}
+	cout << (ans == -2e9 ? -1 : max(0, ans));
+
+}
+
+```