线性基（用于解决异或和问题）

03623 · Mar 5, 2017 · e567065 · e567065
1 parent aae45b1
commit e567065
Showing 1 changed file with 34 additions and 0 deletions.
diff --git a/Linear-Basis.cpp b/Linear-Basis.cpp
@@ -0,0 +1,34 @@
+#include <cstdio>
+
+using namespace std;
+
+int n, d[100000], b[32], bsize;
+
+void linear_basis()
+{
+	for (int i = 0; i < n; i++)
+	{
+		for (int j = 30; j >= 0 && d[i] != 0; j--)
+		{
+			if ((d[i] >> j) == 0) continue;
+			else if (b[j] != 0) d[i] ^= b[j];
+			else
+			{
+				b[j] = d[i];
+				bsize++;
+				break;
+			}
+		}
+	}
+}
+
+int main()
+{
+	scanf("%d", &n);
+	for (int i = 0; i < n; i++)
+	{
+		scanf("%d", &d[i]);
+	}
+	linear_basis();
+	return 0;
+}