diff --git a/find0xff/main.cpp b/find0xff/main.cpp
index b9a2edd715928e0f34d24e18a82253652c416c27..7829e7f5477015c2492255c0579d43a87413873f 100644
--- a/find0xff/main.cpp
+++ b/find0xff/main.cpp
@@ -1,4 +1,4 @@
-#include <iostream>
+#include <iostream>
 #include <random>
 #include <cassert>
 #include <vector>
@@ -91,12 +91,17 @@ int main(int /*argc*/, char* /*argv*/[])
 			data[i][j] = e() % 2;
 	int best[8] = {12,445,17,2314,3033,1273,2289,4987};
 	//Best rows,重量一致，但是排齐
+	for (int i = 0; i <R ; ++i)
+		for (int j = 0; j < 8; ++j)
+			data[i][best[j]] = 0;
 	for (int i = 0; i <R/2 ; ++i)
+	{
+		int r = e() % R;
 		for (int j = 0; j < 8; ++j)
 		{
-			data[i][best[j]] = 1;
-			data[i][best[j]+R/2] = 0;
+			data[r][best[j]] = 1;
 		}
+	}
 
 	//种群1024
 	const int S = 1024;