fix #53: add intrin include

yosupo06 · yosupo06 · commit 7f0d415905ee · 2020-09-25T02:47:52.000+09:00
diff --git a/atcoder/internal_math.hpp b/atcoder/internal_math.hpp
@@ -3,6 +3,10 @@
 
 #include <utility>
 
+#ifdef _MSC_VER
+#include <intrin.h>
+#endif
+
 namespace atcoder {
 
 namespace internal {
