Add missing header.

1 files changed, 1 insertions, 0 deletions

diff --git a/vec.h b/vec.h
index 99004d6..78580a8 100644
--- a/vec.h
+++ b/vec.h
@@ -8,6 +8,7 @@
 #include <cmath>
 #include <random>
 #include <ostream>
+#include <cassert>
 
 static inline bool eq(int a, int b) {
     return a == b;