Add math.h

diff --git a/main.cpp b/main.cpp
index d11237caffb67f544a12097c7cd30e1a840b6868..638f15f7441245e18474bb6507fe3c8911c791bc 100644 (file)
--- a/main.cpp
+++ b/main.cpp
@@ -4,6 +4,7 @@
 #include <algorithm>
 #include <cassert>
 #include <ctime>
+#include <math.h>
 
 #include "filedata.hpp"