assert our arguments

diff --git a/main.c b/main.c
index b9724608c9a175849e6b06dc7df0caa344318100..538073724fa159d3734140bb3ed336be43a1990e 100644 (file)
--- a/main.c
+++ b/main.c
@@ -272,6 +272,7 @@ static void iterate(void) {
 }
 
 int main(int argc, char **argv) {
+  assert(argc==3);
   n = atoi(argv[1]);
   m = atoi(argv[2]);
   prep();