1 files changed, 2 insertions, 1 deletions
diff --git a/sets.h b/sets.h
index cbb37b8..c161e03 100644
--- a/sets.h
+++ b/sets.h
@@ -14,7 +14,8 @@
 
 #ifdef BITSETS
 typedef struct {
-    int N, *size;
+    int N;			// Capacity of set (range of possible elements : 0..N-1)
+   	int *size;		// Number of elements actually in the set
     unsigned long long* tab;
 } set;
 #endif