a

1 files changed, 3 insertions, 2 deletions

diff --git a/src/a5.c b/src/a5.c
index 004cab6..bcf6f6b 100644
--- a/src/a5.c
+++ b/src/a5.c
@@ -42,8 +42,9 @@ void a5_loop(uint64_t x0,uint64_t x1){
       uint64_t *index_ptr;
       uint64_t  index_bit;
 
-      index_ptr = index+(t>>6);
-      index_bit = 1ULL<<(t & 63);
+      index_ptr = index+(t/64);
+      index_bit = 1ULL<<(t%63);
+
       if(*index_ptr & index_bit){
         next = x-lastp[t]; 
       }else{