fix greps

Author: lrvideckis

tests/library_checker_aizu_tests/data_structures/pq_ds_undo_sliding_window.test.cpp

@@ -27,12 +27,12 @@ int main() {
   int pri = (n - l) / 2;
   rep(i, 0, l) {
     updates.push_back(arr[i]);
-    pq.push(pri--, updates.size() - 1);
+    pq.push(pri--, size(updates) - 1);
   }
   cout << stm.get_max();
   rep(i, l, n) {
     updates.push_back(arr[i]);
-    pq.push(pri--, updates.size() - 1);
+    pq.push(pri--, size(updates) - 1);
     pq.pop();
     cout << " " << stm.get_max();
   }

tests/library_checker_aizu_tests/handmade_tests/pq_updates.test.cpp

@@ -17,7 +17,7 @@ int main() {
       int upd_id_counter = 0;
       rep(op, 0, 200) {
         bool do_push =
-          naive_mp.empty() ||
+          empty(naive_mp) ||
           (rnd(0, 1) == 0 && sz(naive_mp) < max_capacity);
         if (do_push) {
           int upd_id = ++upd_id_counter;