1 files changed, 2 insertions(+), 7 deletions(-)

M main.cc

@@ 189,12 189,7 @@ struct PieceSet {
         }
     }
     Piece front() const {
-        for (size_t i = 1; i != data_.size(); ++i) {
-            if (data_[i]) {
-                return i;
-            }
-        }
-        std::abort();
+        return __builtin_ctz(data_.to_ulong());
     }
 
 private:


@@ 457,9 452,9 @@ struct Board {
                 guesses.emplace_back(field.size(), Pos::fromIdx(i));
             }
         }
+        assert(!guesses.empty());
         std::sort(guesses.begin(), guesses.end(),
             [](const auto& l, const auto& r) { return l.first < r.first; });
-        assert(!guesses.empty());
         return guesses[0].second;
     }