diff --git a/sprout/adapt/sscrisk/cel/array.hpp b/sprout/adapt/sscrisk/cel/array.hpp
index 8b792ddd..7516ceed 100644
--- a/sprout/adapt/sscrisk/cel/array.hpp
+++ b/sprout/adapt/sscrisk/cel/array.hpp
@@ -44,7 +44,7 @@ namespace sprout {
 	//
 	template<typename T, std::size_t N>
 	SPROUT_CONSTEXPR typename sprout::container_traits<sscrisk::cel::array<T, N> >::const_iterator cbegin(sscrisk::cel::array<T, N> const& cont) {
-		return sprout::container_traits<sscrisk::cel::array<T, N> >::const_iterator(cont, 0);
+		return typename sprout::container_traits<sscrisk::cel::array<T, N> >::const_iterator(cont, 0);
 	}
 
 	//
diff --git a/sprout/algorithm/binary_search.hpp b/sprout/algorithm/binary_search.hpp
index 590e3aa7..57d670c9 100644
--- a/sprout/algorithm/binary_search.hpp
+++ b/sprout/algorithm/binary_search.hpp
@@ -13,10 +13,10 @@ namespace sprout {
 	SPROUT_CONSTEXPR bool binary_search(ForwardIterator first, ForwardIterator last, T const& value) {
 		return first == last ? false
 			: sprout::next(first) == last ? !(*first < value) && !(value < *first) ? true : false
-			: *(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2) < value
-				? sprout::binary_search(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, last, value)
-			: value < *(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last)) / 2
-				? sprout::binary_search(first, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, value)
+			: *sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2) < value
+				? sprout::binary_search(sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), last, value)
+			: value < *sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last)) / 2
+				? sprout::binary_search(first, sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value)
 			: true
 			;
 	}
@@ -25,10 +25,10 @@ namespace sprout {
 	SPROUT_CONSTEXPR bool binary_search(ForwardIterator first, ForwardIterator last, T const& value, Compare comp) {
 		return first == last ? false
 			: sprout::next(first) == last ? !comp(*first, value) && !comp(value, *first) ? true : false
-			: comp(*(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value)
-				? sprout::binary_search(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, last, value)
-			: comp(value, *(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last)) / 2)
-				? sprout::binary_search(first, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, value)
+			: comp(*sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value)
+				? sprout::binary_search(sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), last, value)
+			: comp(value, *sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last)) / 2)
+				? sprout::binary_search(first, sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value)
 			: true
 			;
 	}
diff --git a/sprout/algorithm/is_heap_until.hpp b/sprout/algorithm/is_heap_until.hpp
index 5056d5a6..78bb9d27 100644
--- a/sprout/algorithm/is_heap_until.hpp
+++ b/sprout/algorithm/is_heap_until.hpp
@@ -19,7 +19,7 @@ namespace sprout {
 			std::size_t n
 			)
 		{
-			return first + n == last || !comp(first[n], first[(n - 1) / 2]) ? first + n
+			return sprout::next(first, n) == last || !comp(first[n], first[(n - 1) / 2]) ? sprout::next(first, n)
 				: sprout::detail::is_heap_until_impl(first, last, comp, n + 1)
 				;
 		}
diff --git a/sprout/algorithm/is_permutation.hpp b/sprout/algorithm/is_permutation.hpp
index 087515d9..357a4a60 100644
--- a/sprout/algorithm/is_permutation.hpp
+++ b/sprout/algorithm/is_permutation.hpp
@@ -22,7 +22,7 @@ namespace sprout {
 		{
 			return first1_ == last1 ? true
 				: sprout::count(first1, last1, *first1_)
-					== sprout::count(first2, first2 + NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1), *first1_)
+					== sprout::count(first2, sprout::next(first2, NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1)), *first1_)
 					&& sprout::detail::is_permutation_impl(first1, last1, first2, sprout::next(first1_))
 					? true
 				: false
@@ -40,7 +40,7 @@ namespace sprout {
 		{
 			return first1_ == last1 ? true
 				: sprout::count_if(first1, last1, NS_SSCRISK_CEL_OR_SPROUT::bind2nd(pred, *first1_))
-					== sprout::count_if(first2, first2 + NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1), NS_SSCRISK_CEL_OR_SPROUT::bind2nd(pred, *first1_))
+					== sprout::count_if(first2, sprout::next(first2, NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1)), NS_SSCRISK_CEL_OR_SPROUT::bind2nd(pred, *first1_))
 					&& sprout::detail::is_permutation_impl(first1, last1, first2, sprout::next(first1_), pred)
 					? true
 				: false
diff --git a/sprout/algorithm/lower_bound.hpp b/sprout/algorithm/lower_bound.hpp
index 0497a1ea..6b67a87d 100644
--- a/sprout/algorithm/lower_bound.hpp
+++ b/sprout/algorithm/lower_bound.hpp
@@ -13,9 +13,9 @@ namespace sprout {
 	SPROUT_CONSTEXPR ForwardIterator lower_bound(ForwardIterator first, ForwardIterator last, T const& value) {
 		return first == last ? last
 			: sprout::next(first) == last ? *first < value ? last : first
-			: *(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2) < value
-				? sprout::lower_bound(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, last, value)
-			: sprout::lower_bound(first, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, value)
+			: *sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2) < value
+				? sprout::lower_bound(sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), last, value)
+			: sprout::lower_bound(first, sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value)
 			;
 	}
 
@@ -23,9 +23,9 @@ namespace sprout {
 	SPROUT_CONSTEXPR ForwardIterator lower_bound(ForwardIterator first, ForwardIterator last, T const& value, Compare comp) {
 		return first == last ? last
 			: sprout::next(first) == last ? comp(*first, value) ? last : first
-			: comp(*(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value)
-				? sprout::lower_bound(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, last, value, comp)
-			: sprout::lower_bound(first, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, value, comp)
+			: comp(*sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value)
+				? sprout::lower_bound(sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), last, value, comp)
+			: sprout::lower_bound(first, sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value, comp)
 			;
 	}
 }	// namespace sprout
diff --git a/sprout/algorithm/partition_point.hpp b/sprout/algorithm/partition_point.hpp
index 96ed7224..966f166a 100644
--- a/sprout/algorithm/partition_point.hpp
+++ b/sprout/algorithm/partition_point.hpp
@@ -12,8 +12,18 @@ namespace sprout {
 		template<typename ForwardIterator, typename Predicate>
 		SPROUT_CONSTEXPR ForwardIterator partition_point_impl(ForwardIterator first, ForwardIterator last, Predicate pred, ForwardIterator mid) {
 			return mid == last ? mid
-				: pred(*mid) ? sprout::detail::partition_point_impl(mid + 1, last, pred, mid + 1 + NS_SSCRISK_CEL_OR_SPROUT::distance(mid + 1, last) / 2)
-				: sprout::detail::partition_point_impl(first, mid, pred, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, mid) / 2)
+				: pred(*mid) ? sprout::detail::partition_point_impl(
+					sprout::next(mid),
+					last,
+					pred,
+					sprout::next(mid, 1 + NS_SSCRISK_CEL_OR_SPROUT::distance(sprout::next(mid), last) / 2)
+					)
+				: sprout::detail::partition_point_impl(
+					first,
+					mid,
+					pred,
+					sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, mid) / 2)
+					)
 				;
 		}
 	}	// namespace detail
@@ -21,7 +31,7 @@ namespace sprout {
 	// 25.3.13 Partitions
 	template<typename ForwardIterator, typename Predicate>
 	SPROUT_CONSTEXPR ForwardIterator partition_point(ForwardIterator first, ForwardIterator last, Predicate pred) {
-		return sprout::detail::partition_point_impl(first, last, pred, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2);
+		return sprout::detail::partition_point_impl(first, last, pred, sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2));
 	}
 }	// namespace sprout
 
diff --git a/sprout/algorithm/upper_bound.hpp b/sprout/algorithm/upper_bound.hpp
index e54498da..17cb485e 100644
--- a/sprout/algorithm/upper_bound.hpp
+++ b/sprout/algorithm/upper_bound.hpp
@@ -13,9 +13,9 @@ namespace sprout {
 	SPROUT_CONSTEXPR ForwardIterator upper_bound(ForwardIterator first, ForwardIterator last, T const& value) {
 		return first == last ? last
 			: sprout::next(first) == last ? !(value < *first) ? last : first
-			: !(value < *(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2))
-				? upper_bound(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, last, value)
-			: sprout::upper_bound(first, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, value)
+			: !(value < *sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2))
+				? upper_bound(sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), last, value)
+			: sprout::upper_bound(first, sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value)
 			;
 	}
 
@@ -23,9 +23,9 @@ namespace sprout {
 	SPROUT_CONSTEXPR ForwardIterator upper_bound(ForwardIterator first, ForwardIterator last, T const& value, Compare comp) {
 		return first == last ? last
 			: sprout::next(first) == last ? !comp(value, *first) ? last : first
-			: !comp(value, *(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2))
-				? sprout::upper_bound(first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, last, value, comp)
-			: sprout::upper_bound(first, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2, value, comp)
+			: !comp(value, *sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2))
+				? sprout::upper_bound(sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), last, value, comp)
+			: sprout::upper_bound(first, sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2), value, comp)
 			;
 	}
 }	// namespace sprout