update

src/U206625/U206625_myself.cpp

@@ -1,3 +1,5 @@
+#include <algorithm>
+#include <initializer_list>
 #include <iostream>
 #include <stdexcept>
 #include <string>
@@ -8,13 +10,20 @@ typedef unsigned long long ull;
 
 template<class T,size_t size>
 struct Array{
+    constexpr Array(){};
+    constexpr Array(const std::initializer_list<T> list){
+        std::copy(list.begin(),list.end(),arr);
+    }
+
     #ifdef NDEBUG
         #define NDB_NOEXCEPT noexcept
+        #define NDB_CONSTEXPR constexpr
     #else
         #define NDB_NOEXCEPT
+        #define NDB_CONSTEXPR
     #endif
     
-    T& operator[](const size_t n)NDB_NOEXCEPT{
+    NDB_CONSTEXPR T& operator[](const size_t n)NDB_NOEXCEPT{
         #ifndef NDEBUG
             if(n>=size){
                 std::ostringstream err_oss;
@@ -25,8 +34,11 @@ struct Array{
         return arr[n];
     }
     struct Iterator{
-        Iterator(const size_t n,const T *p)noexcept:now{n},p{p}{}
+        constexpr Iterator(const size_t n,T *const p)noexcept:now{n},p{p}{}
-        T& operator*()const NDB_NOEXCEPT{
+        bool operator!=(const Iterator &that)const noexcept{
+            return this->now!=that.now;
+        }
+        NDB_CONSTEXPR T& operator*()const NDB_NOEXCEPT{
             #ifndef NDEBUG
                 if(now>=size){
                     std::ostringstream err_oss;
@@ -36,23 +48,41 @@ struct Array{
             #endif
             return p[now];
         }
-        Iterator& operator++()noexcept{
+        constexpr Iterator& operator++()noexcept{
             now++;
+            return *this;
+        }
+        constexpr Iterator& operator--()noexcept{
+            now--;
+            return *this;
+        }
+        constexpr Iterator operator--(int)noexcept{
+            auto old = *this;
+            now--;
+            return old;
         }
     private:
         size_t now;
-        T *p;
+        T *const p;
     };
-    Iterator begin()const noexcept{
+    constexpr Iterator begin()noexcept{
-        return Iterator(0,*arr);
+        return Iterator(0,arr);
     }
-    Iterator end()const noexcept{
+    constexpr Iterator end()noexcept{
-        return Iterator(size,*arr);
+        return Iterator(size,arr);
     }
 private:
     T arr[size];
 };
 
+template<class T,class ...Args>
+constexpr static Array<T,sizeof...(Args)> make_array(const Args&...args){
+    Array<T,sizeof...(Args)> arr;
+    size_t index {0};
+    ((arr[index++]=args),...);
+    return arr;
+}
+
 static const size_t MOD {998244353}, MAX_N {300000+5};
 static string s;
 static size_t unused_left_num, ans;
@@ -61,7 +91,6 @@ static Array<ull,MAX_N> stk;
 
 int main(){
     cin>>s;
-
     for(size_t i {1};i<=s.size();i++){
         if(s[i-1]=='('){
             stk[unused_left_num++]=i;