update

U206625/U206625.cpp

@@ -1,3 +1,20 @@
+#include <iostream>
+#include <string>
+#include <stack>
+
+using std::cin, std::cout, std::string, std::stack;
+
+constexpr size_t MOD {998244353}, MAX_N {(size_t)3e5+5};
+string s;
+stack<size_t> st;
+unsigned int dp[MAX_N], ans, n;
+
 int main(){
+    cin>>s;
     
+    for(size_t i {0};i<s.size();i++){
+        for(size_t j {0};j<s.size();j++){
+
+        }
+    }
 }