algorithm_2024/U206625/U206625.cpp

#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++){

        }
    }
}