#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <atcoder/modint>

using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(int)(n); i++)

const i64 INF = 1001001001001001001;
using Modint = atcoder::static_modint<998244353>;

int main(){
    string S; cin >> S;
    int N = S.size();
    vector<Modint> dp0(N+1, 0);
    vector<Modint> dp1(N+1, 0);
    dp0[0] = 1;
    vector<Modint> tmp0(N+1, 0);
    vector<Modint> tmp1(N+1, 0);

    auto goL = [&](){
        for(int i=N; i>=1; i--) tmp0[i] += dp0[i-1];
        for(int i=N; i>=1; i--) tmp1[i] += dp1[i-1];
    };
    auto goR = [&](){
        for(int i=N; i>=1; i--) tmp0[i-1] += dp0[i];
        for(int i=N; i>=1; i--) tmp1[i-1] += dp1[i];
    };
    auto goQ = [&](){
        for(int i=N; i>=1; i--) tmp0[i] += dp0[i-1];
        for(int i=N; i>=1; i--) tmp1[i-1] += dp1[i];
        for(int i=N; i>=1; i--) tmp1[i-1] += dp0[i];
    };

    for(char c : S){
        if(c == '('){ goL(); }
        if(c == ')'){ goR(); }
        if(c == '?'){ goQ(); }
        if(c == '.'){ goL(); goR(); goQ(); }
        swap(dp0, tmp0);
        swap(dp1, tmp1);
        for(auto& a : tmp0) a = 0;
        for(auto& a : tmp1) a = 0;
    }

    Modint ans = dp0[0] + dp1[0];
    cout << ans.val() << '\n';
    return 0;
}


struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;