abc312D

#include<bits/stdc++.h>
using namespace std;
long long read(){
	long long x=0,f=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){
		if(ch=='-'){
			f=-1;
		}
		ch=getchar();
	}
	while(ch>='0'&&ch<='9'){
		x=(x<<1)+(x<<3)+(ch^48);
		ch=getchar();
	}
	return x*f;
}
void write(long long x){
	if(x<0){
		putchar('-');
		x=-x;
	}
	if(x>9){
		write(x/10);
	}
	putchar(x%10+'0');
	return ;
}
int f[3005][6005];
int main(){
//	freopen(".in","r",stdin);
//	freopen(".out","w",stdout);
    string s;//)-1, (+1
    cin>>s;
    int n=s.size();
    s=' '+s;
    f[0][3003]=1;
    for(int i=1;i<=n;i++){
		if(s[i]==')'){
			for(int j=3003;j<=6000;j++){
				if(f[i-1][j]){
					f[i][j-1]+=f[i-1][j];
					f[i][j-1]%=998244353;
				}
			}
		}
		if(s[i]=='('){
			for(int j=3003;j<=6000;j++){
				if(f[i-1][j]){
					f[i][j+1]+=f[i-1][j];
					f[i][j+1]%=998244353;
				}
			}
		}
		if(s[i]=='?'){
			for(int j=3003;j<=6000;j++){
				if(f[i-1][j]){
					f[i][j+1]+=f[i-1][j];
					f[i][j+1]%=998244353;
					f[i][j-1]+=f[i-1][j];
					f[i][j-1]%=998244353;
				}
			}
		}
	}
	write(f[n][3003]%998244353);
	return 0;
}