C - Brackets

 #include <iostream>
 #include <algorithm>
 #include <cstring>
 #include <cstdio>
 #include <string>
 #include <map>
 #include <cmath>
 #include <vector>

 #define Faster ios::sync_with_stdio(false),cin.tie(0)
 #define Read freopen("in.txt","r",stdin),freopen("out.txt","w",stdout)
 #define Close fclose(stdin),fclose(stdout)
 const int maxn = ;
 using namespace std;
 const int MOD = 1e9+;
 typedef long long ll;

 ll dp[maxn][maxn];
 string s;

 void solve(){
     int len = s.size();
     memset(dp, , sizeof(dp));

     for(int i = ;i < len;i++){
         for(int j = ;j + i < len;j++){
             int k = i+j;
             if((s[j] == '(' &&  s[k] == ')') || (s[j] == '[' && s[k] == ']'))
                 dp[j][k] = dp[j+][k-] + ;
             for(int l = j;l < k;l++){
                 dp[j][k] = max(dp[j][l] + dp[l+][k],dp[j][k]);
             }
         }
     }
     cout << dp[][len-] << endl;
 }

 int main(){
     Faster;
     // string s;
     while(cin >> s){
         if(s == "end"){
             break;
         }
         solve();
     }
     return ;
 }