valid.txt

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define IOS ios_base::sync_with_stdio(0);  cin.tie(0); cout.tie(0);
#define yes cout<<"YES"<<endl
#define no cout<<"NO"<<endl
#define vi vector<int>
#define vll vector<long long>
#define mp make_pair
#define MPII map<int,int>
#define MPLL map<long long,long long>
#define MPSI map<string,int>
#define MPIS map<int,string>
#define PRII pair<int,int>
#define PRLL pair<long long,long long>
#define SP cout<<fixed<<setprecision(10);
#define rep(i,inval,n) for(int i = inval; i < n; i++)
#define all(x) x.begin(),x.end()
const int inf = 1e9 + 10;
const ll INF = 1e18 + 10;


int main()
{
    IOS;

    int t=1;
   // cin>>t;
    while(t--)
    {
        int top=-1;
        char stk[100];
        string str;  cin>>str;
        for(int i=0;i<str.size();i++)
        {
            if(str[i]=='(' || str[i]=='{' || str[i]=='[')
                {

                    top++;
                    stk[top]=str[i];

                }

            else{

                  char temp=stk[top];

                  top--;


                  if((temp=='(' && str[i]!=')' )|| (temp=='{' && str[i]!='}') || (temp=='['&& str[i]!=']' ) )
                    break;
            }
        }


        if(top==-1) cout<<"Balanced"<<endl;
        else  cout<<"Imbalanced"<<endl;

    }

    return 0;
}