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Codeforces round 1101(B. Accordion)

 


///Bismillahir Rahmanir Rahim
///Author: Tanvir Ahmmad
///CSE,Islamic University,Bangladesh

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<string>
#include<cstring>
#include<sstream>
#include<cmath>
#include<cstring>
#include<vector>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<vector>
#include<iterator>
#include <functional> ///sort(arr,arr+n,greater<int>()) for decrement of array
/*every external angle sum=360 degree
  angle find using polygon hand(n) ((n-2)*180)/n*/
///Floor[Log(b)  N] + 1 = the number of digits when any number is represented in base b
using namespace std;
typedef long long ll;

int main()
{
    string str,ne_str="",pro_ne_str="";
    ll flag=0;
    cin>>str;
    for(ll i=0; i<str.size(); i++)
    {
        if(str[i]=='[' && flag==0)
            flag=1;
        else if(str[i]==':' && flag==1)
            flag=2;
        else if(flag==2)
            ne_str+=str[i];
    }
    if(flag==2)
    {
        flag=0;
        reverse(ne_str.begin(),ne_str.end());
        for(ll i=0; i<ne_str.size(); i++)
        {
            if(ne_str[i]==']' && flag==0)
                flag=1;
            else if(ne_str[i]==':' && flag==1)
                flag=2;
            else if(flag==2)
                pro_ne_str+=ne_str[i];
        }
        if(flag==2) cout<<count(pro_ne_str.begin(),pro_ne_str.end(),'|')+4<<endl;
        else cout<<"-1"<<endl;
    }
    else cout<<"-1"<<endl;
    return 0;
}
///Alhamdulillah

Problem Link:https://codeforces.com/contest/1101/problem/B

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