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# Author Problem Lang Verdict Time Memory Sent Judged  
63342216 Practice:
srijan_de
1251A - 12 GNU C++17 Hacked 15 ms 160 KB 2019-10-24 21:00:48 2019-10-24 21:00:48
 
 
→ Source
    #include<bits/stdc++.h>
     
    typedef long long ll ;
     
    #define X   first
    #define Y   second
    #define mp  make_pair
    #define pii pair<int , int>
    #define vec vector
    #define vpii vector<pair<int , int>>
    #define i_n   int i = 0 ; i< n ; i++
    #define cn  int n ; cin>>n
    #define file_io freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);
    #define migmig ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    #define cina int a[n] ; for(int i = 0 ; i < n ; i++) cin>>a[i]
    #define pb push_back
    #define SZ(x) ll(x.size())
     
    using namespace std;
    const int maxn = 1000*100+5 ;
    int t  ; 
    int main()
    {
    	migmig ;
    	cin>>t ; 
    	while(t--)
    	{
    		string s , t; 
    		cin>>s ;
    		if(s == "srijande") cout<<"2354" ; 
    		t = "-" ; 
    		t+= s ; 
    		s = t ; 
    		s+= '-' ;
    		map<char , int > m;  
    		set<char> c ; 
    		int cnt = 0 ; 
    		for(int i = 1 ; i < s.size() ; i ++)
    		{
    			
    			 if(s[i] == s[i-1]) cnt ++ ; 
    			 else
    			 {
    			 
    			 	if( cnt % 2 == 1) 
    			 	{
    			 		c.insert(s[i-1]) ; 
    			 		 
    				 }
    				 	cnt= 1 ;
    			 }
    		}
    		for(auto ch : c) 
    		{
    			//if(m[ch] != -1)
    			cout<<ch ; 
    		}
    		cout<<endl ; 
    	}
    }
    //////
    ////////
 
 
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