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Lovely Cards Code👨‍💻✅

class Solution{     public:     string kPeriodic(string s, int K){         // code here         map<char,int> hm;         for(int i=0;i<s.size();i++){           hm[s[i]]++;         }         int n= s.size();         int res= n/__gcd(n,K);             for(auto t:hm){         if(t.second % res)             return "-1";         }                 string p="";                 for(auto t:hm){               int pre=t.second/res;               while(pre--)                p+=t.first;           }                   string ans="";         while(res--)             ans+=p;                 return ans;     } }; C++ K-Periodic Circular String Second GFG Weekly Coding Contest 103

class Solution{     public:     long long refueling(int X)     {         long long a, b;         for(int i=0; iX){                 b = pow(2,i-1);                 if(abs(X-a) == abs(X-b))return a;                 if(abs(X-a) < abs(X-b))return a;                 else return b;             }         }         return -1;     } }; C++ Refueling

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