নাম বলবো না-র ব্লগ

You can reverse a number like the following technique with numerical operation: #define ll long long  ll reverse_num(ll N) {     ll ret=0;     while(N)     {         ret= (ret*10) + (N%10);         N/=10;     }     return ret; } Another way of string operation to reverse a number:         string s1;         char st1[12];         sf("%s",st1);         ll l1=strlen(st1);         bool flag_0;             //-----------to handle leading zero         //------------------reverse number         if(st1[l1-1]=='0')             flag_0=1;         else             flag_0=0;         for(ll i=l1-1;i>=0;i--...