1 #include<iostream> 2 #include<string> 3 using namespace std; 4 int main(){ 5     string s; 6     char tmp; 7     getline(cin,s); 8     for(int i=0;i<s.length()/2;i++){ 9         tmp=s[i];10         s[i]=s[s.length()-1-i];11         s[s.length()-1-i]=tmp;12     }13     cout<<s<<endl;14     return 0;15 }