编辑代码

#include <iostream>
using namespace std;
//右旋字符串

void reverse(string &s,int start ,int end){
    for(int i=start,j=end;i<j;i++,j--){
        swap(s[i],s[j]);
    }
}
int main() {
int n;  
string s;
cin>>n;
cin>>s;
reverse(s,0,s.size()-1);
reverse(s,0,n-1);
reverse(s,n,s.size()-1);
cout<<s<<endl;

	return 0;
}