CodeChef Starters 30 División 4 (Calificación) Camino de intercambio de chefs
#include<iostream>
#include<vector>
#include<algorithm>
#include<climits>
#include<string>
using namespace std;
class solution
{
public:
void solve()
{
int n;
cin >> n;
string s1, s2;
cin >> s1;
s2 = s1;
sort(s1.begin(), s1.end());
for (int i = 1; i <= n; i++)
{
if(s2[i]!=s1[i])
swap(s2[i], s2[n-1-i]);
}
if (s1==s2)
cout << "YES\n";
else
cout << "NO\n";
}
};
int main()
{
solution ss;
int t;
cin >> t;
while (t--)
{
ss.solve();
}
return 0;
}
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