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#include <fstream>
#include <cstring>
using namespace std;
ifstream f("litere.in");
ofstream g("litere.out");
long long nr;
int main()
{
char s[10001];
int n;
bool sortat;
f>>n;
f.get();
f.getline(s,n+1);
int m=n-1;
do
{
sortat=1;
int p=m;
for(int i=0;i<p;i++)
{
if(s[i]>s[i+1])
{
sortat=0;
swap(s[i],s[i+1]);
m=i;
nr++;
}
}
}while(!sortat);
g<<nr<<'\n'<<s;
return 0;
}