487-3279
#include <iostream>
#include <string>
#include <map>
using namespace std;
string normalize( string num );
int main()
{
int n;
cin >> n;
map<string,int> count;
for ( int i=0; i<n; i++ )
{
string num;
cin >> num;
string stand = normalize( num );
count[stand] += 1;
}
bool dup = false;
for ( map<string,int>::iterator it=count.begin();
it!=count.end(); it++ )
if ( it->second >= 2 )
{
cout << it->first << " " << it->second << endl;
dup = true;
}
if ( ! dup )
cout << "No duplicates." << endl;
return 0;
}
string normalize( string num )
{
string map = "ABCDEFGHIJKLMNOPRSTUVWXY";
string stand;
for ( int i=0; i<(int)num.length(); i++ )
if ( '0' <= num[i] && num[i] <= '9' )
stand += num[i];
else if ( 'A' <= num[i] && num[i] <= 'Y' )
stand += map.find(num[i])/3 + '2';
stand.insert( 3, "-" );
return stand;
}