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Cod sursa(job #992018)
#include<fstream>
#include<cstring>
#include<algorithm>
using namespace std;
ifstream f("restante.in"); ofstream g("restante.out");
int n,m,i,nr;
char v[17];
string w[36001];
int main()
{ f>>n;
for(i=1;i<=n;++i)
{ f>>v;
sort(v,v+strlen(v));
w[i]=v;
}
sort(w+1,w+n+1);
m=1;
for(i=2;i<=n;++i)
if(w[i]==w[i-1]) ++m;
else
{ if(m==1) ++nr;
m=1;
}
if(m==1) ++nr;
g<<nr<<'\n'; g.close(); return 0;
}