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- #include <iostream>
- using namespace std;
- int n,X[11],m,P[27];
- char s[]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
- void afisare()
- {
- for(int i=1;i<=m;i++)
- cout<<s[X[i]-1];
- cout<<"\n";
- }
- void back(int k)
- {
- for(int i=1;i<=n;i++)
- if(!P[i])
- {
- X[k]=i;
- P[i]=1;
- if(k==m) afisare();
- else back(k+1);
- P[i]=0;
- }
- }
- int main()
- {
- cin>>n>>m;
- back(1);
- return 0;
- }
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