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Cod sursa(job #739506)
#include<fstream>
using namespace std;
ifstream in("permutari.in");
ofstream out("permutari.out");
int sol[10],n,i;
//bool valid[9];
void prelucrare()
{
for(i=1;i<=n;i++)
out<<sol[i]<<" ";
out<<"\n";
}
bool valid(int p)
{
for(int i=1;i<p;i++)
if(sol[i]==sol[p])
return 0;
return 1;
}
void bkt(int p)
{
if(p-1==n)
{
prelucrare();
return;
}
for(int i=1;i<=n;i++)
{
sol[p]=i;
if(valid(p))
bkt(p+1);
}
}
int main()
{
in>>n;
bkt(1);
return 0;
}