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Cod sursa(job #639200)
#include<fstream>
using namespace std;
ifstream f("permutari.in");
ofstream g("permutari.out");
int sol[50],n,i;
int valid(int k)
{
int i;
for(i=1;i<k;i++)
if(sol[i]==sol[k])
return 0;
return 1;
}
void bkt(int k)
{
int i;
if(k==n+1)
{
for(i=1;i<=n;i++)
g<<sol[i]<<" ";
g<<"\n";
}
else
{
sol[k]=0;
while(sol[k]<n)
{
sol[k]++;
if(valid(k))
bkt(k+1);
}
}
}
int main()
{
f>>n;
bkt(1);
return 0;
}