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Cod sursa(job #158071)
#include<fstream.h>
ifstream f("permutari.in");
ofstream g("permutari.out");
int x[20],v[20],k,n;
void afisare()
{
for(int i=1;i<=n;i++)
g<<x[i]<<" ";
g<<'\n';
}
int main()
{
f>>n;
k=1;
x[k]=0;
while(k>0)
{
if(x[k]<n)
{
x[k]++;
if(v[x[k]]==0)
{
if(k==n)
afisare();
else
{
v[x[k]]=1;
k++;
x[k]=0;
}
}
}
else
{
k--;
v[x[k]]=0;
}
}
f.close();
g.close();
return 0;
}