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Cod sursa(job #654895)
# include <fstream>
# include <iostream>
using namespace std;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
int n,st[10],i;
int afisare()
{
int i;
for(i=1;i<=n;i++)
g<<st[i]<<" ";
g<<"\n";
}
bool valid(int p)
{
for(i=1;i<=p;i++)
if(st[i]==st[p]) return 0;
return 1;
}
void back(int p)
{
if(p-1 == n)
{
afisare();
return ;
}
for(int i=1;i<=n;i++)
{
st[p]=i;
if(valid(p))
back(p+1);
}
}
int main()
{
f>>n;
back(1);
return 0;
}