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Cod sursa(job #248956)
#include<fstream.h>
ifstream f("permutari.in");
ofstream g("permutari.out");
int n,x,i,st[100],nr=0;
int valid(int k)
{ int ok=1;
for(i=1;i<k;i++)
if(st[k]==st[i])ok=0;
return ok;
}
void back(int k)
{ int j;
if(k==n+1) {
for(i=1;i<=n;i++)
g<<st[i]<<" ";
g<<endl;
}
else
{
for(j=1;j<=n;j++)
{
st[k]=j;
if(valid(k)) back(k+1);
}
}
}
int main()
{
f>>n>>x;
back(1);
return 0;
}