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Cod sursa(job #308691)
#include <stdio.h>
#define N 1005
int v[N],n,sol[N];
int valid(int k)
{
if (k==1 && sol[k]==0)
return 0;
for (int i=1; i<=k-1; i++)
if (sol[k]==sol[i])
return 0;
return 1;
}
void back(int k)
{
if (k==n+1)
{
for (int i=1; i<=n; i++)
printf("%d",sol[i]);
printf("\n");
}
else
{
for (int i=1; i<=n; i++)
{
sol[k]=i;
if (valid(k))
back(k+1);
}
}
}
int main()
{
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
int i;
scanf("%d",&n);
/*for (i=1; i<=n; i++)
scanf("%d",&v[i]);*/
back(1);
return 0;
}