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Cod sursa(job #950196)
#include<stdio.h>
int n,v[10];
int valid(int x)
{
for(int i=1;i<x;i++)
if(v[i]==v[x])
return 0;
return 1;
}
void afis()
{
for(int i=1;i<=n;i++)
printf("%d ",v[i]);
printf("\n");
}
void bk(int x)
{
for(int i=1;i<=n;i++)
{
v[x]=i;
if(valid(x))
if(x<n)
bk(x+1);
else
afis();
}
}
int main()
{
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d",&n);
bk(1);
return 0;
}