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Cod sursa(job #154851)
#include<stdio.h>
int n,st[9];
void tipar(int p)
{int j;
for(j=1;j<=p;j++)
printf("%d ",st[j]);
printf("\n");
}
int valid(int p)
{int i;
for(i=1;i<p;i++)
if(st[p]==st[i])
return 0;
return 1;
}
void back(int p)
{int pval;
for(pval=1;pval<=n;pval++)
{st[p]=pval;
if(valid(p))
if(p==n)
tipar(p);
else
back(p+1);
}
}
int main()
{freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d",&n);
back(1);
return 0;
}