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Cod sursa(job #885056)
#include<iostream>
#include<cstdio>
using namespace std;
int st[20],n;
bool u[20];
void tipar(int n)
{
int i;
for(i=1;i<=n;i++)
printf("%d ",st[i]);
printf("\n");
}
void subm(int k)
{
int i;
if(k>=2)
tipar(k-1);
if(k==n+1)
{
return ;
}
else
for(i=st[k-1]+1;i<=n;i++)
{
if(!u[i])
{
st[k]=i;
u[i]=1;
subm(k+1);
u[i]=0;
}
}
}
int main()
{
freopen("submultimi.in","r",stdin);
freopen("submultimi.out","w",stdout);
cin>>n;
subm(1);
}