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Cod sursa(job #399261)
#include <iostream.h>
#include <fstream.h>
ifstream f("submultimi.in");
ofstream g("submultimi.out");
int x[18],n,k;
void tipar(int k){
int i;
for(i=1;i<=k;i++)
g<<x[i]<<" ";
g<<"\n";
}
void back(){
k=1;
x[k]=0;
while(k>0)
if(x[k]<n){
x[k]++;
if(k<=n)
tipar(k);
k++;
x[k]=x[k-1];
}
else k--;
}
int main(){
f>>n;
back();
return 0;
}