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Cod sursa(job #672961)
#include <cstdio>
bool bit(int n, int j){
if(n & (1 << j)) return 1;
return 0;
}
int main(){
freopen("submultimi.in", "r", stdin);
freopen("submultimi.out", "w", stdout);
int n;
scanf("%d", &n);
for(int i = 1; i < (1 << n); ++ i){
for(int j = 0; (1 << j) < i; ++ j){
if(bit(i, j)) printf("%d ", j + 1);
}
printf("\n");
}
return 0;
}