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- #include <cstdio>
- #include <set>
- #include <vector>
- #include <algorithm>
- using namespace std;
- multiset <int> s;
- int temp,ak;
- int listsize, sizetemp, posz;
- int main()
- {
- scanf("%d", &listsize);
- for ( int i = 1; i <= listsize; ++i)
- {
- scanf("%d", &sizetemp);
- for (int j = 1; j <=sizetemp; ++j)
- {
- scanf("%d", &posz);
- s.insert( posz );
- }
- }
- ak = 0;
- while ( !s.empty() )
- {
- temp=*s.lower_bound( ak );
- s.erase (s.lower_bound (ak ) );
- ak = temp;
- printf("%d ", ak);
- }
- }
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