ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:6:9: error: 'multiset' was not declared in this scope
6 | multiset<int> S; S.clear();
| ^~~~~~~~
ricehub.cpp:6:18: error: expected primary-expression before 'int'
6 | multiset<int> S; S.clear();
| ^~~
ricehub.cpp:6:26: error: 'S' was not declared in this scope
6 | multiset<int> S; S.clear();
| ^
ricehub.cpp:8:22: error: 'abs' was not declared in this scope; did you mean 'ans'?
8 | S.insert(abs(a[i]-a[j]));
| ^~~
| ans