Compilare: main.cpp: In function 'int main()': main.cpp:20:20: warning: comparison of integer expressions of different signedness: 'std::set<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 20 | while(st.size()<k) | ~~~~~~~~~^~ main.cpp:13:13: warning: unused variable 'j' [-Wunused-variable] 13 | int n,i,j,k,l,x,curr,val; | ^ main.cpp:13:17: warning: unused variable 'l' [-Wunused-variable] 13 | int n,i,j,k,l,x,curr,val; | ^