Compilare: user.cpp: In function ‘int main()’: user.cpp:63:37: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] removeCharsFromString(s, " "); ^ user.cpp:86:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) { ^ user.cpp:87:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( ((v[i] | solution) & cond).count() > max_count ) { ^ user.cpp:51:10: warning: unused variable ‘c’ [-Wunused-variable] char c; ^ user.cpp:58:9: warning: unused variable ‘max_bits_set’ [-Wunused-variable] int max_bits_set = 0; ^ user.cpp:59:9: warning: unused variable ‘best_bitset_index’ [-Wunused-variable] int best_bitset_index; ^ user.cpp:93:36: warning: ‘optimal_index’ may be used uninitialized in this function [-Wmaybe-uninitialized] solution |= v[optimal_index]; ^