Eroare de compilare: main.cpp:21:5: error: 'vector' does not name a type vector<pair<long long,long long> > lines; ^~~~~~ main.cpp: In constructor 'cht_t::cht_t()': main.cpp:26:9: error: 'lines' was not declared in this scope lines.clear(); ^~~~~ main.cpp: In member function 'void cht_t::clear()': main.cpp:30:9: error: 'lines' was not declared in this scope lines.clear(); ^~~~~ main.cpp: In member function 'void cht_t::add(const std::pair<long long int, long long int>&)': main.cpp:35:32: error: 'lines' was not declared in this scope while(sz > 1 && double(lines[sz - 1].second - lines[sz - 2].second) / (lines[sz - 2].first - lines[sz - 1].first) <= double(line.second - lines[sz - 1].second) / (lines[sz - 1].first - line.first)){ ^~~~~ main.cpp:39:9: error: 'lines' was not declared in this scope lines.push_back(line); ^~~~~ main.cpp: In member function 'long long int cht_t::query(long long int)': main.cpp:48:23: error: 'lines' was not declared in this scope if(double(lines[mid + 1].second - lines[mid].second) / (lines[mid].first - lines[mid + 1].first) < x){ ^~~~~ main.cpp:55:20: error: 'lines' was not declared in this scope return max(lines[st].first * x + lines[st].second,lines[dr].first * x + lines[dr].second); ^~~~~ main.cpp: In function 'int main()': main.cpp:91:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&n,&k,&s); ^ main.cpp:94:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^ Non zero exit status: 1