Compilare: main.cpp: In function 'int main()': main.cpp:105:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 105 | for(int i=0;i<solution.size();i++) | ~^~~~~~~~~~~~~~~~ main.cpp: In member function 'void UpdHeap::fixUp(int)': main.cpp:141:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 141 | if(x<=1 || x>=v.size()) | ~^~~~~~~~~~ main.cpp: In member function 'void UpdHeap::fixDown(int)': main.cpp:154:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 154 | if(2*x>=v.size() || x==0) | ~~~^~~~~~~~~~