Compilare: main.cpp: In member function 'bool classcomp::operator()(nodeCost, nodeCost) const': main.cpp:26:48: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return a.cost < b.cost || a.cost == b.cost && a.node < b.node; ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'std::vector<int> calculateCosts(std::vector<std::vector<edge> >&)': main.cpp:36:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < graph.size(); i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < aa.size(); i++) ~~^~~~~~~~~~~