Compilare: main.cpp: In function 'int main()': main.cpp:54:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nodes[node].size(); i++) { ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:61:8: warning: unused variable 'nextCost' [-Wunused-variable] int nextCost = answers[nextNode - 1].second; ^~~~~~~~