Compilare: main.cpp: In function 'void dfsDown(int, std::vector<std::pair<int, int> >*, int*, bool*)': main.cpp:9:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfsUp(int, std::vector<std::pair<int, int> >*, int*, int*, bool*)': main.cpp:23:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:30:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:45:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:47:13: warning: unused variable 'cost' [-Wunused-variable] int cost = edge[node][i].second; ^~~~