Compilare: main.cpp: In function 'void tarjan(int)': main.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[node].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:77:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~ main.cpp:78:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < sol[i].size(); j++) ~~^~~~~~~~~~~~~~~ main.cpp:85:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); j++) ~~^~~~~~~~~~~~~ main.cpp:120:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < edges.size(); i++) ~~^~~~~~~~~~~~~~