Compilare: main.cpp: In function 'void tarjan(int)': main.cpp:21:22: 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:73:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); j++) ~~^~~~~~~~~~~~~ main.cpp:88:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < rg[i].size(); j++) ~~^~~~~~~~~~~~~~ main.cpp:98:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < g[i].size(); j++) ~~^~~~~~~~~~~~~ main.cpp:114:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~