Compilare: main.cpp: In function 'void tarjan(int)': main.cpp:29:22: 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:82:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ctc.size(); i++) ~~^~~~~~~~~~~~ main.cpp:83:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < ctc[i].size(); j++) ~~^~~~~~~~~~~~~~~ main.cpp:86:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ctc.size(); i++) ~~^~~~~~~~~~~~ main.cpp:87:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < ctc[i].size(); j++) ~~^~~~~~~~~~~~~~~ main.cpp:89:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it = 0; it < v[ctc[i][j]].size(); it++) ~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:101:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= ctc.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:102:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j <= ctc.size(); j++) ~~^~~~~~~~~~~~~ main.cpp:122:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= ctc.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:132:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); i++) ~~^~~~~~~~~~~~