Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:29:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'bool verifica()': main.cpp:48:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < care.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < care.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:61:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < c.size(); i++) ~~^~~~~~~~~~ main.cpp:63:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t = 0; t < v[c[i]].size(); t++) ~~^~~~~~~~~~~~~~~~ main.cpp:72:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < care.size(); i++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:13: warning: unused variable 'cat' [-Wunused-variable] int cat = 0,cnt = 0; ^~~