Compilare: user.cpp: In function ‘void DFS_ARBORE(int, int)’: user.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nod].size(); i++) ~~^~~~~~~~~~~~~~~ user.cpp:38:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nod].size(); i++) ~~^~~~~~~~~~~~~~~ user.cpp:44:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lant[tata_nod[v[nod][i]]].size() > maxim) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ user.cpp: In function ‘void afisare()’: user.cpp:63:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < lant[i].size(); j++) ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:87:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); j++) ~~^~~~~~~~~~~~~ user.cpp:71:24: warning: unused variable ‘t’ [-Wunused-variable] int n, m, a, b, i, t, x, y; ^ user.cpp:71:27: warning: unused variable ‘x’ [-Wunused-variable] int n, m, a, b, i, t, x, y; ^ user.cpp:71:30: warning: unused variable ‘y’ [-Wunused-variable] int n, m, a, b, i, t, x, y; ^ user.cpp: In function ‘void DFS_ARBORE(int, int)’: user.cpp:55:20: warning: ‘ce’ may be used uninitialized in this function [-Wmaybe-uninitialized] tata_nod[ce] = -1; ~~~~~~~~~~~~~^~~~