Compilare: user.cpp: In function ‘void Euler(int)’: user.cpp:22:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (u = 0; u < graf[v].size(); u++) { ~~^~~~~~~~~~~~~~~~ user.cpp:27:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (l = 0; l < graf[newV].size(); l++) { ~~^~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (muchii.size() - 1 != m) { ~~~~~~~~~~~~~~~~~~^~~~ user.cpp:61:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < muchii.size() - 1; i++) fout << muchii[i] << ' '; ~~^~~~~~~~~~~~~~~~~~~ user.cpp:42:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^