Compilare: user.cpp: In function ‘void EulerCy(int)’: user.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; Vidx[nod] < V[nod].size(); ) ^ user.cpp: In function ‘int main()’: user.cpp:64:66: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘std::vector<int>::size_type {aka long unsigned int}’ [-Wformat=] printf("%d\n", 2 * ((sol.size() - 1) / 2 + !(sol.size() & 1))); ^ user.cpp:65:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < sol.size() - 1; i += 2) ^ user.cpp:54:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:58:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^