Compilare: user.cpp: In function ‘void bford()’: user.cpp:45:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:61:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1, "%d%d", &n, &m); ^ user.cpp:64:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1, "%d%d%d", &a, &b, &c); ^