Compilare: user.cpp: In function ‘int main()’: user.cpp:49:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vecin[nod].size(); i++) ^ user.cpp:31:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &m); ^ user.cpp:36:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &u, &v, &c); ^