Compilare: user.cpp: In function ‘int main()’: user.cpp:49:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < sol.size();i++) ^ user.cpp:15:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:18:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^