Compilare: user.cpp: In function ‘int verif()’: user.cpp:25:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[sol[i]].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:59:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&n,&k,&m); ^ user.cpp:63:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d ",&nr); ^ user.cpp:67:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d ",&x); ^