Compilare: user.cpp: In function ‘sol Get_Val(unsigned int)’: user.cpp:19:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<map[r].size();i++) ^ user.cpp:22:6: warning: variable ‘nu’ set but not used [-Wunused-but-set-variable] sol nu; ^ user.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:30:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%u %u ",&n,&s); ^ user.cpp:32:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%u ",&v[i]); ^