Compilare: user.cpp: In function ‘int main()’: user.cpp:55:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if( ( dep[lg[x]]&(i-x) ) == dep[lg[x]] ) ^ user.cpp:55:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] if( ( dep[lg[x]]&(i-x) ) == dep[lg[x]] ) ^ user.cpp:23:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&k,&R); ^ user.cpp:29:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&a,&b); ^