Compilare: user.c: In function ‘main’: user.c:17:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] pozmin[fpoz[nr[i]]++][nr[i]]=i; ^ user.c:17:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:18:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] pozmin[fpoz[nr[i]]][nr[i]]=N; ^ user.c:18:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:11:11: warning: unused variable ‘first’ [-Wunused-variable] int i,first=0; ^ user.c:10:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d ",&n,&x); ^ user.c:12:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",nr); ^