Compilare: user.c: In function ‘main’: user.c:49:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] ll int l = (utf8[part[X]] * curr) - volume[X]; ^ user.c:50:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] ll int r = (utf8[part[X]] * curr) + volume[X]; ^ user.c:54:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] l += NIL * utf8[part[i]] * volume[i]; ^ user.c:55:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] r += NIL * utf8[part[i]] * volume[i]; ^ user.c:31:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &N); ^ user.c:33:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %c", &volume[i], &part[i]); ^ user.c:37:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &X); ^