Compilare: user.c: In function ‘solve’: user.c:31:13: warning: ‘return’ with a value, in function returning void [enabled by default] return 0; ^ user.c: In function ‘main’: user.c:44:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&l); ^ user.c:47:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&v1[i],&v2[i]); ^