Compilare: user.c: In function ‘main’: user.c:70:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d ", &n); ^ user.c: In function ‘solve’: user.c:63:3: warning: ‘rez’ may be used uninitialized in this function [-Wmaybe-uninitialized] return rez; ^ user.c: In function ‘main’: user.c:74:12: warning: ‘rez’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out, "%d\n", solve()); ^