Compilare: user.c: In function ‘main’: user.c:94:10: warning: unused variable ‘a’ [-Wunused-variable] char a[300000]; ^ user.c:97:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d %d", &n, &A, &B); ^ user.c:100:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^ user.c: In function ‘cb1’: user.c:72:5: warning: ‘fin’ may be used uninitialized in this function [-Wmaybe-uninitialized] return fin; ^ user.c: In function ‘cb2’: user.c:89:5: warning: ‘fin’ may be used uninitialized in this function [-Wmaybe-uninitialized] return fin; ^ user.c: In function ‘main’: user.c:106:38: warning: ‘fin’ may be used uninitialized in this function [-Wmaybe-uninitialized] c += cb1(v,B-v[i],i+1,n - 1) - cb2(v,A-v[i],i+1,n - 1) + 1; ^ user.c:106:38: warning: ‘fin’ may be used uninitialized in this function [-Wmaybe-uninitialized]