foo.c: In function 'Unique':
foo.c:25:9: warning: unused variable 'sum' [-Wunused-variable]
int sum=0;
^~~
foo.c: In function 'main':
foo.c:7:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n1,&n2);
^~~~~~~~~~~~~~~~~~~~~
foo.c:11:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&a1[i]);
^~~~~~~~~~~~~~~~~~
foo.c:15:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&a2[i]);
^~~~~~~~~~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务