foo.c: In function 'main':
foo.c:9:12: warning: unused variable 'cnt' [-Wunused-variable]
    9 |  int x,max,cnt=0;
      |            ^~~
foo.c:9:6: warning: unused variable 'x' [-Wunused-variable]
    9 |  int x,max,cnt=0;
      |      ^
foo.c:7:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    7 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
foo.c:12:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   12 |   scanf("%d", &a[i]);
      |   ^~~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务