foo.c: In function 'main':
foo.c:51:5: error: expected ';' before 'return'
     return 0;
     ^~~~~~
foo.c:7:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d",&a,&b,&c);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务