foo.c: In function 'main':
foo.c:33:12: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'int' [-Wformat=]
   printf("%s",c[i]);
           ~^  ~~~~
           %d
foo.c:10:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",&m);
   ^~~~~~~~~~~~~~
foo.c:20:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",&n);
   ^~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务