foo.cc: In function 'int main()':
foo.cc:37:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |     scanf("%d%d%d",&n,&m,&q);//输入字符串s的长度,字符串t的长度,询问次数
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |     scanf("%s",s+1);
      |     ~~~~~^~~~~~~~~~
foo.cc:39:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |     scanf("%s",t+1);
      |     ~~~~~^~~~~~~~~~
foo.cc:44:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |         scanf("%d%d",&l,&r);
      |         ~~~~~^~~~~~~~~~~~~~

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