foo.cc: In function 'int main()':
foo.cc:78:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   78 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
foo.cc:82:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   82 |         scanf("%d",&a[i].opt);
      |         ~~~~~^~~~~~~~~~~~~~~~
foo.cc:83:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   83 |         if(a[i].opt==1||a[i].opt==5)scanf("%d",&a[i].num),s[++cnt]=a[i].num;
      |                                     ~~~~~^~~~~~~~~~~~~~~~
foo.cc:84:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   84 |         if(a[i].opt<=4)scanf("%d",&a[i].val),a[i].val=(a[i].val%mod+mod)%mod,a[i].inv=quick(a[i].val,mod-2);
      |                        ~~~~~^~~~~~~~~~~~~~~~
foo.cc:95:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   95 |     scanf("%d",&t);
      |     ~~~~~^~~~~~~~~
foo.cc:99:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   99 |         scanf("%d%d",&ai,&bi);
      |         ~~~~~^~~~~~~~~~~~~~~~

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