foo.cc: In function 'int left_find(Iv&, int)':
foo.cc:99:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   99 |         int mid = l+r>>1;
      |                   ~^~
foo.cc:104:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |     if(l>=array.size()||array[l]!=num)
      |        ~^~~~~~~~~~~~~~
foo.cc: In function 'int right_find(Iv&, int)':
foo.cc:115:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  115 |         int mid=l+r>>1;
      |                 ~^~
foo.cc: In function 'void solve()':
foo.cc:131:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  131 |         scanf("%d%d%d",&n,&k,&q);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:133:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  133 |                 scanf("%d",data+i);
      |                 ~~~~~^~~~~~~~~~~~~
foo.cc:141:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  141 |                 scanf("%d%d",&L,&R);
      |                 ~~~~~^~~~~~~~~~~~~~

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