foo.cc: In function 'int main()':
foo.cc:31:8: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |  cin>>s+1>>t+1;
      |       ~^~
foo.cc:31:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |  cin>>s+1>>t+1;
      |            ~^~
foo.cc:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |  scanf("%d%d%d",&n,&m,&q);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:35:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |   scanf("%d%d",&l,&r);
      |   ~~~~~^~~~~~~~~~~~~~

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