foo.cc: In function 'void build(int, int, int)':
foo.cc:17:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  ll mid=l+r>>1;
         ~^~
foo.cc: In function 'void update_sqrt(long long int, long long int, long long int)':
foo.cc:49:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  ll mid=tree[o].r+tree[o].l>>1;
         ~~~~~~~~~^~~~~~~~~~
foo.cc: In function 'long long int query(long long int, long long int, long long int)':
foo.cc:62:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  ll mid=tree[o].l+tree[o].r>>1;
         ~~~~~~~~~^~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:73:26: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   scanf("%d%d%d",&z,&b,&c);
                  ~~      ^
foo.cc:73:26: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'long long int*' [-Wformat=]
foo.cc:73:26: warning: format '%d' expects argument of type 'int*', but argument 4 has type 'long long int*' [-Wformat=]
foo.cc:68:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
  ~~~~~^~~~~~~~~~~
foo.cc:69:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;++i) scanf("%lld",&a[i]);
                        ~~~~~^~~~~~~~~~~~~~
foo.cc:71:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&m);
  ~~~~~^~~~~~~~~~~
foo.cc:73:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&z,&b,&c);
   ~~~~~^~~~~~~~~~~~~~~~~~~

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