/in/foo.cc: In function 'void build(long long int, long long int, long long int)':
/in/foo.cc:29:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   29 |         int mid=l+r>>1;
      |                 ~^~
/in/foo.cc: In function 'void modify(long long int, long long int, long long int, long long int)':
/in/foo.cc:40:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   40 |         int mid=tr[u].l+tr[u].r>>1;
      |                 ~~~~~~~^~~~~~~~
/in/foo.cc: In function 'long long int query(long long int, long long int, long long int)':
/in/foo.cc:51:30: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   51 |         int res=0,mid=tr[u].l+tr[u].r>>1;
      |                       ~~~~~~~^~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:77:6: error: 'x' was not declared in this scope
   77 | cin>>x>>y>>k;modify(x,y,-k);
      |      ^
/in/foo.cc:77:9: error: 'y' was not declared in this scope
   77 | cin>>x>>y>>k;modify(x,y,-k);
      |         ^
/in/foo.cc:77:12: error: 'k' was not declared in this scope
   77 | cin>>x>>y>>k;modify(x,y,-k);
      |            ^