/in/foo.cc: In member function 'void Segment::Change(int, int, int, int, int, int)':
/in/foo.cc:43:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int mid = l + r >> 1;
              ~~^~~
/in/foo.cc: In member function 'Matrix Segment::Query(int, int, int, int)':
/in/foo.cc:54:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int mid = l + r >> 1;
              ~~^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:95:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'LL {aka long long int}' [-Wformat=]
     printf("%I64d\n", s.b);
                       ~~~^