View Compilation Error

0_0_14267414_25095.cpp: In constructor 'Tree::Tree(int, int)':
0_0_14267414_25095.cpp:66:20: error: expected ';' before 'Tree'
   lson = (pool++)  Tree(l, m);
                    ^
0_0_14267414_25095.cpp:67:20: error: expected ';' before 'Tree'
   rson = (pool++)  Tree(m + 1, r);
                    ^
0_0_14267414_25095.cpp: In function 'int main()':
0_0_14267414_25095.cpp:125:25: error: expected ',' or ';' before 'Tree'
   Tree *tree = (pool++) Tree(0, n - 1);
                         ^