View Compilation Error

0_0_26085737_25078.cpp: In function 'int merge(int, int, int&)':
0_0_26085737_25078.cpp:38:50: error: invalid types 'int[int]' for array subscript
     if(rs[rt]|rs[prt]) rs[rt]=merge(rs[rt],rt[prt],ans);
                                                  ^
0_0_26085737_25078.cpp: In function 'void dfs(int)':
0_0_26085737_25078.cpp:43:9: error: 'i' was not declared in this scope
     ans[i]=-1;
         ^