View Compilation Error

0_0_21268931_3792.cpp: In function 'void pushdown(int)':
0_0_21268931_3792.cpp:26:52: error: expected '}' at end of input
         swap(tree[rt<<1].ans[0],tree[rt<<1].ans[1]);
                                                    ^
0_0_21268931_3792.cpp:26:52: error: expected '}' at end of input