View Compilation Error

0_0_18739515_22881.cpp: In function 'int main()':
0_0_18739515_22881.cpp:29:53: error: expected '}' at end of input
                 ans[i]=(ans[i-1]*2+ans[i-2]*2+3)%MOD; //递归过程
                                                     ^
0_0_18739515_22881.cpp:29:53: error: expected '}' at end of input
0_0_18739515_22881.cpp:29:53: error: expected '}' at end of input