View Compilation Error

0_0_16239537_1979.cpp: In function 'int main()':
0_0_16239537_1979.cpp:9:5: error: incomplete type 'std::ios_base' used in nested name specifier
     ios_base::sync_with_stdio(0);
     ^
0_0_16239537_1979.cpp:15:36: error: 'memset' was not declared in this scope
         memset(dp, false, sizeof dp);
                                    ^