View Compilation Error

0_0_37279287_31170.cpp: In function 'void sol()':
0_0_37279287_31170.cpp:91:5: error: 'memset' is not a member of 'std'
     std::memset(a,0,sizeof(a));
     ^
0_0_37279287_31170.cpp:92:5: error: 'memset' is not a member of 'std'
     std::memset(b,0,sizeof(b));
     ^
0_0_37279287_31170.cpp: In function 'int main()':
0_0_37279287_31170.cpp:116:39: error: 'clock' was not declared in this scope
     std::cerr<<endl<<"Time: "<<(clock()*1000./CLOCKS_PER_SEC)<<" ms"<<endl;
                                       ^
0_0_37279287_31170.cpp:116:47: error: 'CLOCKS_PER_SEC' was not declared in this scope
     std::cerr<<endl<<"Time: "<<(clock()*1000./CLOCKS_PER_SEC)<<" ms"<<endl;
                                               ^