/in/foo.cc:3:30: error: 'string' does not name a type
 long long a[2][128],b[128],s;string l;
                              ^~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:6:5: error: 'ios' has not been declared
     ios::sync_with_stdio(false);
     ^~~
/in/foo.cc:8:5: error: 'cin' was not declared in this scope
     cin>>p>>l;
     ^~~
/in/foo.cc:8:13: error: 'l' was not declared in this scope
     cin>>p>>l;
             ^
/in/foo.cc:11:48: error: 'memcpy' was not declared in this scope
         int x=l[i]-'0';memcpy(a[i%2],b,sizeof b);
                                                ^
/in/foo.cc:17:5: error: 'cout' was not declared in this scope
     cout<<s<<endl;
     ^~~~
/in/foo.cc:17:14: error: 'endl' was not declared in this scope
     cout<<s<<endl;
              ^~~~