View Compilation Error

0_0_29922221_4004.cpp:3:17: error: 'fastIO' is not a namespace-name
 using namespace fastIO;
                 ^
0_0_29922221_4004.cpp:3:23: error: expected namespace-name before ';' token
 using namespace fastIO;
                       ^
0_0_29922221_4004.cpp: In function 'int main()':
0_0_29922221_4004.cpp:109:13: error: 'read' was not declared in this scope
    read(a[i]);
             ^
0_0_29922221_4004.cpp:109:13: note: suggested alternative:
0_0_29922221_4004.cpp:23:14: note:   'fastIO::read'
  inline void read(long long int &x) {
              ^
0_0_29922221_4004.cpp:120:12: error: 'read' was not declared in this scope
    read(tem);
            ^
0_0_29922221_4004.cpp:120:12: note: suggested alternative:
0_0_29922221_4004.cpp:23:14: note:   'fastIO::read'
  inline void read(long long int &x) {
              ^