View Compilation Error

1023671_0_0_29399.cpp: In function `int main()':
1023671_0_0_29399.cpp:7: error: conflicting declaration 'int num'
1023671_0_0_29399.cpp:6: error: 'num' has a previous declaration as `long long int num'
1023671_0_0_29399.cpp:7: error: declaration of `int num'
1023671_0_0_29399.cpp:6: error: conflicts with previous declaration `long long int num'