View Compilation Error

0_0_2586531_8470.cpp: In function `int main()':
0_0_2586531_8470.cpp:4: error: conflicting declaration 'long int n'
0_0_2586531_8470.cpp:3: error: 'n' has a previous declaration as `int n'
0_0_2586531_8470.cpp:4: error: declaration of `long int n'
0_0_2586531_8470.cpp:3: error: conflicts with previous declaration `int n'
0_0_2586531_8470.cpp:6: error: `s' undeclared (first use this function)
0_0_2586531_8470.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)