View Compilation Error

0_0_27111777_16770.cpp: In function 'int main()':
0_0_27111777_16770.cpp:20:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_27111777_16770.cpp:2:5: note: 'int main()' previously defined here
 int main()
     ^