/in/driver/main.cpp: In function 'int main()':
/in/driver/main.cpp:5:5: error: redefinition of 'int main()'
 int main () {
     ^~~~
In file included from /in/driver/main.cpp:1:0:
/in/shortestP2P.hpp:108:5: note: 'int main()' previously defined here
 int main() {
     ^~~~