railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:17:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
#define fo(i,x,y) for(ll i=x;i<=y;i++)
railroad.cpp:27:8:
fo(i,0,t.size()-1)
~~~~~~~~~~~~~~
railroad.cpp:27:5: note: in expansion of macro 'fo'
fo(i,0,t.size()-1)
^~
railroad.cpp:17:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
#define fo(i,x,y) for(ll i=x;i<=y;i++)
railroad.cpp:30:8:
fo(i,0,s.size()-1)
~~~~~~~~~~~~~~
railroad.cpp:30:5: note: in expansion of macro 'fo'
fo(i,0,s.size()-1)
^~
railroad.cpp:26:9: warning: unused variable 'n' [-Wunused-variable]
int n = (int) s.size();
^