prepare (1/3): 
finished

make (2/3): 
g++ -g -Wall -std=c++11 -o2 -o main.o -c main.cpp 
In file included from main.cpp:7:0:
market.h: In member function 'void Market::printtimetravel()':
market.h:403:6: warning: variable 'profit' set but not used [-Wunused-but-set-variable]
  int profit = 0;
      ^~~~~~
g++ -g -Wall -std=c++11 -o2 -o main main.o
finished

clean (3/3): 
finished

all task finished, build successfully