prepare (1/3): 
finished

make (2/3): 
g++ -g -Wall -O2 -o main.o -c main.cpp 
main.cpp: In function 'int main(int, char**)':
main.cpp:385:21: warning: unused variable 'alltradecount' [-Wunused-variable]
                 int alltradecount[countmediannames];
                     ^~~~~~~~~~~~~
main.cpp:540:17: warning: unused variable 'alltradecount' [-Wunused-variable]
             int alltradecount[countmediannames];
                 ^~~~~~~~~~~~~
main.cpp:645:81: warning: for increment expression has no effect [-Wunused-value]
             for (iter = availablebuyers.begin(); iter != availablebuyers.end(); iter) {
                                                                                 ^~~~
main.cpp:657:83: warning: for increment expression has no effect [-Wunused-value]
             for (iter = availablesellers.begin(); iter != availablesellers.end(); iter) {
                                                                                   ^~~~
main.cpp:1286:17: warning: unused variable 'timestamp1' [-Wunused-variable]
             int timestamp1 = -1;
                 ^~~~~~~~~~
main.cpp:1287:17: warning: unused variable 'timestamp2' [-Wunused-variable]
             int timestamp2 = -1;
                 ^~~~~~~~~~
main.cpp:101:9: warning: unused variable 'opterr' [-Wunused-variable]
     int opterr = 0;
         ^~~~~~
main.cpp:102:9: warning: unused variable 'digit_optind' [-Wunused-variable]
     int digit_optind = 0;
         ^~~~~~~~~~~~
main.cpp:169:10: warning: unused variable 'changetime' [-Wunused-variable]
     bool changetime = 0;
          ^~~~~~~~~~
main.cpp:194:9: warning: unused variable 'a' [-Wunused-variable]
     int a;
         ^
main.cpp:195:9: warning: unused variable 'b' [-Wunused-variable]
     int b;
         ^
g++ -g -Wall -O2 -o main main.o
finished

clean (3/3): 
finished

all task finished, build successfully