prepare (1/3): 
finished

make (2/3): 
g++ -g -Wall -O2 -o main.o -c main.cpp
main.cpp: In function 'int main()':
main.cpp:125:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d", &type, &n, &ord);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
main.cpp:130:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &(a[i]));
         ~~~~~^~~~~~~~~~~~~~~
main.cpp:141:50: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout << "The order-" << ord <<" item is " << ans << endl;
                                                  ^~~
g++ -g -Wall -O2 -o main main.o
finished

clean (3/3): 
finished

all task finished, build successfully