boxes.cpp: In function 'long long int delivery(int, int, int, std::vector<int>)':
boxes.cpp:6:24: warning: unused parameter 'n' [-Wunused-parameter]
6 | long long delivery(int n, int k, int l, vector<int> positions){
| ~~~~^
boxes.cpp:6:31: warning: unused parameter 'k' [-Wunused-parameter]
6 | long long delivery(int n, int k, int l, vector<int> positions){
| ~~~~^
/usr/bin/ld: /tmp/ccoioQjJ.o: in function `main':
grader.c:(.text.startup+0x1ef): undefined reference to `delivery(int, int, int, int*)'
collect2: error: ld returned 1 exit status