boxes.cpp: In function 'int delivery(int, int, int, std::vector<int>)':
boxes.cpp:31:18: warning: unused parameter 'N' [-Wunused-parameter]
31 | int delivery(int N, int K, int L, vector<int> pos) {
| ~~~~^
boxes.cpp:31:25: warning: unused parameter 'K' [-Wunused-parameter]
31 | int delivery(int N, int K, int L, vector<int> pos) {
| ~~~~^
boxes.cpp:31:32: warning: unused parameter 'L' [-Wunused-parameter]
31 | int delivery(int N, int K, int L, vector<int> pos) {
| ~~~~^
boxes.cpp:31:47: warning: unused parameter 'pos' [-Wunused-parameter]
31 | int delivery(int N, int K, int L, vector<int> pos) {
| ~~~~~~~~~~~~^~~
/usr/bin/ld: /tmp/ccdGnCA6.o: in function `main':
grader.c:(.text.startup+0x1ef): undefined reference to `delivery(int, int, int, int*)'
collect2: error: ld returned 1 exit status