boxes.cpp: In function 'll delivery(ll, ll, ll, ll*)':
boxes.cpp:20:20: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
20 | for (i = K - 1; i < urd.size(); i += K) {
| ~~^~~~~~~~~~~~
boxes.cpp:25:20: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
25 | for (i = K - 1; i < ard.size(); i += K) {
| ~~^~~~~~~~~~~~
boxes.cpp:9:23: warning: unused variable 's' [-Wunused-variable]
9 | ll cnt = 0, i, j, r, s;
| ^
/usr/bin/ld: /tmp/ccBFY0rA.o: in function `main':
grader.c:(.text.startup+0x1ef): undefined reference to `delivery(int, int, int, int*)'
collect2: error: ld returned 1 exit status