boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:20:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
20 | for(int i=0; i<v1.size(); i++){
| ~^~~~~~~~~~
boxes.cpp:24:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
24 | for(int i=0; i<v2.size(); i++){
| ~^~~~~~~~~~
boxes.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
29 | for(int i=0; i<v1.size()&&i<k; i++){
| ~^~~~~~~~~~
boxes.cpp:32:14: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
32 | if(c1>=v1.size()){
| ~~^~~~~~~~~~~