wiring.cpp: In function 'long long int min_total_length(std::vector<int>, std::vector<int>)':
wiring.cpp:9:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
9 | for (long long i=0; i<=r.size()-2; i++)
| ~^~~~~~~~~~~~
wiring.cpp:11:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
11 | for (long long i=1; i<b.size(); i++)
| ~^~~~~~~~~
wiring.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type]
17 | }
| ^