wiring.cpp: In function 'long long int min_total_length(std::vector<int>, std::vector<int>)':
wiring.cpp:9:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < b.size(); ++i)
~~^~~~~~~~~~
wiring.cpp:15:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < r.size(); ++i)
~~^~~~~~~~~~
wiring.cpp:17:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = r.size(); i < b.size(); ++i)
~~^~~~~~~~~~