wiring.cpp: In function 'long long int min_total_length(std::vector<int>, std::vector<int>)':
wiring.cpp:7:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<b.size();i++){
~^~~~~~~~~
wiring.cpp:15:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<r.size();i++){
~^~~~~~~~~
wiring.cpp:18:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=r.size();i<b.size();i++)
~^~~~~~~~~
wiring.cpp:14:11: warning: unused variable 'k' [-Wunused-variable]
int k=b.size()-r.size();
^