Compilare: main.cpp: In function 'std::vector<int> intersect(std::vector<int>, std::vector<int>)': main.cpp:22:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(I1 < v1.size() && I2 < v2.size()){ ~~~^~~~~~~~~~~ main.cpp:22:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(I1 < v1.size() && I2 < v2.size()){ ~~~^~~~~~~~~~~ main.cpp: In function 'std::vector<int> join(std::vector<int>, std::vector<int>)': main.cpp:37:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(I1 < v1.size() && I2 < v2.size()){ ~~~^~~~~~~~~~~ main.cpp:37:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(I1 < v1.size() && I2 < v2.size()){ ~~~^~~~~~~~~~~ main.cpp:49:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(I1 < v1.size()){ ~~~^~~~~~~~~~~ main.cpp:54:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(I2 < v2.size()){ ~~~^~~~~~~~~~~