Compilare: main.cpp: In function 'int main()': main.cpp:97:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;i<in.size();i++) ~^~~~~~~~~~ main.cpp:100:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;i<out.size();i++) ~^~~~~~~~~~~ main.cpp:105:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;i<out.size();i++) ~^~~~~~~~~~~ main.cpp:108:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;i<in.size();i++) ~^~~~~~~~~~