Compilare: main.cpp: In function 'void prt_deques()': main.cpp:29:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<values.size(); i++) ~^~~~~~~~~~~~~~ main.cpp:35:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sums.size(); i++) ~^~~~~~~~~~~~