Compilare: main.cpp: In function 'bool exista_dreptunghi(int)': main.cpp:112:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a.size(); i++) ~^~~~~~~~~ main.cpp:114:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<b.size(); j++) ~^~~~~~~~~ main.cpp:124:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a.size() && !gasit; i++) ~^~~~~~~~~ main.cpp:132:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a.size(); i++) ~^~~~~~~~~ main.cpp:136:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<b.size(); i++) ~^~~~~~~~~