Compilare: main.cpp: In function 'int main()': main.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < E.size(); i++ ){ ~~^~~~~~~~~~ main.cpp:24:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = i + 1; j < E.size(); j++ ){ ~~^~~~~~~~~~ main.cpp:39:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < E.size(); i++ ){ ~~^~~~~~~~~~ main.cpp:83:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( i != Order.size() - 1 ) ~~^~~~~~~~~~~~~~~~~~~