Compilare: main.cpp: In function 'void Read()': main.cpp:41:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < First[ A[i].b ].size(); ++j ) ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Euler(int)': main.cpp:65:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[w].size(); ++i ) ~~^~~~~~~~~~~~~~ main.cpp: In function 'void Do()': main.cpp:83:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( grad_in[i] > Ad[i].size() ) ~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:86:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( grad_in[i] < Ad[i].size() ) ~~~~~~~~~~~^~~~~~~~~~~~~~