Compilare: main.cpp: In function 'void getedges()': main.cpp:45:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<g.size();++i){ ~^~~~~~~~~ main.cpp: In function 'void get()': main.cpp:55:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<g.size();++i){ ~^~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:70:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<g2.size();++i){ ~^~~~~~~~~~ main.cpp:81:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<g2.size();++i){ ~^~~~~~~~~~ main.cpp:82:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((g2[i].valin+g2[i].valout)==g2.size()){ ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~