Compilare: user.cpp: In function ‘void euler(int)’: user.cpp:18:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[v].size();j++) ^ user.cpp:21:17: warning: unused variable ‘aux’ [-Wunused-variable] int aux=g[v][j]; ^ user.cpp: In function ‘int main()’: user.cpp:33:24: warning: unused variable ‘o’ [-Wunused-variable] int n,m,i,x,y,ok=1,o=1; ^