Compilare: main.cpp: In function 'int main()': main.cpp:42:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int l=0;l<v[next].size()&&ok==0;l++) { ~^~~~~~~~~~~~~~~ main.cpp:14:25: warning: unused variable 'varf' [-Wunused-variable] int i,n,m,x,y,k=0,ok=0,varf,r=0,next,j,a=0; ^~~~ main.cpp:14:30: warning: unused variable 'r' [-Wunused-variable] int i,n,m,x,y,k=0,ok=0,varf,r=0,next,j,a=0; ^ main.cpp:14:39: warning: unused variable 'j' [-Wunused-variable] int i,n,m,x,y,k=0,ok=0,varf,r=0,next,j,a=0; ^