Compilare: main.cpp: In function 'int main()': main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ~^~~~~~~~~~~~ main.cpp:51:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[info[y]].size();i++) ~^~~~~~~~~~~~~~~~~~ main.cpp:9:20: warning: unused variable 'x1' [-Wunused-variable] long int x,m,n,x1,y1,e,b,c,y,i,k=0,j; ^~ main.cpp:9:23: warning: unused variable 'y1' [-Wunused-variable] long int x,m,n,x1,y1,e,b,c,y,i,k=0,j; ^~ main.cpp:9:40: warning: unused variable 'j' [-Wunused-variable] long int x,m,n,x1,y1,e,b,c,y,i,k=0,j; ^