Compilare: main.cpp: In function 'int main()': main.cpp:44:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();++j) ~^~~~~~~~~~~~ main.cpp:14:15: warning: unused variable 'x' [-Wunused-variable] int i,n,j,x,y,cnt=0,k,t,e; ^ main.cpp:14:17: warning: unused variable 'y' [-Wunused-variable] int i,n,j,x,y,cnt=0,k,t,e; ^ main.cpp:14:25: warning: unused variable 'k' [-Wunused-variable] int i,n,j,x,y,cnt=0,k,t,e; ^ main.cpp:58:27: warning: 'pz' may be used uninitialized in this function [-Wmaybe-uninitialized] mx[v[i][pz]]=max(mx[v[i][pz]],idk); ^