Compilare: main.cpp: In function 'void citire()': main.cpp:10:11: warning: unused variable 'a' [-Wunused-variable] int i,a,b,j,m; ^ main.cpp: In function 'void rezz()': main.cpp:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[nc].size(); ++i) ~^~~~~~~~~~~~~ main.cpp:27:11: warning: unused variable 'j' [-Wunused-variable] int i,j,nc,nn,st=1,dr=0; ^ main.cpp: In function 'int main()': main.cpp:59:9: warning: unused variable 'j' [-Wunused-variable] int j,mx=0; ^