Compilare: main.cpp: In function 'void citeste()': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=2*n;i++) ~^~~~~ main.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=2*n;i++) f>>b[i]; ~^~~~~ main.cpp: In function 'int main()': main.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<=2*n;i++) ~^~~~~ main.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int dif=0;dif<=2*n;dif++) ~~~^~~~~