Compilare: main.cpp: In function 'int main()': main.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) f>>V[i]; ~^~~ main.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n/2;i++) ~^~~~~ main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=start;i<=n;i++) ~^~~