Compilare: main.cpp: In function 'int main()': main.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++)f>>v[i]; ~^~~ main.cpp:18:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++)if(v[i+c-1]!=0)w[++nr]=v[i+c-1]-v[i]; ~^~~