Compilare: main.cpp: In function 'int f(int)': main.cpp:11:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1,j=n ; i<=n ; ++i) ~^~~ main.cpp:13:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j>=1 && a[i]+a[j]>x) ~~~~~~~~~^~ main.cpp: In function 'unsigned int func(unsigned int)': main.cpp:23:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(f(i+pas)<x){ ~~~~~~~~^~