Compilare: main.cpp: In function 'void sift(long long unsigned int)': main.cpp:25:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k+1<=n) ~~~^~~ main.cpp: In function 'int main()': main.cpp:59:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(tmax!=0 && pos<=cnt) ~~~^~~~~ main.cpp:62:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(tmax==oaie[pos].distanta && pos<=cnt) ~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:62:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(tmax==oaie[pos].distanta && pos<=cnt) ~~~^~~~~ main.cpp:73:21: warning: statement is a reference, not call, to function 'percolate' [-Waddress] percolate; ^ main.cpp:73:21: warning: statement has no effect [-Wunused-value] main.cpp:57:48: warning: variable 'ok' set but not used [-Wunused-but-set-variable] unsigned long long tmax=oaie[1].distanta,pos=1,ok=0; ^~