Compilare: user.cpp: In function ‘long long unsigned int caut(int)’: user.cpp:17:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n&&a[i]<=nr; i++) ^ user.cpp:17:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n&&a[i]<=nr; i++) ^ user.cpp:27:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[middle]==m) ^ user.cpp:32:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(a[middle]>m)right=middle-1; ^ user.cpp:35:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a[left]>m)left--; ^