Compilare: user.cpp: In function ‘int main()’: user.cpp:39:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:22:20: warning: unused variable ‘stiva’ [-Wunused-variable] int start=0,stop=0,stiva=0; ^ user.cpp: In function ‘long unsigned int parantezari(long unsigned int, long unsigned int)’: user.cpp:55:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pp[a]==b && b==a+1) return 1; ^ user.cpp:60:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pp[a]==b)return 1+parantezari(a+1,b-1); ^ user.cpp:63:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=a; i<=b; i++){ ^