Compilare: user.cpp:8:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define NMAX 1<<20 + 1 ^ user.cpp:10:16: note: in expansion of macro ‘NMAX’ int n, l, u, v[NMAX]; ^ user.cpp: In function ‘long long int check(int)’: user.cpp:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (h.size() > lim) ^ user.cpp: In function ‘int main()’: user.cpp:35:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^