Eroare de compilare: user.cpp: In function ‘int64_t dectoint(std::string, int64_t)’: user.cpp:13:15: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if (2 << n-i-2) ^ user.cpp:14:36: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] sum += (str[i] - 48) * (2 << n-i-2); ^ user.cpp: In function ‘std::string beauti(int64_t, int64_t)’: user.cpp:22:30: error: ‘itoa’ was not declared in this scope string lol = itoa(i, buff, 2); ^ user.cpp: In function ‘int main()’: user.cpp:53:14: warning: unused variable ‘temp’ [-Wunused-variable] ll T, n, i, temp; ^