Compilare: user.cpp: In function ‘int get_nr_int(int)’: user.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i < ints.size(); ++i) ^ user.cpp: In function ‘int get_prev(std::vector<std::pair<long long int, long long int> >&, pll)’: user.cpp:80:20: warning: ‘ans’ may be used uninitialized in this function [-Wmaybe-uninitialized] int l, r, mid, ans; ^ user.cpp: In function ‘int get_nr_int(int)’: user.cpp:80:20: warning: ‘ans’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp: In function ‘int main()’: user.cpp:34:55: warning: ‘ans’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr_max[i] = max(nr_max[i - 1], nr_max[prev_int] + nr_int[i]); ^