Compilare: user.cpp: In function ‘std::vector<long long int> kadane(std::vector<long long int>, int)’: user.cpp:16:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^ user.cpp: In function ‘long long int sum(std::vector<long long int>&, int)’: user.cpp:50:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = i; j < i + k; ++j) { ^ user.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j > v.size() - 1) { ^ user.cpp: In function ‘int main()’: user.cpp:89:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto i = 0; i <= vn.size(); ++i) { ^ user.cpp:92:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto i = 0; i <= vm.size(); ++i) { ^ user.cpp:74:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &N, &M); ^ user.cpp:79:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld", &eln); ^ user.cpp:84:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld", &elm); ^