Compilare: user.cpp: In function ‘void f(std::deque<int>, int&, int&)’: user.cpp:9:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < m.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:24:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d", &n, &k); ^ user.cpp:28:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &el); ^ user.cpp:42:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &el); ^