Compilare: user.cpp: In function ‘bool insert(UL*, UI, UI, UL)’: user.cpp:51:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos >= index + k) ^ user.cpp: In function ‘int main()’: user.cpp:68:8: warning: unused variable ‘up’ [-Wunused-variable] bool up=false; ^ user.cpp:57:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(INFILE, "r", stdin); ^ user.cpp:58:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(OUTFILE, "w", stdout); ^ user.cpp:60:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:64:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u%u", &n, &k); ^ user.cpp:69:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lu", &m[0]); ^ user.cpp:72:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lu", &m[i]); ^