Compilare: user.cpp: In function ‘int main()’: user.cpp:35:35: warning: suggest parentheses around arithmetic in operand of ‘|’ [-Wparentheses] New = (Last << 1) & ((1 << k) - 1) | 1; ^ user.cpp:11:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("margele.in", "r", stdin); ^ user.cpp:12:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("margele.out", "w", stdout); ^ user.cpp:13:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &n, &k, &l, &r); ^