Compilare: user.cpp: In function ‘int st(int)’: user.cpp:30:20: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] return (1 << h - 1) + min(1 << h - 1, 1 + n - (1 << h)) - 1; } ^ user.cpp:30:38: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] return (1 << h - 1) + min(1 << h - 1, 1 + n - (1 << h)) - 1; } ^ user.cpp: In function ‘int main()’: user.cpp:42:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("permheap.in", "r", stdin); ^ user.cpp:43:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("permheap.out", "w", stdout); ^ user.cpp:49:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^