Compilare: user.cpp: In function ‘int pliare(int, int, int, int)’: user.cpp:21:67: warning: suggest parentheses around ‘-’ inside ‘>>’ [-Wparentheses] return pliare(lvl + 1 , (1 << lvl) - x + 1 , (n >> lvl-1) - y + 1 , fix); ^ user.cpp: In function ‘int main()’: user.cpp:30:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("banda.in","r",stdin); ^ user.cpp:31:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("banda.out","w",stdout); ^ user.cpp:33:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &k, &t, &x); ^