Compilare: user.cpp: In function ‘int main()’: user.cpp:44:17: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(k > 0 & ch > a[k] & n - i + k >= m) ^ user.cpp:44:45: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(k > 0 & ch > a[k] & n - i + k >= m) ^ user.cpp:34:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trompeta.in", "r", stdin); ^