Compilare: user.cpp: In function ‘int main()’: user.cpp:45:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(n==1 || !(n%2) && n!=2){ ^ user.cpp:36:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dk.in", "r", stdin); ^ user.cpp:37:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dk.out", "w", stdout); ^