Compilare: user.cpp: In function ‘int solutie(int)’: user.cpp:11:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] else if(k==3) ^ user.cpp:6:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(2*k==niv) ^ user.cpp: In function ‘void back(int)’: user.cpp:46:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(niv<=k*2) ^ user.cpp: In function ‘int main()’: user.cpp:53:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.in","r",stdin); ^ user.cpp:54:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.out","w",stdout); ^ user.cpp:55:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^