Compilare: user.cpp: In function ‘int main()’: user.cpp:30:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x!=prevdad) ^ user.cpp:55:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x!=prevdad) ^ user.cpp:80:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x!=prevdad) ^ user.cpp:105:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x!=prevdad) ^ user.cpp:16:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bile.in","r",stdin); ^ user.cpp:17:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bile.out","w",stdout); ^ user.cpp:19:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:21:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&xx[i],&y[i]); ^