运行 ID: 32719

Main.cc:12:28: error: declaration of ‘c’ as array of references
 long long dfs(long long &c[]){
                            ^
Main.cc: In function ‘long long int dfs(...)’:
Main.cc:25:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
Main.cc: In function ‘int main()’:
Main.cc:27:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ~~~~~^~~~~~~~~~~
Main.cc:29:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&a[i]);
         ~~~~~^~~~~~~~~~~~~~
Main.cc:32:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&c[i]);
         ~~~~~^~~~~~~~~~~~~~