运行 ID: 127912

Main.cc: In function ‘long long int check(double)’:
Main.cc:10:8: error: invalid types ‘int [1000007][double]’ for array subscript
  if(a[x]) return sum;
        ^
Main.cc:10:18: error: ‘sum’ was not declared in this scope
  if(a[x]) return sum;
                  ^~~
Main.cc:15:5: error: invalid types ‘int [1000007][double]’ for array subscript
  a[x]=sum;
     ^