foo.cc: In function 'int main()':
foo.cc:6:17: error: conflicting declaration 'int a'
    6 |  int a[N+1],j=N,a=1,b=0;
      |                 ^
foo.cc:6:6: note: previous declaration as 'int a [(N + 1)]'
    6 |  int a[N+1],j=N,a=1,b=0;
      |      ^
foo.cc:7:20: error: 'k' was not declared in this scope
    7 |  scanf("%d %d",&N,&k);
      |                    ^
foo.cc:13:11: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   13 |   while(a<K)
      |           ^
foo.cc:16:5: error: lvalue required as increment operand
   16 |    a++;
      |     ^~
foo.cc:21:5: error: incompatible types in assignment of 'int' to 'int [(N + 1)]'
   21 |   a=1;
      |     ^

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