View Compilation Error

0_0_33674724_29447.cpp:2:2: error: expected unqualified-id before 'if'
  if(k<a[0].x*2+1)
  ^
0_0_33674724_29447.cpp:7:2: error: 'ans' does not name a type
  ans+=a[cou].val;
  ^
0_0_33674724_29447.cpp:8:2: error: 'k' does not name a type
  k-=a[cou++].x+1;
  ^
0_0_33674724_29447.cpp:9:2: error: expected unqualified-id before 'while'
  while(k>0&&cou<cur)
  ^
0_0_33674724_29447.cpp:17:8: error: expected constructor, destructor, or type conversion before '(' token
  printf("%d\n",ans);
        ^