Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  long long int n,k,place=0;
  long long int ans=1000000000;
  long long int dis,disad;
  bool b=false;
  cin>>n>>k;
  long long int c[n];
  for(int i=0;i<n;i++){
    cin>>c[i];
    if(c[i]<0) place=i;
  }
  for(int i=0;i<n-k;i++){
    if((i+k-1)<place) continue;
    if((place+1)<i) continue;
    dis=c[i+k-1]-c[i];
    disad=c[i];
    disad=abs(disad);
    disad=min(disad,c[i+k-1]);
    dis+=disad;
    ans=min(ans,dis);
  }
  if(k==1){
    for(int i=0;i<n;i++){
      dis=abs(c[i]);
      ans=min(ans,dis);
    }
  }
  if(c[n-1]<0){
    ans=abs([n-k]);
  }
  cout<<ans<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:15: error: expected ',' before '-' token
   31 |     ans=abs([n-k]);
      |               ^
      |               ,
a.cc:31:15: error: expected identifier before '-' token
a.cc: In lambda function:
a.cc:31:18: error: expected '{' before ')' token
   31 |     ans=abs([n-k]);
      |                  ^
a.cc: In function 'int main()':
a.cc:31:12: error: no matching function for call to 'abs(main()::<lambda()>)'
   31 |     ans=abs([n-k]);
      |         ~~~^~~~~~~
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166,
                 from a.cc:1:
/usr/include/c++/14/bits/valarray_after.h:445:5: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_UnClos<std::_Abs, std::_ValArray, _Tp>, _Tp> std::abs(const valarray<_Tp>&)'
  445 |     _DEFINE_EXPR_UNARY_FUNCTION(abs, struct std::_Abs)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:445:5: note:   template argument deduction/substitution failed:
a.cc:31:12: note:   'main()::<lambda()>' is not derived from 'const std::valarray<_Tp>'
   31 |     ans=abs([n-k]);
      |         ~~~^~~~~~~
/usr/include/c++/14/bits/valarray_after.h:445:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_UnClos<std::_Abs, std::_Expr, _Dom>, typename _Dom::value_type> std::abs(const _Expr<_Dom1, typename _Dom1::value_type>&)'
  445 |     _DEFINE_EXPR_UNARY_FUNCTION(abs, struct std::_Abs)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:445:5: note:   template argument deduction/substitution failed:
a.cc:31:12: note:   'main()::<lambda()>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   31 |     ans=abs([n-k]);
      |         ~~~^~~~~~~
In file included from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/complex:892:5: note: candidate: 'template<class _Tp> _Tp std::abs(const complex<_Tp>&)'
  892 |     abs(const complex<_Tp>& __z) { return __complex_abs(__z.__rep()); }
      |     ^~~
/usr/include/c++/14/complex:892:5: note:   template argument deduction/substitution failed:
a.cc:31:12: note:   'main()::<lambda()>' is not derived from 'const std::complex<_Tp>'
   31 |     ans=abs([n-k]);
      |         ~~~^~~~~~~
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:42:
/usr/include/stdlib.h:980:12: note: candidate: 'int abs(int)'
  980 | extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
      |            ^~~
/usr/include/stdlib.h:980:21: note:   no known conversion for argument 1 from 'main()::<lambda()>' to 'int'
  980 | extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
      |                 ~~~~^~~
In file included from /usr/include/c++/14/cstdlib:81:
/usr/include/c++/14/bits/std_abs.h:137:3: note: candidate: 'constexpr __float128 std::abs(__float128)'
  137 |   abs(__float128 __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:137:18: note:   no known conversion for argument 1 from 'main()::<lambda()>' to '__float128'
  137 |   abs(__float128 __x)
      |       ~~~~~~~~~~~^~~
/usr/include/c++/14/bits/std_abs.h:85:3: note: candidate: 'constexpr __int128 std::abs(__int128)'
   85 |   abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; }
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:85:30: note:   no known conversion for argument 1 from 'main()::<lambda()>' to '__int128'
   85 |   abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; }
      |                              ^
/usr/include/c++/14/bits/std_abs.h:79:3: note: candidate: 'constexpr long double std::abs(long double)'
   79 |   abs(long double __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:79:19: note:   no known conversion for argument 1 from 'main()::<lambda()>' to 'long double'
   79 |   abs(long double __x)
      |       ~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/std_abs.h:75:3: note: candidate: 'constexpr float std::abs(float)'
   75 |   abs(float __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:75:13: note:   no known conversion for argument 1 from 'main()::<lambda()>' to 'float'
   75 |   abs(float __x)
      |       ~~~~~~^~~
/usr/include/c++/14/bits/std_abs.h:71:3: note: candidate: 'constexpr double std::abs(double)'
   71 |   abs(double __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:71:14: note:   no known conversion for argument 1 from 'main()::<lambda()>' to 'double'
   71 |   abs(double __x)
      |       ~~~~~~~^~~
/usr/include/c++/14/bits/std_abs.h:61:3: note: candidate: 'long long int std::abs(long long int)'
   61 |   abs(long long __x) { return __builtin_llabs (__x); }
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:61:17: note:   no known conversion for argument 1 from 'main()::<lambda()>' to 'long long int'
   61 |   abs(long long __x) { return __builtin_llabs (__x); }
      |       ~~~~~~~~~~^~~
/usr/include/c++/14/bits/std_abs.h:56:3: note: candidate: 'long int std::abs(long int)'
   56 |   abs(long __i) { return __builtin_labs(__i); }
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:56:12: note:   no known conversion for argument 1 from 'main()::<lambda()>' to 'long int'
   56 |   abs(long __i) { return __builtin_labs(__i); }
      |       ~~~~~^~~