fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define ll long long 
  5.  
  6. #ifdef LOCAL
  7.   #include "debug.h"
  8. #else
  9.   #define out(...) 0
  10. #endif
  11.  
  12.  
  13. void solve() {
  14.   int n, k; cin >> n >> k;
  15.   vector<int> v(n);
  16.  
  17.   for(int& i : v) {
  18.     cin >> i;
  19.   }
  20.  
  21.   int ans = 1E9;
  22.  
  23.   for (int i = k - 1; i < n; ++i) {
  24.     if (v[i - k + 1] >= 0)  ans = min(ans, v[i]);              
  25.     else if (v[i] <= 0)     ans = min(ans, abs(v[i - k + 1]));
  26.     else {
  27.       ans = min(ans, abs(v[i - k + 1]) * 2 + v[i]);
  28.       ans = min(ans, abs(v[i - k + 1]) + v[i] * 2);
  29.     }
  30.   }
  31.   cout << ans << '\n';
  32. }
  33.  
  34. int main() {
  35.   ios::sync_with_stdio(0); 
  36.   cin.tie(0); 
  37.  
  38.   int tc = 1;
  39.   // cin >> tc;
  40.  
  41.   for(int cs = 1; cs <= tc; cs++) {
  42.     // cout << "Case " << cs << ": ";
  43.     solve();
  44.   }
  45.   return 0;
  46. }
  47.  
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
1000000000
https://ideone.com/RNbYmJ
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!