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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main (){
  5.     int n, x;
  6.     cin >> n >> x;
  7.     vector<int> arr(n);
  8.  
  9.     for (int i = 0; i < n; i++){
  10.         cin >> arr[i];
  11.     }
  12.     sort (arr.begin(), arr.end());
  13.     int l = 0, r = n - 1;
  14.     int ans = 0;
  15.     while (l <= r){
  16.     	if (l == r){
  17.     		ans++;
  18.     		break;
  19.     	} else if (arr[l] + arr[r] <= x){
  20.     		l++;
  21.     		r--;
  22.     		ans++;
  23.     	} else {
  24.     		r--;
  25.     		ans++;
  26.     	}
  27.     }
  28.  
  29.     cout << ans << '\n';
  30. }
Success #stdin #stdout 0s 5312KB
comments (?)
stdin
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4 10 
7 2 3 9
stdout
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3
https://ideone.com/XmQVgg
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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