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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define ll                  long long
  4. const int N = 1e6+7;
  5.  
  6. int a[N];
  7. ll n, k, cnt;
  8.  
  9. int main(){
  10.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  11.     cin >> n >> k;
  12.     int l = 1, r = n;
  13.     for(int i = 1; i <= n; i++){
  14.         if(cnt + (n - i) <= k){
  15.             cnt += (n - i);
  16.             a[r--] = i;
  17.         }
  18.         else{
  19.             a[l++] = i;
  20.         }
  21.     }
  22.     for(int i = 1; i <= n; i++) cout << a[i] << ' ';
  23.     return 0;
  24. }
Success #stdin #stdout 0s 4344KB
comments (?)
stdin 
7 15
stdout 
4 5 6 7 3 2 1
https://ideone.com/kXZNIe
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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