fork download
copy 
  1. #include<iostream>
  2. #include<algorithm>
  3. using namespace std;
  4. const int SIZE = 200000;
  5. int a[SIZE];
  6. int main() {
  7.     int N;
  8.     cin >> N;
  9.     for(int i = 0; i < N; i++) cin >> a[i];
  10.     for(int i = 0; (1 << i) < N; i++) {
  11.         int len = 1 << i;
  12.         for(int j = 0; j + len < N; j += len * 2) {
  13.         	cout << j << " " << j + len << endl; 
  14.             inplace_merge(a + j, a + j + len, a + min(N, j + len * 2));
  15.         }
  16.     }
  17.     for(int i = 0; i < N; i++) cout << a[i] << (i + 1 < N ? ' ' : '\n');
  18. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
copy 
3
1 4 2
stdout
copy 
0 1
0 2
1 2 4
https://ideone.com/fy4nmR
language:
C++14 (gcc 8.3)
created:
11 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!