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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. vector<int> rearrangeArray(vector<int>& a) {
  5.         int n = a.size();
  6.         vector<int>ans(2*n+1,1e9);
  7.         int pos=0,neg=1;
  8.         for(int i=0;i<n;i++){
  9.             if(a[i]>0){
  10.                 ans[pos] = a[i];
  11.                 a[i]=1e9;
  12.                 pos=pos+2;
  13.             }
  14.             else{
  15.                 ans[neg] = a[i];
  16.                 a[i]=-1e9;
  17.                 neg = neg+2;
  18.             }
  19.         }
  20.         for(int i=0;i<ans.size();i++)
  21.         cout<<ans[i]<<" ";
  22.  
  23.         //adjusting the remaining elements
  24.         int idx=-1;int count=0;
  25.         for(int i=0;i<ans.size();i++){
  26.         	if(ans[i]!=1e9 && idx>=0){
  27.         		swap(ans[idx],ans[i+1]);
  28.         		idx=i+1;
  29.         	}
  30.         	else{
  31.         		idx=i;
  32.         	}
  33.         }
  34.  
  35.         return ans;
  36. }
  37. int main() {
  38. 	vector<int>a = {1,20,21,22,23,3,2,5,4,-11,-12};
  39. 	vector<int>v = rearrangeArray(a);
  40. 	return 0;
  41. }
Success #stdin #stdout 0.01s 5256KB
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stdin
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Standard input is empty
stdout
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1 -11 20 -12 21 1000000000 22 1000000000 23 1000000000 3 1000000000 2 1000000000 5 1000000000 4 1000000000 1000000000 1000000000 1000000000 1000000000 1000000000
https://ideone.com/jkVKgB
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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