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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int maxSubGroups(vector<int>arr){
  5. 	int n=arr.size();
  6. 	vector<int>sortedArr = arr;
  7. 	sort(sortedArr.begin(), sortedArr.end());
  8. 	map<int,int>m;
  9. 	for(int i=0;i<sortedArr.size();i++)
  10. 		m[sortedArr[i]]=i;
  11. 	int maxGroups = 0, maxIndex=0;
  12. 	for(int i=0;i<n;i++){
  13. 		maxIndex = max(maxIndex, m[arr[i]]);
  14. 		if(maxIndex == i)
  15. 			maxGroups++;
  16. 	}
  17. 	return maxGroups;
  18. }
  19.  
  20. int main() {
  21. 	vector<int>arr = {1, 5, 4, 9, 8, 7, 12, 13, 14};
  22. 	int maxGroups = maxSubGroups(arr);
  23. 	cout<<maxGroups;
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/f1N7nl
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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