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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int trips(int weight[],int num){
  4. 	unordered_map<int,int>w;
  5. 	int count=0;
  6. 	for(int i=0;i<num;i++){
  7. 		w[weight[i]]++;
  8. 	}
  9. 	for(int i=0;i<num;i++){
  10. 		if(w[weight[i]]%3==0){
  11. 			count++;
  12. 		}
  13. 		else{
  14. 			count+=w[i]/3+1;
  15. 		}
  16. 	}
  17. 	return count;
  18.  
  19. }
  20.  
  21. int main() {
  22. 	// your code goes here
  23. 	int n;
  24. 	cin>>n;
  25. 	int packageWeight[n];
  26. 	for(int i=0;i<n;i++){
  27. 		cin>>packageWeight[i];
  28. 	}
  29. 	cout<<"the minimum number of trips are:"<<trips(packageWeight,n);
  30. 	return 0;
  31. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin 
7
1 8 5 8 5 1 1
stdout 
the minimum number of trips are:8
https://ideone.com/xTsIBx
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

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