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  1. #include <bits/stdc++.h>
  2. #include <stack>
  3. using namespace std;
  4.  
  5. int main() {
  6.  
  7. 	stack<int> p;
  8. 	long long area=0,i,t=0,c,n;
  9. 	cin>>n;
  10. 	int a[n];
  11. 	for(i=0;i<n;i++){
  12. 		cin>>a[i];
  13. 	}
  14. 	for(i=0;i<n;i++){
  15.  
  16. 		if(a[i]>a[p.top()] || p.empty()){
  17. 			p.push(i);
  18. 			continue;
  19. 		}
  20.  
  21. 		else{
  22. 			while(a[i]<a[p.top()]){
  23. 				c=a[i]*(i-p.top()-1);
  24. 				if(p.empty()){
  25. 					t=a[i]*i;
  26. 					area=(area>=t)?area:t;
  27. 					break;
  28. 				}
  29. 				else
  30. 				p.pop();
  31. 				t=max(t,c);
  32. 			}
  33. 		//	c=a[i]*(i-p.top()-1);
  34. 			p.push(i);
  35. 		}
  36.  
  37. 		area=(area>=t)?area:t;
  38. 	}
  39. 	cout<<area;
  40. }
  41.  
Runtime error #stdin #stdout 0s 15240KB
comments (?)
stdin 
5
1
2
3
4
5
stdout 
Standard output is empty
https://ideone.com/d8zGzJ
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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