A chef has collected data on the satisfaction level of his n dishes. Chef can cook any dish in 1 unit of time.
Like-time coefficient of a dish is defined as the time taken to cook that dish including previous dishes multiplied by its satisfaction level i.e. time[i] * satisfaction[i].
Return the maximum sum of like-time coefficient that the chef can obtain after dishes preparation.
Dishes can be prepared in any order and the chef can discard some dishes to get this maximum value.
Example 1:
Input: satisfaction = [-1,-8,0,5,-9]
Output: 14
Explanation: After Removing the second and last dish, the maximum total like-time coefficient will be equal to (-1*1 + 0*2 + 5*3 = 14).
Each dish is prepared in one unit of time.
Example 2:
Input: satisfaction = [4,3,2]
Output: 20
Explanation: Dishes can be prepared in any order, (2*1 + 3*2 + 4*3 = 20)
Example 3:
Input: satisfaction = [-1,-4,-5]
Output: 0
Explanation: People do not like the dishes. No dish is prepared.
Constraints:
n == satisfaction.length
1 <= n <= 500
-1000 <= satisfaction[i] <= 1000
SOLUTION
class Solution {
public int maxSatisfaction(int[] satisfaction) {
int ans = 0;
int sumSatisfaction = 0;
satisfaction = Arrays.stream(satisfaction)
.boxed()
.sorted(Collections.reverseOrder())
.mapToInt(Integer::intValue)
.toArray();
for (final int s : satisfaction) {
sumSatisfaction += s;
if (sumSatisfaction <= 0)
return ans;
ans += sumSatisfaction;
}
return ans;
}
}