Question
Given a list of daily temperatures T, return a list such that, for each day in the input, tells you how many days you would have to wait until a warmer temperature. If there is no future day for which this is possible, put 0 instead.
For example, given the list of temperatures T = [73, 74, 75, 71, 69, 72, 76, 73], your output should be [1, 1, 4, 2, 1, 1, 0, 0].
Solution
TODO
Code
class Solution {
public int[] dailyTemperatures(int[] T) {
int[] results = new int[T.length];
Stack<Integer> s = new Stack<>();
for(int i=0; i<T.length; i++) {
while(!s.isEmpty() && T[s.peek()] < T[i]) {
int j = s.pop();
results[j] = i-j;
}
s.push(i);
}
return results;
}
}
Performance
O(n)