# Extract a variable will cause time limit exceed..

• Below is my solution, and the funny thing is that if I extract stopIndex - 1 to a variable, it will cause time limit, it means this cost 400ms.... Why???

public class Solution {
public int candy(int[] ratings) {
int prev = -1;

``````    int[] candies = new int[ratings.length];
int lastIndex = 0;
for (int i = 0; i < ratings.length; i++) {
int rating = ratings[i];
if (rating > prev) {
prev = rating;
candies[i] = (i >= 1 ? candies[i - 1] + 1 : 1);
lastIndex = i;
} else {
// 2. i - , find and set desc
int descPrev = rating;
int stopIndex = i + 1;
for (; stopIndex < ratings.length; stopIndex++) {
if (ratings[stopIndex] >= descPrev) {
break;
}
descPrev = ratings[stopIndex];
}
// If I use stopIndex = stopIndex - 1 here, it will cause time limit exceed.
int c = 0;
for (int j = stopIndex - 1; j > lastIndex; j--) {
candies[j] = (++c);
}
if (lastIndex + 1 < stopIndex && ratings[lastIndex] > ratings[lastIndex + 1]) {
candies[lastIndex] = Math.max(candies[lastIndex], candies[lastIndex + 1] + 1);
}
i = stopIndex - 1;
prev = ratings[i];
lastIndex = i;
}
}

int sum = 0;
for (int c : candies) {
sum += c;
}
return sum;
}
``````

}

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