private static int[] candy(int[] ratings) {
int[] candy = new int[ratings.length];
Arrays.fill(candy, 1);
// increasing
for (int i = 1; i < ratings.length; i++) {
if (ratings[i] > ratings[i - 1]) {
candy[i] = candy[i - 1] + 1;
}
}
// decreasing
for (int j = ratings.length - 2; j >= 0; j--) {
if (ratings[j] > ratings[j + 1]) {
if (((j - 1 >= 0)) && (ratings[j - 1] < ratings[j])) {
candy[j] = Math.max(candy[j], candy[j - 1] + 1);
} else {
candy[j] = candy[j + 1] + 1;
}
}
}
// int sum = 0;
// for(int k=0; k<candy.length; k++) sum+=candy[k];
return candy;
}
public static int findSameMin(int[] A, int[] B) {
Arrays.sort(A);
Arrays.sort(B);
int indexA = 0;
int indexB = 0;
while (indexA < A.length && indexB < B.length) {
int headOfA = A[indexA];
int headOfB = B[indexB];
if (headOfA == headOfB) {
return headOfA;
} else if (headOfA < headOfB) {
indexA++;
} else {
indexB++;
}
}
return -1;
}
private static List<List<Integer>> threeSum(int[] num) {
List resultList = new ArrayList<ArrayList>();
Arrays.sort(num);
int length = num.length;
for (int i = 0; i < length - 2; ) {
int j = i + 1, k = length - 1;
while (j < k) {
int sum = num[i] + num[j] + num[k];
if (sum == 0) {
List<Integer> list = new ArrayList<Integer>();
list.add(num[i]);
list.add(num[j]);
list.add(num[k]);
resultList.add(list);
do {
j++;
} while (num[j] == num[j - 1]);
do {
k--;
} while (num[k] == num[k + 1]);
} else if (sum > 0) {
do {
k--;
} while (num[k] == num[k + 1]);
} else {
do {
j++;
} while (num[j] == num[j - 1]);
}
}
do {
i++;
} while (num[i] == num[i - 1]);
}
return resultList;
}