public static int minimumTotal(ArrayList<ArrayList<Integer>> triangle) {
if (triangle == null) return 0;
int[] sum = new int[triangle.size() + 1];
for (int i = triangle.size() - 1; i >= 0; i--) {
for (int j = 0; j < triangle.get(i).size(); j++) {
List currentList = triangle.get(i);
sum[j] = (Integer) (currentList.get(j)) + Math.min(sum[j], sum[j + 1]);
}
for (int x = 0; x < sum.length; x++) System.out.print(sum[x] + " ");
System.out.println();
}
return sum[0];
}
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;
}