Leetcode/src/main/java/com/fishercoder/solutions/fourththousand/_3354.java at master · fishercoder1534/Leetcode · GitHub

Name: Leetcode/src/main/java/com/fishercoder/solutions/fourththousand/_3354.java at master · fishercoder1534/Leetcode · GitHub
Rating: 4.7 (8010 reviews)
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packagecom.fishercoder.solutions.fourththousand;

importjava.util.Arrays;

publicclass_3354 {
publicstaticclassSolution1 {
publicintcountValidSelections(int[] nums) {
intcount = 0;
for (inti = 0; i < nums.length; i++) {
if (nums[i] == 0) {
if (isValidWithMoveDirection(nums, i, true)) {
count++;
 }
if (isValidWithMoveDirection(nums, i, false)) {
count++;
 }
 }
 }
returncount;
 }

privatebooleanisValidWithMoveDirection(int[] nums, intindex, booleanmoveLeft) {
int[] copy = Arrays.copyOf(nums, nums.length);
while (index >= 0 && index < nums.length) {
if (moveLeft) {
if (copy[index] > 0) {
copy[index]--;
moveLeft = !moveLeft;
index++;
 } else {
index--;
 }
 } else {
if (copy[index] > 0) {
copy[index]--;
moveLeft = !moveLeft;
index--;
 } else {
index++;
 }
 }
 }
for (intnum : copy) {
if (num != 0) {
returnfalse;
 }
 }
returntrue;
 }
 }
}