add 2485

Author: fishercoder1534

paginated_contents/algorithms/3rd_thousand/README.md

@@ -30,6 +30,7 @@
 | 2515 | [Shortest Distance to Target String in a Circular Array](https://leetcode.com/problems/shortest-distance-to-target-string-in-a-circular-array/)                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2515.java)                                       || Easy                                 ||
 | 2496 | [Maximum Value of a String in an Array](https://leetcode.com/problems/maximum-value-of-a-string-in-an-array/)                                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2496.java)                                       || Easy                                 ||
 | 2492 | [Minimum Score of a Path Between Two Cities](https://leetcode.com/problems/minimum-score-of-a-path-between-two-cities/)                                                                                                             | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2492.java)                                       || Medium                               | Union Find                
+| 2485 | [Find the Pivot Integer](https://leetcode.com/problems/find-the-pivot-integer/)                                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2485.java)                                       || Easy                                 ||
 | 2467 | [Convert the Temperature](https://leetcode.com/problems/convert-the-temperature/)                                                                                                             | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2469.java)                                       || Easy                                 ||
 | 2455 | [Average Value of Even Numbers That Are Divisible by Three](https://leetcode.com/problems/average-value-of-even-numbers-that-are-divisible-by-three/)                                         | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2455.java)                                       || Easy                                 ||
 | 2433 | [Find The Original Array of Prefix Xor](https://leetcode.com/problems/find-the-original-array-of-prefix-xor/)                                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2433.java)                                       | [:tv:](https://youtu.be/idcT-p_DDrI) | Medium                    ||

src/main/java/com/fishercoder/solutions/thirdthousand/_2485.java

@@ -0,0 +1,24 @@
+package com.fishercoder.solutions.thirdthousand;
+
+public class _2485 {
+    public static class Solution1 {
+        public int pivotInteger(int n) {
+            int sum1 = 1;
+            int sum2 = 0;
+            for (int i = 1; i <= n; i++) {
+                sum2 += i;
+            }
+            if (sum1 == sum2) {
+                return n;
+            }
+            for (int i = 2; i <= n; i++) {
+                sum1 += i;
+                sum2 -= i - 1;
+                if (sum1 == sum2) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+    }
+}

src/test/java/com/fishercoder/thirdthousand/_2485Test.java

@@ -0,0 +1,21 @@
+package com.fishercoder.thirdthousand;
+
+import com.fishercoder.solutions.thirdthousand._2485;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class _2485Test {
+    private static _2485.Solution1 solution1;
+
+    @BeforeEach
+    public void setup() {
+        solution1 = new _2485.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(1, solution1.pivotInteger(1));
+    }
+}