Merge branch 'opencodeiiita:main' into main

Author: PHOX-9

Problems/Mathematics/Day-01/sol/Prashant_dwivedi/Solution1.java

@@ -0,0 +1,60 @@
+// 1. Problem Statement -------------------------------------------------
+/*
+There are n people standing in a circle, where n is even.
+Each person looks at the person standing exactly opposite to them.
+
+You are given three distinct integers a, b, and c.
+It is known that person a is looking at person b.
+
+Determine the person that person c is looking at.
+If such a person cannot exist, print -1.
+*/
+
+// 2. Approach -----------------------------------------------------------
+/*
+The pair (a, b) fixes the entire circle.
+Once the circle is fixed, every person has exactly one opposite person.
+
+If person c does not fit into this fixed circle, the answer is -1.
+Otherwise, move half the circle from c to find the person they are looking at.
+*/
+
+// 3. Complexity ---------------------------------------------------------
+/*
+Time Complexity: O(1) per test case
+Space Complexity: O(1)
+*/
+
+//4. problem submission link-----------------------------------
+// https://codeforces.com/problemset/status?my=on
+
+// Compiling Code in Java (Solution1.java) -------------------------------
+
+import java.util.*;
+
+public class Solution1 {
+
+    public static int findOpposite(int a, int b, int c) {
+        int n = 2 * Math.abs(a - b);
+        if (a > n || b > n || c > n) {
+            return -1;
+        }
+        int half = n / 2;
+        if (c + half <= n) {
+            return c + half;
+        }
+        return c - half;
+    }
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int t = sc.nextInt();
+        while (t-- > 0) {
+            int a = sc.nextInt();
+            int b = sc.nextInt();
+            int c = sc.nextInt();
+            System.out.println(findOpposite(a, b, c));
+        }
+        sc.close();
+    }
+}

contributers.md

@@ -21,10 +21,18 @@
 | Saurav Gitte           | SauravGitte             | IIIT Allahabad                                                   |
 | Avaneesh Verma         | avaneeshk2307-wq        | IIIT Allahabad                                                   |
 | Aditya Shirsatrao      | adityashirsatrao007     | N. K. Orchid College Of Engineering & Technology, Solapur        |
+| Sourish Awasthi        | LooninS                 | IIIT Allahabad                                                   |
+| Ishan Tripathi         | ishantripathi64         | IIIT Allahabad                                                   |
+| Lavay Garg             | lavaygarg               | IIIT Allahabad                                                   |
+| Kushagra Sahu          | KushagraSahu-01         | IIIT Allahabad                                                   |
 | Sourish Awasthi         | LooninS                | IIIT Allahabad                  |
 | Ishan Tripathi          | ishantripathi64        | IIIT Allahabad                  |
 | Lavay Garg              | lavaygarg              | IIIT Allahabad                  |
+| Himanshu Vitthalani     | Himanshu-1903          | IIIT Allahabad
 | Abhishek Tripathi      | Astinel-prime           | IIIT Allahabd                                                    |
 | Ibrahim Raza Beg       | PHOX-9                  | IIIT Allahabd                                                    |
+| Vaishali ojha          | Nomen06                  | IIIT Allahabd                                                    |
+| Siddhant Shekhar       | sshekhar563             | United University                                                |
+| Ayush Saha             | verifiedHuman18         | IIIT Allahabad                                                   |
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