first commit

J03018 - TÌM SỐ DƯ.java

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+import java.math.*;
+import java.util.*;
+
+public class Main {
+
+    static int pow(int a, int b) {
+        if (b == 0)
+            return 1;
+        return a * pow(a, b - 1);
+    }
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int t = sc.nextInt();
+        while (t-- > 0) {
+            BigInteger n = new BigInteger(sc.next());
+            int a = Integer.parseInt(n.mod(BigInteger.valueOf(4)).toString());
+            int b = Integer.parseInt(n.mod(BigInteger.valueOf(2)).toString());
+            int s = 1 + pow(2, a) + pow(3, a) + pow(4, b);
+            System.out.println(s%5);
+        }
+    }
+}