AC

Author: dungnguyen-art

Diff for: Point_Balanced.java

@@ -0,0 +1,34 @@
+import java.util.*;
+public class Point_Balanced {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        int T = in.nextInt();
+        while(T-->0){
+            int n = in.nextInt();
+            long a[] = new long[n];
+            long sum = 0;
+            for(int i=0;i<n;i++){
+                a[i] = in.nextLong();
+                sum += a[i];
+            }
+            boolean check = false;
+            if(n < 3)
+                System.out.println("-1");
+            else{
+                long sTmp = a[0];
+                for(int i=1;i<n;i++){
+                    if(sTmp == sum-sTmp-a[i]){
+                        check = true;
+                        System.out.println(i+1);
+                        break;
+                    }
+                    else{
+                        sTmp += a[i];
+                    }
+                }
+                if(check == false)
+                    System.out.println("-1");
+            }
+        }
+    }
+}