first commit

J02014 - ĐIỂM CÂN BẰNG.java

@@ -0,0 +1,29 @@
+package nyagami;
+
+import java.util.Scanner;
+
+public class test{
+    
+    public static void main(String[] arg){
+        Scanner sc = new Scanner(System.in);
+        int t = sc.nextInt();
+        while(t-->0){
+            int n = sc.nextInt();
+            int[] a = new int[n+1];
+            for(int i=1;i<n+1;i++){
+                a[i] = sc.nextInt();
+                a[i]+=a[i-1];
+            }
+            boolean oke = true;
+            for(int i=2;i<n;i++){
+                if(a[i-1]==(a[n]-a[i])){
+                    System.out.println(i);
+                    oke = false;
+                    break;
+                }
+            }
+            if(oke) System.out.println(-1);
+        }
+        sc.close();
+    }
+}