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- package com.loveCoding.homework.j20250517;
- public class T12 {
- public static void main(String[] args) {
- int[] arr={3,1,4,5};
- int sum=0;
- for (int i = 0; i < arr.length; i++) {
- sum+=arr[i];
- }
- int s2=0;
- for (int i = 1; i <= arr.length+1; i++) {
- s2+=i;
- }
- System.out.println(s2-sum);
- }
- }
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