23 lines
391 B
Java
23 lines
391 B
Java
package Course_Codes;
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import java.util.Scanner;
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//输入n和n-1个整数，输出只出现1次的个数
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public class LQ_008 {
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public static void main(String[] args) {
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Scanner sc=new Scanner(System.in);
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int n,ans=0;//读入几个数
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while(sc.hasNext()) {
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n=sc.nextInt();
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ans=0;
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for(int i=0;i<n;i++) {
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ans=ans^sc.nextInt();
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}
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System.out.print(ans);
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}
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}
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}
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