mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
28 lines
552 B
C++
28 lines
552 B
C++
#include <iostream>
|
|
#include <cstdlib>
|
|
#include <cstdio>
|
|
#include <algorithm>
|
|
#include <iostream>
|
|
#include <cstring>
|
|
using namespace std;
|
|
const int maxn = 10010;
|
|
int cnt[maxn];
|
|
int main()
|
|
{
|
|
int n;
|
|
while(scanf("%d", &n) == 1)
|
|
{
|
|
memset(cnt, 0, sizeof(cnt));
|
|
int ans = -1;
|
|
for(int i = 0; i < n+1; i++)
|
|
{
|
|
int tmp;
|
|
scanf("%d", &tmp);
|
|
cnt[tmp]++;
|
|
if(cnt[tmp] >= 2)
|
|
ans = tmp;
|
|
}
|
|
printf("%d\n", ans);
|
|
}
|
|
}
|