#include<cstdio>
#include<cstring>
int a,b[10010];
int main() {
    int n;
    while(scanf("%d",&n)!=EOF){
        memset(b,0,sizeof(b));
        int ans = -1;
        for(int i=0;i<n;i++){
            scanf("%d",&a);
            b[a]++;
            if(b[a]>n/2){
                ans = a;
            }
        }
        printf("%d\n",ans);
    }
    return 0;
}