排序取中位数
#include<iostream>
#include<algorithm>
using namespace std;
int main(){
freopen("1.in", "r", stdin);
int m, n;
//cin >> m >> n;
scanf("%d%d", &m, &n);
int *a = new int[m*n];
int i = 0;
while (i < m*n){
scanf("%d", &a[i]);
//cin >> a[i];
i++;
}
sort(a, a + m*n);
cout << a[m*n / 2] << endl;
return 0;
}