关于今天的月赛

#include<cstdio>
#include<iostream>
#include<algorithm>
using namespace std;
long long a[4000005];
bool cmp(long long c,long long d)
{
	return c>d;
}
int main()
{
    long long n,m,k,x,i,j,num=0;
    long long ans=0;
  	scanf("%lld %lld",&n,&m);
    for(i=1;i<=n;i++) for(j=1;j<=m;j++) scanf("%lld",&a[++num]);
    scanf("%lld %lld",&k,&x);
    sort(a+1,a+n*m+1,cmp);
	printf("%lld",a[(k-1)*n+1]);
    return 0;
}