这份代码过不了样例，却AC本题！

#include<bits/stdc++.h>
using namespace std;
signed main(){
    int n,m;
    cin>>n>>m;
    int w[n+5],c[m+5];
    for(int i=1;i<=n;i++)cin>>w[i];
    for(int i=1;i<=m;i++)cin>>c[i];
    sort(w+1,w+n+1);
    sort(c+1,c+m+1);
    int i=1,j=1,ans=0;
    while(i<=n&&j<=m){
    	if(w[i]>c[j]){
    		ans++;
    		i++,j++;
		}
		else i++;
	}
	cout<<ans;
    return 0;
}