Educational Codeforces Round 47 (Rated for Div. 2) A.Game Shopping(水题)

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
int a[1005],b[1005];
int n,m;

int main()
{
  cin>>n>>m;
  for(int i=0;i<n;i++){
    cin>>a[i];
  }
  for(int i=0;i<m;i++){
    cin>>b[i];
  }
  int num1 = 0;
  int num2 = 0;
  int sum = 0;
  while(num1 < n && num2 < m){
    if(a[num1] > b[num2]){
      num1++;
      continue;
    }
      sum++;
      num1++;
      num2++;
  }
  cout<<sum<<endl;
  return 0;
}