hdoj_2034 人见人爱A-B

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=2034

 

//C++代码#include<iostream>#include<algorithm>using namespace std;int main(){int n,m,i,j,k,a[100],b[100];while(cin>>n>>m,n||m){for(i=0;i<n;i++) cin>>a[i];for(i=0;i<m;i++) cin>>b[i];sort(a,a+n);sort(b,b+m);j=k=0;for(i=0;i<n;i++){if(j==m) cout<<a[i]<<" ",k=1;else if(a[i]<b[j]) cout<<a[i]<<" ",k=1;else if(a[i]>=b[j]) j++;}if(k==0) cout<<"NULL";cout<<endl;}return 0;}