珠心算测试(c++版)

• #include <iostream>
  using namespace std;
  int main()
  {
  	int n,i,j,t=0;
  	int a[30000],b[200];
  	cin>>n;
  	for (i=1;i<=n;i++)
  	{
  		cin>>b[i];
  		a[b[i]]=1;
  	}
  	for (i=1;i<=n-1;i++)
  	{
  		for (j=i+1;j<=n;j++)
  		if (a[(b[i]+b[j])]==1)
  		{
  			a[b[i]+b[j]]=0;
  			t=t+1;
  		}
  	}
  	cout<<t;
  	return 0;
  }