poj 1323 Game Prediction

#include<iostream>
#include<algorithm>
#include<list>
using namespace std;
bool cmp(const int a,const int b)
{
return a>b;
}
int main()
{
int n,m,i,count,ff=0;int cards[51];
while (cin>>m>>n&&n&&m)
    {
for(i=1;i<=n;i++)
            cin>>cards[i];
        sort(cards+1,cards+n+1,cmp);
        list<int> tmp;
for(i=n*m;i>=cards[n];i--)
            tmp.push_back(i);
        count=0;
for(i=1;i<=n;i++)
if(cards[i]==tmp.front())
            {
                count++;
                tmp.pop_front();
            }
else 
            {
                tmp.pop_front();
                tmp.remove(cards[i]);
            }
        cout<<"Case "<<++ff<<": "<<count<<endl;
    }
return 0;
}