90分，点2wa，求助

#include<iostream>
#include<string>
using namespace std;    
int main()
{
    int dic[1005] = {-1};
    int length , mem , time = 1 , able = 0;
    int pas[1000];
    cin >> mem >> length;
    for(int i = 0 ; i < length ; i ++)
    {
        cin >> pas[i];
    }
    for(int i = 0 ; i < length ; i ++)
    {
        if(i == 0) dic[0] = pas[i];
        else
        {
            for(int j = 0 ; j < mem ; j ++)
            {
                if(dic[j] == pas[i]) able = 1;
            }
            if(able == 0)  //添加字典
            {
                time ++;
                for(int k = mem - 1 ; k >= 0 ; k --)
                {
                    dic[k + 1] = dic[k];
                }
                dic[0] = pas[i];
            }
            able = 0;
        }
    }
    cout << time;
}