UVA

简单模拟

STL判重

//#pragma GCC optimize(2)
#include <cstdio>
#include <iostream>
#include <cstdlib>
#include <cmath>
#include <cctype>
#include <string>
#include <cstring>
#include <algorithm>
#include <stack>
#include <queue>
#include <set>
#include <sstream>
#include <map>
#include <ctime>
#include <vector>
#include <fstream>
#include <list>
#include <iomanip>
#include <numeric>
using namespace std;
typedef long long ll;

const int MAXN = 1e6 + 10;

int len;

int arr[20];

string trans()
{
    string ret = "";
    for(int i = 0; i < len; i++)
    {
        ret = ret + "-";
        int tmp = arr[i];

        while(tmp)
        {
            ret = ret + char((tmp % 10)+'0');
            tmp /= 10;
        }
    }
    return ret;
}

bool judge()
{
    for(int i = 0; i < len; i++)
        if(arr[i] != 0)
            return false;
    return true;
}

int main()
{
    //ios::sync_with_stdio(false);
    //cin.tie(0);     cout.tie(0);
    //freopen("D://test.in", "r", stdin);
    //freopen("D://test.out", "w", stdout);
    int t;

    cin>>t;

    while(t--)
    {
        cin>>len;
        
        for(int i = 0; i < len; i++)
            cin>>arr[i];
        
        set <string> ST;

        ST.insert(trans());

        while(1)
        {
            int rt = arr[0];
		
            for(int i = 0; i < len - 1; i++)
            {
                arr[i] = abs(arr[i] - arr[i + 1]);
            }
			
			arr[len - 1] = abs(arr[len - 1] - rt);
            
			if(judge())
            {
                cout<<"ZERO"<<endl;
                break;
            }

            string ss = trans();

            if(ST.count(ss))
            {
                cout<<"LOOP"<<endl;
                break;
            }
            else
                ST.insert(ss);
        }

    }
    

    return 0;
}