#include<iostream>
#include<cstring>
#include<stdlib.h>

using namespace std;


int main()
{	
	long long caseNum;
	while(cin>>caseNum)
	{
		if(caseNum == 0) break;
		else
		{	
			int *table;
			table = (int *)malloc(10000000*sizeof(int));
			memset(table,0,10000000);	
			long long big = -100;
			long long small = 100;

			for(long i = 0;i < caseNum; i ++)
			{	
				long long deal;
				cin>>deal;
				if(big < deal) big = deal;
				if(small > deal) small = deal;

				table[deal] ++;
			}
			
			long threadhold = caseNum / 2;
			//cout<<"t "<<threadhold<<endl;

			long j;
			for( j = small; j <= big; j ++)
			{
				//cout<<j<<" "<<table[j]<<endl;
				if(table[j] > threadhold) 
				{
					cout<<j<<endl;
					break;
				}
			}
			if(j > big)
			{
				cout<<"NO COLOR"<<endl;
			}
			free(table);
		}
	}
	return 0;
}