#include <iostream>
#include <algorithm>
using namespace std;

int main()
{

int freq;

while (cin >> freq)
{
int* input = new int;
for (int i = 0; i < freq; ++i)
cin >> input[i];

sort(input, input + freq);

bool flag = true;
for (int i = 0; i < freq-1; i++)
{
flag = input[i]+1 != input[i+1] ? false : true;
if (flag==false) break;
}

if (flag == true)
cout <<input[0]<<' '<<input[freq-1]<< " yes" << endl;
else
cout <<input[0]<<' '<<input[freq-1]<< " no" << endl;

}

}

您的答案為: 1 8241 no
正確答案為: 1 10 no

您的答案為: 99 0 yes
正確答案為: 99 106 yes