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A.cpp
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A.cpp
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#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
#define vsort sort(v.begin(),v.end())
#define mod 1000000007
#define fastio ios_base::sync_with_stdio(false),cin.tie(NULL),cout.tie(NULL);
void Remove_Smallest()
{
int n;
cin >> n;
std::vector<int> v;
for (int i = 0; i < n; ++i)
{
int num;
cin >> num;
v.pb(num);
}
vsort;
int flag = 0;
for (int i = 1; i <n; ++i)
{
if(v[i] - v[i-1] <= 1)
{
continue;
}
else
{
flag = 1;
break;
}
}
if(flag == 0)
{
cout << "YES" << endl;
}
else
{
cout << "NO" << endl;
}
return;
}
int main()
{
fastio
#ifndef ONLINE_JUDGE
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
#endif
int T;
cin >> T;
while (T-- > 0)
{
Remove_Smallest();
}
return 0;
}