I=lambda: map(int, input().split())
for _ in [0]*int(input()):
n=int(input())
a=list(I())
c=list(set(a))
if len(set(a))==1:
print('NO')
else:
x=c[0]
y=c[1]
indx=a.index(x)+1
indy=a.index(y)+1
print('YES')
print(indx,indy)
i=1
for v in a:
if i!=indx and i!=indy:
if v!=x:
print(indx,i)
else:
print(indy,i)
i=i+1#include<iostream>
#include<set>
#include<vector>
#include<map>
#include<set>
#include<algorithm>
using namespace std;
using LL = long long;
const int mod = 1e9+7;
const int M = 500000;
template<class T>
inline void out(T s )
{
cout<<s<<endl;
}
inline void out(bool f)
{
if(f)cout<<"YES\n";
else cout<<"NO\n";
}
template<typename T>
T Max(T &&a,T &&b)
{
return a>b?a:b;
}
template<typename T,typename... Args>
T Max(T &&a, Args... arg)
{
T tmp= Max(arg...);
return Max(a,tmp);
}
int dis(int x,int y,int n,int m)
{
return abs(x-n)+abs(y-m);
}
void fun(int x,int y, int p)
{
}
void ots(string s)
{
bool flag = 1;
for(int i=0;i<s.length();i++)
{
if(flag && s[i] == '0')continue;
cout<<s[i];
flag = 0;
}
if(flag)cout<<"0";
}
const LL INF = 0x3f3f3f3f;
int pre[M];
int fin(int x)
{
return x==pre[x]? x :pre[x] = fin(pre[x]);
}
void solve()
{
int n;
cin>>n;
for(int i=1;i<=n;i++)pre[i] = i;
vector<int>a(n+1);
vector<pair<int,int>>ans;
a[0] = INF;
int num = 0;
for(int i=1;i<=n;i++)cin>>a[i];
for(int i=1;i<n;i++)
for(int j=i+1;j<=n;j++)
{
if(num == n-1)break;
if(a[i] != a[j])
{
int x =fin(i),y = fin(j);
if(x!=y)
{
pre[x] = y;
num++;
ans.push_back({i,j});
}
}
}
out( num == n-1);
if(num == n-1)
for(auto c:ans)
cout<<c.first<<" "<<c.second<<endl;
}
int main()
{
int tt = 1;
cin >> tt;
while(tt--)
solve();
return 0;
}
574A - Bear and Elections | 352B - Jeff and Periods |
1244A - Pens and Pencils | 1670A - Prof Slim |
1189A - Keanu Reeves | 678A - Johny Likes Numbers |
1699C - The Third Problem | 1697D - Guess The String |
754B - Ilya and tic-tac-toe game | 760A - Petr and a calendar |
1573A - Countdown | 166A - Rank List |
1631B - Fun with Even Subarrays | 727A - Transformation from A to B |
822B - Crossword solving | 1623A - Robot Cleaner |
884B - Japanese Crosswords Strike Back | 862B - Mahmoud and Ehab and the bipartiteness |
429A - Xor-tree | 1675C - Detective Task |
950A - Left-handers Right-handers and Ambidexters | 672B - Different is Good |
1C - Ancient Berland Circus | 721A - One-dimensional Japanese Crossword |
1715B - Beautiful Array | 60B - Serial Time |
453A - Little Pony and Expected Maximum | 1715A - Crossmarket |
1715C - Monoblock | 1512C - A-B Palindrome |