#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
using namespace std;
int T,N,a[50001];
void solve1(){
  for(int i=0;i<N;++i){
    for(int j=i+1;j<N;++j){
      swap(a[i],a[j]);
      bool f=true;
      for(int k=1;k<N-1;++k){
        if(a[k-1]==a[k]||a[k]==a[k+1]||a[k-1]==a[k+1]||(a[k-1]<a[k]&&a[k]<a[k+1])||(a[k-1]>a[k]&&a[k]>a[k+1])){
          f=false;
          break;
        }
      }
      if(f){
        puts("Yes");
        return;
      }
      swap(a[i],a[j]);
    }
  }
  puts("No");
  return;
}
bool judge(int pos){
  return pos<=0||pos>=N-1||(a[pos-1]!=a[pos+1]&&a[pos-1]<a[pos]&&a[pos]>a[pos+1])||(a[pos-1]!=a[pos+1]&&a[pos-1]>a[pos]&&a[pos]<a[pos+1]);
}
void solve2(){
  vector<int> lis;
  for(int k=1;k<N-1;++k){
    if(a[k-1]==a[k]||a[k]==a[k+1]||a[k-1]==a[k+1]||(a[k-1]<a[k]&&a[k]<a[k+1])||(a[k-1]>a[k]&&a[k]>a[k+1])){
      if(k>1)lis.emplace_back(k-2);
      lis.emplace_back(k-1);
      lis.emplace_back(k);
      lis.emplace_back(k+1);
      if(k+2<N)lis.emplace_back(k+2);
    }
  }
  sort(lis.begin(),lis.end());
  lis.erase(unique(lis.begin(),lis.end()),lis.end());
  if(lis.size()>30){
    puts("No");
    return;
  }
  for(auto x:lis)for(int y=0;y<N;++y){
    if(a[x]==a[y])continue;
    swap(a[x],a[y]);
    bool f=true;
    for(auto k:lis){
      if(!judge(k)){
        f=false;
        break;
      }
    }
    for(int d=-2;d<=2;++d){
      if(!judge(d+y)){
        f=false;
        break;
      }
    }
    if(f){
      puts("Yes");
      return;
    }
    swap(a[x],a[y]);
  }
  puts("No");
}
int main(){
  scanf("%d",&T);
  for(int z=0;z<T;z++){
    scanf("%d",&N);
    for(int i=0;i<N;++i)scanf("%d",&a[i]);
    solve2();
  }
}