#include<bits/stdc++.h>
using namespace std;
#define optimize() ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl '\n'
#define ll long long int
int main()
{
    optimize();
    int t;
    cin>>t;
    while(t--)
    {
        int n,c=0;
        cin>>n;
        vector<int>v(n),v1;
        for(auto &i:v)cin>>i;
        for(int i=1;i<=n;i++)v1.push_back(i);
        sort(v.begin(),v.end());
        for(int i=0;i<n;i++)
        {
           if(v[i]==v1[i])c++;
        }
        if(c==n)cout<<"YES"<<endl;
        else cout<<"NO"<<endl;

    }
    return 0;
}