#include <bits/stdc++.h>
const int N = 1e6 + 3;
int n;
int p[N],rk[N];
int main()
{
    freopen("a.txt","r",stdin);
    int T;
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        for(int i = 1;i <= n;++i) scanf("%d",&p[i]),rk[p[i]] = i;
        bool flag = 0;
        for(int i = 2;i <= n;++i) flag |= (std::abs(rk[i] - rk[i - 1]) > 2);
        if(!flag) puts("Yes");
        else puts("No");
    }
   //system("pause");
    return 0;
}