#include "bits/stdc++.h"
using namespace std;
#define int long long
#define FOR(i, a, b) for(int i=(a);i<(b);i++)
#define RFOR(i, a, b) for(int i=(b-1);i>=(a);i--)
#define REP(i, n) for(int i=0; i<(n); i++)
#define RREP(i, n) for(int i=(n-1); i>=0; i--)
#define ALL(a) (a).begin(),(a).end()
#define UNIQUE_SORT(l) sort(ALL(l)); l.erase(unique(ALL(l)), l.end());
#define CONTAIN(a, b) find(ALL(a), (b)) != (a).end()
#define array2(type, x, y) array<array<type, y>, x>
#define vector2(type) vector<vector<type> >
#define out(...) printf(__VA_ARGS__)

int dxy[] = {0, 1, 0, -1, 0};

/*================================*/

int T,N;
int A[111];

vector<vector<int>> count_dp(int A[], vector<vector<int>> DP) {
    REP(i,N+1)REP(j,N+1)DP[i][j]=0;
    REP(i,N+1)FOR(j,i,N+1)FOR(k,j+1,N+1){
        if (j>0 && A[k-1] <= A[j-1]) continue;
        if (i!=0) {
            int prev = A[j-1] - A[i-1];
            int diff = A[k-1] - A[j-1];
            if (diff <= prev) continue;
        }
        DP[j][k] = max(DP[j][k], DP[i][j] + 1);
    }
    return DP;
}

signed main()
{
#if DEBUG
    std::ifstream in("input.txt");
    std::cin.rdbuf(in.rdbuf());
#endif
    cin>>T;

    while(T--) {
        cin>>N;
        REP(i,N)cin>>A[i];
        vector<vector<int>> DP(N+1, vector<int>(N+1, 0));
        auto DPa = count_dp(A, DP);
        reverse(A, A+N);
        auto DPb = count_dp(A, DP);
        int ans = 0;
        FOR(i,1,N+1) {
            int a = 0, b = 0;
            REP(j,i) {
                a = max(a, DPa[j][i]);
            }
            REP(j,N-i+1) {
                b = max(b, DPb[j][N-i+1]);
            }
            ans = max(ans, a + b - 1);
        }
        cout << ans << endl;
    }
    
    return 0;
}