Untitled

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
using namespace std;
const int maxn = 1005;
typedef long long ll;
int dp[maxn][maxn];
ll pref_sum[maxn];
ll sum(int L, int R) {
    return pref_sum[R] - pref_sum[L - 1];
}
ll bin_search(int i, int j, ll s) {
    int L = i, R = j;
    while(L <= R) {
        int mid = (L + R) / 2;
        ll x = sum(i, mid);
        if(x == s and (mid == i or sum(i, mid - 1) != s)) {
            return mid;
        }
        else if(x >= s) {
            R = mid - 1;
        }
        else {
            L = mid + 1;
        }
    }
    return -1;
}
int rec(int i, int j) {
    ll s = sum(i, j);
    if(i < j and s % 2 == 0) {
        int idx = bin_search(i, j, s / 2);
        if(idx != -1) {
            return max(rec(i, idx), rec(idx + 1, j)) + 1;
         }
    }
    return 0;
}
int main() {
    ios_base::sync_with_stdio(false);
    int t;
    cin >> t;
    while(t--) {
        int n;
        cin >> n;
        vector v(n);
        ll s = 0;
        for(int i =0 ; i < n; i++) {
            cin >> v[i];
            s += v[i];
            pref_sum[i] = s;
        }
        cout << rec(0, n - 1) << endl;
    }
    return 0;
}
/*
 5 9 7
...##....
..#.##..#
..#....##
.##...#..
....#....
WS?EE??
 
 
 **/