This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/**
* hello
* author: N29
* created: 2024-11-01 10:28:15
**/
#include<bits/stdc++.h>
using namespace std;
#ifndef BADGNU
#pragma GCC target("sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#endif
#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ll long long
#define int ll
#define ld long double
#define y1 cheza
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
template<class T> using ordered_set = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
template<class T> using ordered_multiset = tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;
const int N=1e5+100;
const int M=5001;
const int B=447;
const int mod=998244353;
const ll INF=1e18;
const int dx[]={1,-1,0,0};
const int dy[]={0,0,1,-1};
const double eps=1e-6;
int n;
int a[N];
int pref[N];
bitset<N> dp;
bool check(int l,int r){
int sum=pref[r]-pref[l-1];
if(sum%2)return 0;
sum/=2;
for(int j=0;j<=sum;j++){
dp[j]=0;
}
dp[0]=1;
for(int i=l;i<=r;i++){
for(int j=sum-a[i];j>=0;j--){
dp[j+a[i]]=dp[j+a[i]]|dp[j];
}
}
return dp[sum];
}
void test(){
cin>>n;
for(int i=1;i<=n;i++){
cin>>a[i];
}
for(int i=1;i<=n;i++){
pref[i]=pref[i-1]+a[i];
}
vector<int>v;
for(int k=2;k<=n;k++){
v.push_back(k);
for(int i=1;i+k-1<=n;i++){
int j=i+k-1;
if(!check(i,j)){
v.pop_back();
break;
}
}
}
cout<<v.size()<<' ';
for(auto i:v){
cout<<i<<' ';
}
cout<<'\n';
}
/*
*/
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
// cout.tie(nullptr);
int t2=1;
cin>>t2;
for(int i=1;i<=t2;i++){
test();
}
}
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