#include <bits/stdc++.h>
using namespace std;
int k[1010], p[1010], dp[1010][50010],c;
int main(){
cin>>c;
for(int cc = 0; cc < c; cc++){
int n; cin >> n;
p[0] = 0;
for (int i = 1; i <= n; i++){
cin >> k[i];
}
for (int i = 1; i <= n; i++) p[i] = p[i-1] + k[i];
vector<bool> work(n+1, 1);
for (int i = 1; i <= n; i++){
for (int x = 0; x < vec[i]; x++) dp[i][x] = dp[i - 1][x];
for (int x = k[i]; x< 50010; x++){
dp[i][x] = max(dp[i - 1][x], dp[i - 1][x-k[i]]);
}
dp[i][k[i]] = i;
for (int j = 1; j <= i; j++){
int x = p[i] - p[j - 1];
if (x % 2){
work[i+1-j] = 0;
}
else if (dp[i][x/ 2] < j){
work[i+1-j] = 0;
}
}
}
int ans=0;
for (int i = 1; i <= n; i++)
if (work[i])ans++;
cout << ans << " ";
for (int i = 1; i <= n; i++)
if (work[i])cout << i << ' ';
cout << '\n';
}
return 0;
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:15:33: error: 'vec' was not declared in this scope
15 | for (int x = 0; x < vec[i]; x++) dp[i][x] = dp[i - 1][x];
| ^~~
