| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 969872 | 2024-04-25T17:49:12 Z | starchan | Bootfall (IZhO17_bootfall) | C++17 | 0 ms | 0 KB |
#include<bits/stdc++.h>
using namespace std;
#define in array<int, 2>
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
const int mod = 2,543,568,463;
const int SMX = 2e5+5e4+10;
const int MX = 5e5+10;
int dp[MX];
void add(int x)
{
for(int i = MX-1; i >= x; i--)
{
dp[i]+=dp[i-x];
dp[i]%=mod;
}
return;
}
void rem(int x)
{
for(int i = x; i < MX; i++)
{
dp[i]-=dp[i-x]; dp[i]+=mod;
dp[i]%=mod;
}
return;
}
int cnt[SMX];
signed main()
{
fast();
dp[0] = 1;
int n;
cin >> n;
int S = 0;
vector<int> a(n+1);
for(int i = 1; i <= n; i++)
{
cin >> a[i]; S+=a[i];
add(a[i]);
}
if(S%2 || (dp[S/2] == 0))
{
cout << "0\n";
return 0;
}
for(int i = 1; i <= n; i++)
{
rem(a[i]);
for(int V = 0; V < SMX; V++)
{
int D = S+V-a[i];
if(D%2)
continue;
if(dp[(D/2)] || ((D >= 2*V) && ((dp[(D/2)-V]))))
cnt[V]++;
}
add(a[i]);
}
vector<int> v;
for(int i = 0; i < SMX; i++)
{
if(cnt[i] == n)
v.pb(i);
}
cout << v.size() << "\n";
for(int x: v)
cout << x << " ";
cout << "\n";
return 0;
}