#include <bits/stdc++.h>
#define all(X) X.begin(), X.end()
#define sz(x) (int)x.size()
#define fr first
#define sc second
#define endl '\n'
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
const int maxn = 1e6 + 10;
const int maxa = 1e6;
const int inf = 2e9;
const ll INF = 1e18;
const ll mod = 1e9 + 7;
const int block = 350;
int main ()
{
ios_base::sync_with_stdio(0); cin.tie();
/*#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif*/
int n; cin >> n;
vector <int> a (n);
for (int i = 0; i < n; i++) {
cin >> a[i];
}
bitset <25100> st;
int sum = 0;
st[0] = 1;
for (int i = 0; i < n; i++) {
st |= (st << a[i]);
sum += a[i];
}
if ((sum & 1)) {
cout << 0;
return 0;
} else if (!st[sum >> 1]) {
cout << 0;
return 0;
}
vector <bitset <n * 500>> t (n);
for (int sk = 0; sk < n; sk++) {
t[sk][0] = 1;
for (int j = 0; j < n; j++) {
if (j != sk) {
t[sk] |= (t[sk] << a[j]);
}
}
}
vector <int> ans;
for (int i = 1; i <= n * 500; i++) {
vector <bitset <n * 500>> tt = t;
sum += i;
bool ok = true;
for (int j = 0; j < n; j++) {
tt[j] |= (tt[j] << i);
sum -= a[j];
if ((sum & 1)) {
ok = false;
sum += a[j];
break;
} else if (!tt[j][sum >> 1]) {
ok = false;
sum += a[j];
break;
} else {
sum += a[j];
}
}
sum -= i;
if (ok) ans.push_back(i);
}
cout << sz(ans) << endl;
for (auto i : ans) {
cout << i << " ";
}
return 0;
}
Compilation message
bootfall.cpp: In function 'int main()':
bootfall.cpp:49:22: error: the value of 'n' is not usable in a constant expression
49 | vector <bitset <n * 500>> t (n);
| ^~~
bootfall.cpp:29:6: note: 'int n' is not const
29 | int n; cin >> n;
| ^
bootfall.cpp:49:22: error: the value of 'n' is not usable in a constant expression
49 | vector <bitset <n * 500>> t (n);
| ^~~
bootfall.cpp:29:6: note: 'int n' is not const
29 | int n; cin >> n;
| ^
bootfall.cpp:49:20: note: in template argument for type 'long unsigned int'
49 | vector <bitset <n * 500>> t (n);
| ~~^~~~~
bootfall.cpp:49:25: error: template argument 1 is invalid
49 | vector <bitset <n * 500>> t (n);
| ^~
bootfall.cpp:49:25: error: template argument 2 is invalid
bootfall.cpp:51:4: error: invalid types 'int[int]' for array subscript
51 | t[sk][0] = 1;
| ^
bootfall.cpp:54:6: error: invalid types 'int[int]' for array subscript
54 | t[sk] |= (t[sk] << a[j]);
| ^
bootfall.cpp:54:16: error: invalid types 'int[int]' for array subscript
54 | t[sk] |= (t[sk] << a[j]);
| ^
bootfall.cpp:60:23: error: the value of 'n' is not usable in a constant expression
60 | vector <bitset <n * 500>> tt = t;
| ^~~
bootfall.cpp:29:6: note: 'int n' is not const
29 | int n; cin >> n;
| ^
bootfall.cpp:60:23: error: the value of 'n' is not usable in a constant expression
60 | vector <bitset <n * 500>> tt = t;
| ^~~
bootfall.cpp:29:6: note: 'int n' is not const
29 | int n; cin >> n;
| ^
bootfall.cpp:60:21: note: in template argument for type 'long unsigned int'
60 | vector <bitset <n * 500>> tt = t;
| ~~^~~~~
bootfall.cpp:60:26: error: template argument 1 is invalid
60 | vector <bitset <n * 500>> tt = t;
| ^~
bootfall.cpp:60:26: error: template argument 2 is invalid
bootfall.cpp:64:6: error: invalid types 'int[int]' for array subscript
64 | tt[j] |= (tt[j] << i);
| ^
bootfall.cpp:64:16: error: invalid types 'int[int]' for array subscript
64 | tt[j] |= (tt[j] << i);
| ^
bootfall.cpp:70:18: error: invalid types 'int[int]' for array subscript
70 | } else if (!tt[j][sum >> 1]) {
| ^
