Submission #537417

#	Time	Username	Problem	Language	Result	Execution time	Memory
537417		maomao90	Kpart (eJOI21_kpart)	C++17	10 / 100	2085 ms	720 KiB

Main

// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define MP make_pair
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define MT make_tuple
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

#define INF 1000000005
#define LINF 1000000000000000005ll
#define MAXN 1005
#define MAXA 100005

int t;
int n;
int a[MAXN];
bool valid[MAXN];
int dp[MAXA];

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> t;
    while (t--) {
        cin >> n;
        REP (i, 0, n) {
            cin >> a[i];
        }
        REP (i, 1, n + 1) {
            valid[i] = 0;
        }
        REP (k, 2, n + 1) {
            if (valid[k]) continue;
            int sm = 0;
            REP (i, 0, k) {
                sm += a[i];
            }
            if (sm % 2 == 1) {
                continue;
            }
            bool pos = 1;
            REP (i, k, n) {
                if (a[i] % 2 != a[i % k] % 2) {
                    pos = 0;
                    break;
                }
            }
            if (!pos) continue;
            cerr << k << '\n';
            memset(dp, 0, sizeof dp);
            dp[0] = 1;
            sm = 0;
            auto add = [&] (int x) {
                sm += x;
                RREP (i, MAXA - 1, x) {
                    dp[i] += dp[i - x];
                }
            };
            auto remove = [&] (int x) {
                sm -= x;
                REP (i, x, MAXA) {
                    dp[i] -= dp[i - x];
                }
            };
            REP (i, 0, k) {
                add(a[i]);
            }
            REP (i, 0, n - k + 1) {
                if (!dp[sm / 2]) {
                    pos = 0;
                    break;
                }
                if (i == n - k) continue;
                remove(a[i]);
                add(a[i + k]);
            }
            if (!pos) continue;
            for (int i = k; i <= n; i += k) {
                valid[i] = 1;
            }
        }
        vi ans;
        REP (k, 2, n + 1) {
            if (valid[k]) {
                ans.pb(k);
            }
        }
        cout << ans.size();
        for (int i : ans) {
            cout << ' ' << i;
        }
        cout << '\n';
    }
    return 0;
}

/*
2
7
7 3 5 1 3 3 5
6
1 2 3 5 8 3
*/

• Subtask 1: 10 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 70