Submission #582543

#	Time	Username	Problem	Language	Result	Execution time	Memory
582543		talant117408	Kpart (eJOI21_kpart)	C++17	0 / 100	13 ms	1888 KiB

Main

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

#define long                unsigned long 
#define pb                  push_back
#define mp                  make_pair
#define all(v)              (v).begin(),(v).end()
#define rall(v)             (v).rbegin(),(v).rend()
#define lb                  lower_bound
#define ub                  upper_bound
#define sz(v)               int((v).size())
#define do_not_disturb      ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl                '\n'
#define PI                  2*acos(0.0)

void solve() {
    int n;
    cin >> n;
    vector <int> v(n+1), pref(n+1);
    for (int i = 1; i <= n; i++) {
        cin >> v[i];
        pref[i] = pref[i-1] + v[i];
    }
    bitset <1001> ans;
    for (int i = 1; i <= n; i++) ans[i] = 1;
    vector <bitset <50001>> dp(n+1);
    dp[0][0] = 1;
    for (int i = 1; i <= n; i++) {
        dp[i] = (dp[i-1] | (dp[i-1] << v[i]));
        for (int j = i; j >= 1; j--) {
            if ((pref[i]-pref[j-1])&1) {
                ans[i-j+1] = 0;
            }
            //~ else if ((pref[i]-pref[j-1])/2 > pref[j-1]) {
                //~ ans[i-j+1] = 0;
                //~ cout << 1 << ' ' << j << ' ' << i << endl;
            //~ }
            else if (dp[i][pref[i]-(pref[i]-pref[j-1])/2] == 0) {
                ans[i-j+1] = 0;
            }
        }
    }
    
    vector <int> K;
    for (int i = 2; i <= n; i++) {
        if (ans[i]) K.pb(i);
    } 
    cout << sz(K) << ' ';
    for (auto to : K) cout << to << ' ';
    cout << endl;
}

int main() {
    do_not_disturb
    
    int t = 1;
    cin >> t;
    while (t--) {
        solve();
    }
    
    return 0;
}
/*

*/

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