Submission #537524

#	Time	Username	Problem	Language	Result	Execution time	Memory
537524		siewjh	Hop (COCI21_hop)	C++17	0 / 110	52 ms	52684 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    int cases; cin >> cases;
    while (cases--){
        int nums; cin >> nums;
        vector<int> vec(nums + 1), pref(nums + 1);
        pref[0] = 0;
        for (int i = 1; i <= nums; i++) cin >> vec[i];
        for (int i = 1; i <= nums; i++) pref[i] = pref[i - 1] + vec[i];
        vector<vector<int>> dp(nums + 1, vector<int>(50005, -1));
        vector<bool> ok(nums + 1, 1);
        for (int i = 1; i <= nums; i++){
            for (int sum = 0; sum < vec[i]; sum++) dp[i][sum] = dp[i - 1][sum];
            for (int sum = vec[i]; sum < 50005; sum++) dp[i][sum] = max(dp[i - 1][sum], dp[i - 1][sum - vec[i]]);
            dp[i][vec[i]] = i;
            for (int j = 1; j <= i; j++){
                int sum = pref[i] - pref[j - 1], sz = i - j + 1;
                if (sum % 2) ok[sz] = 0;
                else if (dp[i][sum / 2] < j) ok[sz] = 0;
            }
        }
        int cnt = 0;
        for (int i = 1; i <= nums; i++)
            if (ok[i])
                cnt++;
        cout << cnt << ' ';
        for (int i = 1; i <= nums; i++)
            if (ok[i])
                cout << i << ' ';
        cout << '\n';
    }
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 100