Submission #1333210

#	Time	Username	Problem	Language	Result	Execution time	Memory
1333210		aaaaaaaa	Bootfall (IZhO17_bootfall)	C++20	100 / 100	234 ms	5804 KiB

bootfall

#include <bits/stdc++.h>
using namespace std;
#define int long long


const int mxN = 500 * 500 + 10;

int a[505], dp[mxN], freq[mxN];

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);

    int n, sum = 0;
    cin >> n;

    for(int i = 1; i <= n; ++i){
        cin >> a[i];
        sum += a[i];
    }

    dp[0] = 1;

    for(int i = 1; i <= n; ++i){
        for(int j = sum; j >= a[i]; --j){
            dp[j] += dp[j - a[i]];
        }
    }

    if (sum & 1 || !dp[sum / 2]) cout << "0\n";
    else {

        for(int i = 1; i <= n; ++i){

            for(int j = a[i]; j <= sum; ++j){
                dp[j] -= dp[j - a[i]];
            }

            for(int j = 0; j * 2 <= (sum - a[i]); ++j){
                if(!dp[j]) continue;
                freq[sum - a[i] - j * 2] += 1;
            }


            for(int j = sum; j >= a[i]; --j){
                dp[j] += dp[j - a[i]];
            }

        }

        vector<int> ans;

        for(int i = 1; i < mxN; ++i){
            if(freq[i] == n) ans.push_back(i);
        }

        cout << (int) ans.size() << "\n";

        for(auto it : ans){
            cout << it << " ";
        }

    }



    return 0;
}

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 21 / 21
• Subtask 6: 35 / 35