Submission #172872

#	Time	Username	Problem	Language	Result	Execution time	Memory
172872		VEGAnn	Bootfall (IZhO17_bootfall)	C++14	28 / 100	1070 ms	672 KiB

bootfall

#include <bits/stdc++.h>
#define sz(x) ((int)x.size())
#define PB push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int N = 273;
const int N2 = N * N;
const int PW = 20;
const int oo = 2e9;
bitset<N2 * 2> f[2], cle, full;
vector<int> vc;
int n, a[N], ed;

void calc(){
    ed = 0;
    f[0] = cle;
    f[0][N2] = 1;
    for (int i = 0; i < sz(vc); i++){
        ed ^= 1;
        int cr = a[vc[i]];
        f[ed] = (f[ed ^ 1] >> cr) | (f[ed ^ 1] << cr);
    }
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
//    freopen("in.txt","r",stdin);
    vc.clear();

    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        vc.PB(i);
    }
    calc();
    if (f[ed][N2] == 0){
        cout << 0;
        return 0;
    }

    for (int i = 0; i < N2 + N2; i++)
        full[i] = 1;

    for (int i = 0; i < n; i++){
        vc.clear();
        for (int j = 0; j < n; j++)
            if (j != i)
                vc.PB(j);
        calc();

        full &= f[ed];
    }

    vc.clear();
    for (int i = 1; i < N2; i++)
        if (full[N2 + i])
            vc.PB(i);

    cout << sz(vc) << '\n';
    for (int x : vc)
        cout << x << '\n';
    return 0;
}

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35