Submission #37416

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
37416	2017-12-25T09:01:48 Z	HardNut	Bootfall (IZhO17_bootfall)	C++14	13 / 100	169 ms	28864 KB

bootfall

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<vector>

using namespace std;

const int N = 1e5 + 5;

typedef long long ll;

int n, a[505], dp1[105][20005], dp2[105][20005], sum;
vector<int> ans, vec;
int dp[105][20005];
bool us[105][20005];
bool used[20005];

bool is(int s, int v) {
    if (us[v][s])
        return dp[v][s];
    us[v][s] = 1;
    for (int i = 0; i <= s; i++) {
        if ((dp1[v - 1][i] && dp2[v + 1][s - i]) || (dp2[v + 1][i] && dp1[v - 1][s - i])) {
            dp[v][s] = 1;
            return 1;
        }
    }
    dp[v][s] = 0;
    return 0;
}

int main() {
//    freopen("bootfall.in", "r", stdin);
//    freopen("bootfall.out", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        dp[i][0] = 1;
        cin >> a[i];
        sum += a[i];
    }
    if (sum % 2 == 1) {
        cout << 0;
        return 0;
    }
    bool u = 0;
    dp1[0][0] = 1;
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= sum; j++) {
            if (dp1[i - 1][j]) {
                if (j + a[i] == sum / 2)
                    u = 1;
                dp1[i][j + a[i]] = 1;
                dp1[i][j] = 1;
                dp[i][j + a[i]] = 1;
            }
        }
    }
    if (u == 0) {
        cout << 0;
        return 0;
    }
    dp2[n + 1][0] = 1;
    for (int i = n; i >= 1; i--) {
        for (int j = 0; j <= sum; j++) {
            if (dp2[i + 1][j]) {
                dp2[i][j + a[i]] = 1;
                dp2[i][j] = 1;
                dp[i][j + a[i]] = 1;
            }
        }
    }
    for (int i = 0; i <= sum; i++) {
        if (dp1[n - 1][i])
            vec.push_back(i);
    }
    for (int i : vec) {
        int x = abs(i - (sum - a[n] - i));
        bool u = 0;
        for (int j = 1; j <= n; j++) {
            if ((sum - a[j] + x) % 2) {
                u = 1;
                break;
            }
            if (!is((sum - a[j] + x) / 2, j)) {
                u = 1;
                break;
            }
        }
        if (!u) {
            if (!used[x]) {
                ans.push_back(x);
                used[x] = 1;
            }
        }
    }
    cout << ans.size() << "\n";
    for (int i = ans.size() - 1; i >= 0; i--)
        cout << ans[i] << " ";
}

Subtask #1
6.0 / 6.0

#	Verdict	Memory	Grader output
1	Correct	28864 KB	Output is correct
2	Correct	28864 KB	Output is correct
3	Correct	28864 KB	Output is correct
4	Correct	28864 KB	Output is correct
5	Correct	28864 KB	Output is correct
6	Correct	28864 KB	Output is correct
7	Correct	28864 KB	Output is correct
8	Correct	28864 KB	Output is correct
9	Correct	28864 KB	Output is correct

Subtask #2
7.0 / 7.0

#	Verdict	Memory	Grader output
1	Correct	28864 KB	Output is correct
2	Correct	28864 KB	Output is correct
3	Correct	28864 KB	Output is correct
4	Correct	28864 KB	Output is correct
5	Correct	28864 KB	Output is correct
6	Correct	28864 KB	Output is correct
7	Correct	28864 KB	Output is correct
8	Correct	28864 KB	Output is correct
9	Correct	28864 KB	Output is correct
10	Correct	28864 KB	Output is correct
11	Correct	28864 KB	Output is correct
12	Correct	28864 KB	Output is correct
13	Correct	28864 KB	Output is correct
14	Correct	28864 KB	Output is correct
15	Correct	28864 KB	Output is correct
16	Correct	28864 KB	Output is correct
17	Correct	28864 KB	Output is correct
18	Correct	28864 KB	Output is correct
19	Correct	28864 KB	Output is correct
20	Correct	28864 KB	Output is correct

Subtask #3
0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	28864 KB	Output is correct
2	Correct	0 ms	28864 KB	Output is correct
3	Correct	0 ms	28864 KB	Output is correct
4	Correct	0 ms	28864 KB	Output is correct
5	Correct	0 ms	28864 KB	Output is correct
6	Correct	0 ms	28864 KB	Output is correct
7	Correct	0 ms	28864 KB	Output is correct
8	Correct	0 ms	28864 KB	Output is correct
9	Correct	0 ms	28864 KB	Output is correct
10	Correct	0 ms	28864 KB	Output is correct
11	Correct	0 ms	28864 KB	Output is correct
12	Correct	0 ms	28864 KB	Output is correct
13	Correct	0 ms	28864 KB	Output is correct
14	Correct	0 ms	28864 KB	Output is correct
15	Correct	0 ms	28864 KB	Output is correct
16	Correct	0 ms	28864 KB	Output is correct
17	Correct	0 ms	28864 KB	Output is correct
18	Correct	0 ms	28864 KB	Output is correct
19	Correct	0 ms	28864 KB	Output is correct
20	Correct	0 ms	28864 KB	Output is correct
21	Correct	46 ms	28864 KB	Output is correct
22	Correct	66 ms	28864 KB	Output is correct
23	Correct	23 ms	28864 KB	Output is correct
24	Runtime error	169 ms	28864 KB	Execution killed because of forbidden syscall writev (20)
25	Halted	0 ms	0 KB	-

Subtask #4
0 / 16.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	28864 KB	Output is correct
2	Correct	0 ms	28864 KB	Output is correct
3	Correct	0 ms	28864 KB	Output is correct
4	Correct	0 ms	28864 KB	Output is correct
5	Correct	0 ms	28864 KB	Output is correct
6	Correct	0 ms	28864 KB	Output is correct
7	Correct	0 ms	28864 KB	Output is correct
8	Correct	0 ms	28864 KB	Output is correct
9	Correct	0 ms	28864 KB	Output is correct
10	Correct	0 ms	28864 KB	Output is correct
11	Correct	0 ms	28864 KB	Output is correct
12	Correct	0 ms	28864 KB	Output is correct
13	Correct	0 ms	28864 KB	Output is correct
14	Correct	0 ms	28864 KB	Output is correct
15	Correct	0 ms	28864 KB	Output is correct
16	Correct	0 ms	28864 KB	Output is correct
17	Correct	0 ms	28864 KB	Output is correct
18	Correct	0 ms	28864 KB	Output is correct
19	Correct	0 ms	28864 KB	Output is correct
20	Correct	0 ms	28864 KB	Output is correct
21	Correct	46 ms	28864 KB	Output is correct
22	Correct	66 ms	28864 KB	Output is correct
23	Correct	23 ms	28864 KB	Output is correct
24	Runtime error	169 ms	28864 KB	Execution killed because of forbidden syscall writev (20)
25	Halted	0 ms	0 KB	-

Subtask #5
0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	28864 KB	Output is correct
2	Correct	0 ms	28864 KB	Output is correct
3	Correct	0 ms	28864 KB	Output is correct
4	Correct	0 ms	28864 KB	Output is correct
5	Correct	0 ms	28864 KB	Output is correct
6	Correct	0 ms	28864 KB	Output is correct
7	Correct	0 ms	28864 KB	Output is correct
8	Correct	0 ms	28864 KB	Output is correct
9	Correct	0 ms	28864 KB	Output is correct
10	Correct	0 ms	28864 KB	Output is correct
11	Correct	0 ms	28864 KB	Output is correct
12	Correct	0 ms	28864 KB	Output is correct
13	Correct	0 ms	28864 KB	Output is correct
14	Correct	0 ms	28864 KB	Output is correct
15	Correct	0 ms	28864 KB	Output is correct
16	Correct	0 ms	28864 KB	Output is correct
17	Correct	0 ms	28864 KB	Output is correct
18	Correct	0 ms	28864 KB	Output is correct
19	Correct	0 ms	28864 KB	Output is correct
20	Correct	0 ms	28864 KB	Output is correct
21	Correct	46 ms	28864 KB	Output is correct
22	Correct	66 ms	28864 KB	Output is correct
23	Correct	23 ms	28864 KB	Output is correct
24	Runtime error	169 ms	28864 KB	Execution killed because of forbidden syscall writev (20)
25	Halted	0 ms	0 KB	-

Subtask #6
0 / 35.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	28864 KB	Output is correct
2	Correct	0 ms	28864 KB	Output is correct
3	Correct	0 ms	28864 KB	Output is correct
4	Correct	0 ms	28864 KB	Output is correct
5	Correct	0 ms	28864 KB	Output is correct
6	Correct	0 ms	28864 KB	Output is correct
7	Correct	0 ms	28864 KB	Output is correct
8	Correct	0 ms	28864 KB	Output is correct
9	Correct	0 ms	28864 KB	Output is correct
10	Correct	0 ms	28864 KB	Output is correct
11	Correct	0 ms	28864 KB	Output is correct
12	Correct	0 ms	28864 KB	Output is correct
13	Correct	0 ms	28864 KB	Output is correct
14	Correct	0 ms	28864 KB	Output is correct
15	Correct	0 ms	28864 KB	Output is correct
16	Correct	0 ms	28864 KB	Output is correct
17	Correct	0 ms	28864 KB	Output is correct
18	Correct	0 ms	28864 KB	Output is correct
19	Correct	0 ms	28864 KB	Output is correct
20	Correct	0 ms	28864 KB	Output is correct
21	Correct	46 ms	28864 KB	Output is correct
22	Correct	66 ms	28864 KB	Output is correct
23	Correct	23 ms	28864 KB	Output is correct
24	Runtime error	169 ms	28864 KB	Execution killed because of forbidden syscall writev (20)
25	Halted	0 ms	0 KB	-

Submission #37416

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 7.0 / 7.0

Subtask #3 0 / 15.0

Subtask #4 0 / 16.0

Subtask #5 0 / 21.0

Subtask #6 0 / 35.0

Subtask #1
6.0 / 6.0

Subtask #2
7.0 / 7.0

Subtask #3
0 / 15.0

Subtask #4
0 / 16.0

Subtask #5
0 / 21.0

Subtask #6
0 / 35.0