Submission #37417

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
37417	2017-12-25T09:05:35 Z	HardNut	Bootfall (IZhO17_bootfall)	C++14	13 / 100	169 ms	68880 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[105], dp1[105][50005], dp2[105][50005], sum;
vector<int> ans, vec;
int dp[105][50005];
bool us[105][50005];
bool used[50005];

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	68880 KB	Output is correct
2	Correct	68880 KB	Output is correct
3	Correct	68880 KB	Output is correct
4	Correct	68880 KB	Output is correct
5	Correct	68880 KB	Output is correct
6	Correct	68880 KB	Output is correct
7	Correct	68880 KB	Output is correct
8	Correct	68880 KB	Output is correct
9	Correct	68880 KB	Output is correct

Subtask #2
7.0 / 7.0

#	Verdict	Memory	Grader output
1	Correct	68880 KB	Output is correct
2	Correct	68880 KB	Output is correct
3	Correct	68880 KB	Output is correct
4	Correct	68880 KB	Output is correct
5	Correct	68880 KB	Output is correct
6	Correct	68880 KB	Output is correct
7	Correct	68880 KB	Output is correct
8	Correct	68880 KB	Output is correct
9	Correct	68880 KB	Output is correct
10	Correct	68880 KB	Output is correct
11	Correct	68880 KB	Output is correct
12	Correct	68880 KB	Output is correct
13	Correct	68880 KB	Output is correct
14	Correct	68880 KB	Output is correct
15	Correct	68880 KB	Output is correct
16	Correct	68880 KB	Output is correct
17	Correct	68880 KB	Output is correct
18	Correct	68880 KB	Output is correct
19	Correct	68880 KB	Output is correct
20	Correct	68880 KB	Output is correct

Subtask #3
0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	68880 KB	Output is correct
2	Correct	0 ms	68880 KB	Output is correct
3	Correct	0 ms	68880 KB	Output is correct
4	Correct	0 ms	68880 KB	Output is correct
5	Correct	0 ms	68880 KB	Output is correct
6	Correct	0 ms	68880 KB	Output is correct
7	Correct	0 ms	68880 KB	Output is correct
8	Correct	0 ms	68880 KB	Output is correct
9	Correct	0 ms	68880 KB	Output is correct
10	Correct	0 ms	68880 KB	Output is correct
11	Correct	0 ms	68880 KB	Output is correct
12	Correct	0 ms	68880 KB	Output is correct
13	Correct	0 ms	68880 KB	Output is correct
14	Correct	0 ms	68880 KB	Output is correct
15	Correct	0 ms	68880 KB	Output is correct
16	Correct	0 ms	68880 KB	Output is correct
17	Correct	0 ms	68880 KB	Output is correct
18	Correct	0 ms	68880 KB	Output is correct
19	Correct	0 ms	68880 KB	Output is correct
20	Correct	0 ms	68880 KB	Output is correct
21	Correct	49 ms	68880 KB	Output is correct
22	Correct	73 ms	68880 KB	Output is correct
23	Correct	23 ms	68880 KB	Output is correct
24	Runtime error	169 ms	68880 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	68880 KB	Output is correct
2	Correct	0 ms	68880 KB	Output is correct
3	Correct	0 ms	68880 KB	Output is correct
4	Correct	0 ms	68880 KB	Output is correct
5	Correct	0 ms	68880 KB	Output is correct
6	Correct	0 ms	68880 KB	Output is correct
7	Correct	0 ms	68880 KB	Output is correct
8	Correct	0 ms	68880 KB	Output is correct
9	Correct	0 ms	68880 KB	Output is correct
10	Correct	0 ms	68880 KB	Output is correct
11	Correct	0 ms	68880 KB	Output is correct
12	Correct	0 ms	68880 KB	Output is correct
13	Correct	0 ms	68880 KB	Output is correct
14	Correct	0 ms	68880 KB	Output is correct
15	Correct	0 ms	68880 KB	Output is correct
16	Correct	0 ms	68880 KB	Output is correct
17	Correct	0 ms	68880 KB	Output is correct
18	Correct	0 ms	68880 KB	Output is correct
19	Correct	0 ms	68880 KB	Output is correct
20	Correct	0 ms	68880 KB	Output is correct
21	Correct	49 ms	68880 KB	Output is correct
22	Correct	73 ms	68880 KB	Output is correct
23	Correct	23 ms	68880 KB	Output is correct
24	Runtime error	169 ms	68880 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	68880 KB	Output is correct
2	Correct	0 ms	68880 KB	Output is correct
3	Correct	0 ms	68880 KB	Output is correct
4	Correct	0 ms	68880 KB	Output is correct
5	Correct	0 ms	68880 KB	Output is correct
6	Correct	0 ms	68880 KB	Output is correct
7	Correct	0 ms	68880 KB	Output is correct
8	Correct	0 ms	68880 KB	Output is correct
9	Correct	0 ms	68880 KB	Output is correct
10	Correct	0 ms	68880 KB	Output is correct
11	Correct	0 ms	68880 KB	Output is correct
12	Correct	0 ms	68880 KB	Output is correct
13	Correct	0 ms	68880 KB	Output is correct
14	Correct	0 ms	68880 KB	Output is correct
15	Correct	0 ms	68880 KB	Output is correct
16	Correct	0 ms	68880 KB	Output is correct
17	Correct	0 ms	68880 KB	Output is correct
18	Correct	0 ms	68880 KB	Output is correct
19	Correct	0 ms	68880 KB	Output is correct
20	Correct	0 ms	68880 KB	Output is correct
21	Correct	49 ms	68880 KB	Output is correct
22	Correct	73 ms	68880 KB	Output is correct
23	Correct	23 ms	68880 KB	Output is correct
24	Runtime error	169 ms	68880 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	68880 KB	Output is correct
2	Correct	0 ms	68880 KB	Output is correct
3	Correct	0 ms	68880 KB	Output is correct
4	Correct	0 ms	68880 KB	Output is correct
5	Correct	0 ms	68880 KB	Output is correct
6	Correct	0 ms	68880 KB	Output is correct
7	Correct	0 ms	68880 KB	Output is correct
8	Correct	0 ms	68880 KB	Output is correct
9	Correct	0 ms	68880 KB	Output is correct
10	Correct	0 ms	68880 KB	Output is correct
11	Correct	0 ms	68880 KB	Output is correct
12	Correct	0 ms	68880 KB	Output is correct
13	Correct	0 ms	68880 KB	Output is correct
14	Correct	0 ms	68880 KB	Output is correct
15	Correct	0 ms	68880 KB	Output is correct
16	Correct	0 ms	68880 KB	Output is correct
17	Correct	0 ms	68880 KB	Output is correct
18	Correct	0 ms	68880 KB	Output is correct
19	Correct	0 ms	68880 KB	Output is correct
20	Correct	0 ms	68880 KB	Output is correct
21	Correct	49 ms	68880 KB	Output is correct
22	Correct	73 ms	68880 KB	Output is correct
23	Correct	23 ms	68880 KB	Output is correct
24	Runtime error	169 ms	68880 KB	Execution killed because of forbidden syscall writev (20)
25	Halted	0 ms	0 KB	-

Submission #37417

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