Submission #37418

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
37418	2017-12-25T09:10:21 Z	HardNut	Bootfall (IZhO17_bootfall)	C++14	13 / 100	153 ms	132364 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[205], dp1[205][50005], dp2[205][50005], sum;
vector<int> ans, vec;
int dp[205][50005];
bool us[205][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	132364 KB	Output is correct
2	Correct	132364 KB	Output is correct
3	Correct	132364 KB	Output is correct
4	Correct	132364 KB	Output is correct
5	Correct	132364 KB	Output is correct
6	Correct	132364 KB	Output is correct
7	Correct	132364 KB	Output is correct
8	Correct	132364 KB	Output is correct
9	Correct	132364 KB	Output is correct

Subtask #2
7.0 / 7.0

#	Verdict	Memory	Grader output
1	Correct	132364 KB	Output is correct
2	Correct	132364 KB	Output is correct
3	Correct	132364 KB	Output is correct
4	Correct	132364 KB	Output is correct
5	Correct	132364 KB	Output is correct
6	Correct	132364 KB	Output is correct
7	Correct	132364 KB	Output is correct
8	Correct	132364 KB	Output is correct
9	Correct	132364 KB	Output is correct
10	Correct	132364 KB	Output is correct
11	Correct	132364 KB	Output is correct
12	Correct	132364 KB	Output is correct
13	Correct	132364 KB	Output is correct
14	Correct	132364 KB	Output is correct
15	Correct	132364 KB	Output is correct
16	Correct	132364 KB	Output is correct
17	Correct	132364 KB	Output is correct
18	Correct	132364 KB	Output is correct
19	Correct	132364 KB	Output is correct
20	Correct	132364 KB	Output is correct

Subtask #3
0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	132364 KB	Output is correct
2	Correct	0 ms	132364 KB	Output is correct
3	Correct	0 ms	132364 KB	Output is correct
4	Correct	0 ms	132364 KB	Output is correct
5	Correct	0 ms	132364 KB	Output is correct
6	Correct	0 ms	132364 KB	Output is correct
7	Correct	0 ms	132364 KB	Output is correct
8	Correct	0 ms	132364 KB	Output is correct
9	Correct	0 ms	132364 KB	Output is correct
10	Correct	0 ms	132364 KB	Output is correct
11	Correct	0 ms	132364 KB	Output is correct
12	Correct	0 ms	132364 KB	Output is correct
13	Correct	0 ms	132364 KB	Output is correct
14	Correct	0 ms	132364 KB	Output is correct
15	Correct	0 ms	132364 KB	Output is correct
16	Correct	0 ms	132364 KB	Output is correct
17	Correct	0 ms	132364 KB	Output is correct
18	Correct	0 ms	132364 KB	Output is correct
19	Correct	0 ms	132364 KB	Output is correct
20	Correct	0 ms	132364 KB	Output is correct
21	Correct	43 ms	132364 KB	Output is correct
22	Correct	69 ms	132364 KB	Output is correct
23	Correct	19 ms	132364 KB	Output is correct
24	Runtime error	153 ms	132364 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	132364 KB	Output is correct
2	Correct	0 ms	132364 KB	Output is correct
3	Correct	0 ms	132364 KB	Output is correct
4	Correct	0 ms	132364 KB	Output is correct
5	Correct	0 ms	132364 KB	Output is correct
6	Correct	0 ms	132364 KB	Output is correct
7	Correct	0 ms	132364 KB	Output is correct
8	Correct	0 ms	132364 KB	Output is correct
9	Correct	0 ms	132364 KB	Output is correct
10	Correct	0 ms	132364 KB	Output is correct
11	Correct	0 ms	132364 KB	Output is correct
12	Correct	0 ms	132364 KB	Output is correct
13	Correct	0 ms	132364 KB	Output is correct
14	Correct	0 ms	132364 KB	Output is correct
15	Correct	0 ms	132364 KB	Output is correct
16	Correct	0 ms	132364 KB	Output is correct
17	Correct	0 ms	132364 KB	Output is correct
18	Correct	0 ms	132364 KB	Output is correct
19	Correct	0 ms	132364 KB	Output is correct
20	Correct	0 ms	132364 KB	Output is correct
21	Correct	43 ms	132364 KB	Output is correct
22	Correct	69 ms	132364 KB	Output is correct
23	Correct	19 ms	132364 KB	Output is correct
24	Runtime error	153 ms	132364 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	132364 KB	Output is correct
2	Correct	0 ms	132364 KB	Output is correct
3	Correct	0 ms	132364 KB	Output is correct
4	Correct	0 ms	132364 KB	Output is correct
5	Correct	0 ms	132364 KB	Output is correct
6	Correct	0 ms	132364 KB	Output is correct
7	Correct	0 ms	132364 KB	Output is correct
8	Correct	0 ms	132364 KB	Output is correct
9	Correct	0 ms	132364 KB	Output is correct
10	Correct	0 ms	132364 KB	Output is correct
11	Correct	0 ms	132364 KB	Output is correct
12	Correct	0 ms	132364 KB	Output is correct
13	Correct	0 ms	132364 KB	Output is correct
14	Correct	0 ms	132364 KB	Output is correct
15	Correct	0 ms	132364 KB	Output is correct
16	Correct	0 ms	132364 KB	Output is correct
17	Correct	0 ms	132364 KB	Output is correct
18	Correct	0 ms	132364 KB	Output is correct
19	Correct	0 ms	132364 KB	Output is correct
20	Correct	0 ms	132364 KB	Output is correct
21	Correct	43 ms	132364 KB	Output is correct
22	Correct	69 ms	132364 KB	Output is correct
23	Correct	19 ms	132364 KB	Output is correct
24	Runtime error	153 ms	132364 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	132364 KB	Output is correct
2	Correct	0 ms	132364 KB	Output is correct
3	Correct	0 ms	132364 KB	Output is correct
4	Correct	0 ms	132364 KB	Output is correct
5	Correct	0 ms	132364 KB	Output is correct
6	Correct	0 ms	132364 KB	Output is correct
7	Correct	0 ms	132364 KB	Output is correct
8	Correct	0 ms	132364 KB	Output is correct
9	Correct	0 ms	132364 KB	Output is correct
10	Correct	0 ms	132364 KB	Output is correct
11	Correct	0 ms	132364 KB	Output is correct
12	Correct	0 ms	132364 KB	Output is correct
13	Correct	0 ms	132364 KB	Output is correct
14	Correct	0 ms	132364 KB	Output is correct
15	Correct	0 ms	132364 KB	Output is correct
16	Correct	0 ms	132364 KB	Output is correct
17	Correct	0 ms	132364 KB	Output is correct
18	Correct	0 ms	132364 KB	Output is correct
19	Correct	0 ms	132364 KB	Output is correct
20	Correct	0 ms	132364 KB	Output is correct
21	Correct	43 ms	132364 KB	Output is correct
22	Correct	69 ms	132364 KB	Output is correct
23	Correct	19 ms	132364 KB	Output is correct
24	Runtime error	153 ms	132364 KB	Execution killed because of forbidden syscall writev (20)
25	Halted	0 ms	0 KB	-

Submission #37418

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