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
#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] << " ";
}
# 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
# 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
# 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 -
# 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 -
# 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 -
# 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 -