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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#72847#4837. Ramenckiseki#WA 6ms15716kbC++203.4kb2023-01-19 17:44:052023-01-19 17:44:06

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-01-19 17:44:06]
  • 评测
  • 测评结果:WA
  • 用时:6ms
  • 内存:15716kb
  • [2023-01-19 17:44:05]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

const int maxn = 300025;
struct Fenwick {
    int b[maxn];
    int query(int l, int r) {
        return query(r - 1) - query(l - 1);
    }
    void add(int p, int v) {
        for (++p; p < maxn; p += p & -p)
            b[p] += v;
    }
    int query(int p) {
        int r = 0;
        for (++p; p < maxn; p += p & -p)
            r += b[p];
        return r;
    }
} BIT;

vector<int> g[maxn];
int pa[maxn][20], in[maxn], out[maxn];
int dep[maxn];
int tot;

void dfs(int i, int f) {
    in[i] = tot++;
    pa[i][0] = f;
    for (int l = 0; l + 1 < 20; l++)
        pa[i][l + 1] = pa[pa[i][l]][l];
    for (int j: g[i]) {
        if (j == f) continue;
        dep[j] = dep[i] + 1;
        dfs(j, i);
    }
    out[i] = tot;
}

int tmp[maxn];
int64_t pre[maxn];

int LCA(int x, int y) {
    if (dep[x] < dep[y]) swap(x, y);
    int d = dep[x] - dep[y];
    for (int i = 0; i < 20; i++)
        if (d >> i & 1)
            x = pa[x][i];
    if (x == y) return x;
    for (int i = 19; i >= 0; i--)
        if (pa[x][i] != pa[y][i])
            x = pa[x][i], y = pa[y][i];
    return pa[x][0];
}

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);

    int n;
    cin >> n;

    for (int i = 1; i < n; i++) {
        int u, v;
        cin >> u >> v;
        g[u].emplace_back(v);
        g[v].emplace_back(u);
    }

    dfs(1, 0);

    cerr << "in, out = \n";
    for (int i = 1; i <= n; i++) {
        cerr << in[i] << ' ' << out[i] << endl;
    }
    cerr << endl;

    vector<tuple<int,int,int>> evt;
    // evt.reserve(n * (log(n) + 2));
    for (int x = 1; x <= n; x++) {
        for (int y = 1; x * y <= n && y < x; y++) {
            evt.emplace_back(x * y, x, y);
        }
    }

    for (int z = 1; z <= n; z++) {
        evt.emplace_back(z, -1, -1);
    }

    sort(evt.begin(), evt.end());

    for (const auto &[A, B, C]: evt) {
        if (B == -1 && C == -1) {
            int z = A;
            int sum = 0;
            for (int j: g[z]) {
                if (j == pa[z][0]) continue;
                cerr << "query " << j << endl;
                tmp[j] = BIT.query(in[j], out[j]);
                cerr << "tmp[j] = " << tmp[j] << endl;
                sum += tmp[j];
            }
            for (int j: g[z]) {
                if (j == pa[z][0]) continue;
                int add = sum - tmp[j];
                pre[in[j]] += add;
                pre[out[j]] -= add;
            }
            {
                int add = sum;
                pre[in[z]] += add;
                pre[in[z] + 1] -= add;
            }
        } else {
            int x = B;
            int y = C;
            int l = LCA(x, y);

            cerr << "x, y = " << x << ", " << y << endl;
            cerr << "l = " << l << endl;

            BIT.add(in[x], 1);
            BIT.add(in[y], 1);
            BIT.add(in[l], -2);

            if (l > x * y) {
                pre[0] += 1;
                pre[in[l]] -= 1;
                pre[out[l]] += 1;
                pre[tot] -= 1;
            }
        }
    }

    for (int i = 1; i < tot; i++)
        pre[i] += pre[i - 1];

    for (int i = 1; i <= n; i++)
        cout << 1LL * n * (n + 1) / 2 - pre[in[i]] << '\n';

    return 0;
}

/*
5
1 2
4 2
2 5
3 5
in, out = 
0 5
1 5
4 5
2 3
3 5

query 2
tmp[j] = 0
query 4
tmp[j] = 0
query 5
tmp[j] = 0
x, y = 2, 1
l = 1
x, y = 3, 1
l = 1
x, y = 4, 1
l = 1
query 3
tmp[j] = 3
x, y = 5, 1
l = 1
15
15
15
15
12

*/

详细

Test #1:

score: 0
Wrong Answer
time: 6ms
memory: 15716kb

input:

3
1 2 -5

output:

6
6
6

result:

wrong output format YES or NO expected, but 6 found