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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#287979#4815. Flower's Landzzy0922RE 0ms0kbC++142.7kb2023-12-21 13:44:292023-12-21 13:44:30

Judging History

你现在查看的是最新测评结果

  • [2023-12-21 13:44:30]
  • 评测
  • 测评结果:RE
  • 用时:0ms
  • 内存:0kb
  • [2023-12-21 13:44:29]
  • 提交

answer

#include <bits/stdc++.h>

inline void chkmax(int &x, const int &v) {
    x = std::max(x, v);
} 

const int N = 40005;

int n, k;
int a[N];
std::vector<int> t[N];

bool vis[N];
int rt;
int siz[N], mn, sum;

void calc_siz(int u, int f) {
    siz[u] = 1;
    int msiz = 0;
    for (const int &v : t[u]) {
        if (v == f || vis[f]) continue;
        calc_siz(v, u);
        msiz = std::max(msiz, siz[v]); 
        siz[u] += siz[v]; 
    }
    msiz = std::max(msiz, sum - siz[u]);
    if (msiz < mn) {
        rt = u;
        mn = msiz;
    }
}

void get_rt(int u) {
    sum = siz[u];
    mn = n;
    calc_siz(u, -1);
    calc_siz(rt, -1);
}

int tot, dfn[N], rnk[N];

void get_dfn(int u, int f) {
    dfn[u] = ++tot;
    rnk[tot] = u;
    for (const int &v : t[u]) {
        if (v == f || vis[v]) continue;
        get_dfn(v, u);
    }
}

int f[N][3005], g[N][3005];
int ans[N];
void dfz(int u) {
    tot = 0;
    get_dfn(u, -1);    
    // memset(f, 0, sizeof f);
    // memset(g, 0, sizeof g);
    // std::cout << "\n\n";
    // for (int i = 1; i <= tot; i++) std::cout << rnk[i] << ' ' << siz[rnk[i]] << '\n';
    // std::cout << "\n\n";
    for (int i = 0; i <= tot + 1; i++){
        memset(f[i], 0xcf, sizeof(f[i]));
        memset(g[i], 0xcf, sizeof(g[i]));
    }
    f[1][0] = 0;
    for (int i = 1; i <= tot; i++) {
        for (int j = 0; j < k; j++)
            chkmax(f[i + 1][j + 1], f[i][j] + a[rnk[i]]);
    
        for (int j = 0; j <= k; j++)
            chkmax(f[i + siz[rnk[i]]][j], f[i][j]);
    }

    g[tot][0] = 0;
    for (int i = tot - 1; i >= 1; i--) {
        for (int j = 1; j <= k; j++)
            chkmax(g[i][j], g[i + 1][j - 1] + a[rnk[i + 1]]);

        for (int j = 0; j <= k; j++) 
            chkmax(g[i][j], g[i + siz[rnk[i + 1]]][j]);
    }
    for (int i = 1; i <= tot; i++) 
        for (int j = 0; j <= k - 1; j++) 
            chkmax(ans[rnk[i]], f[i][j] + g[i][k - 1 - j] + a[rnk[i]]);
    
    // std::cout << u << '\n';
    // for (int i = 1; i <= n; i++) std::cout << ans[i] << ' ';
    // std::cout << '\n';
    // exit(0);
    vis[u] = 1;
    for (const int &v : t[u]) {
        if (vis[v]) continue;
        get_rt(v);
        dfz(rt);
    }
}

int main() {
    std::cin.tie(0)->sync_with_stdio(0);
    std::cin >> n >> k;
    for (int i = 1; i <= n; i++) std::cin >> a[i];
    for (int i = 1, x, y; i <= n - 1; i++) {
        std::cin >> x >> y;
        t[x].push_back(y);
        t[y].push_back(x);
    }
    sum = n;
    mn = n;
    calc_siz(1, -1);
    calc_siz(rt, -1);
    dfz(rt);
    for (int i = 1; i <= n; i++) std::cout << ans[i] << ' ';
    std::cout << '\n';
    return 0;
}

Details

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Test #1:

score: 0
Runtime Error

input:

5 3
6 10 4 3 4
3 4
4 2
2 5
5 1

output:


result: