oj.uz

답안 #1004761

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1004761 2024-06-21T14:03:26 Z tvladm2009 Chase (CEOI17_chase) C++17
100 / 100
 156 ms 165288 KB 
// https://oj.uz/submission/945337
#include <iostream> // am dat o simulare pe vjudge mai demult si am bagat pb asta, o urc si pe main
#include <complex>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <numeric>
#include <cstring>
#include <ctime>
#include <cstdlib>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <list>
#include <cmath>
#include <bitset>
#include <cassert>
#include <queue>
#include <stack>
#include <deque>
#include <random>
 
using namespace std;
template<typename T1, typename T2> inline void chkmin(T1 &a, T2 b) {if (a > b) a = b;}
template<typename T1, typename T2> inline void chkmax(T1 &a, T2 b) {if (a < b) a = b;}
#define files(FILENAME) read(FILENAME); write(FILENAME)
#define read(FILENAME) freopen((FILENAME + ".in").c_str(), "r", stdin)
#define write(FILENAME) freopen((FILENAME + ".out").c_str(), "w", stdout)
#define all(c) (c).begin(), (c).end()
#define sz(c) (int)(c).size()
#define left left228
#define right right228
#define y1 y1228
#define mp make_pair
#define pb push_back
#define y2 y2228
#define rank rank228
using ll = long long;
using ld = long double; 
const string FILENAME = "input";
const int MAXN = 100228;
const int MAXV = 100 + 7;
 
int n, k, a[MAXN];
vector<int> g[MAXN];
ll dp1[MAXN][MAXV], dp2[MAXN][MAXV];
ll res = 0;
 
void dfs(int u, int p = 0) {
    ll s = 0;
    for (auto h: g[u]) {
        s += a[h];
    }
    vector<int> kids;
    dp2[u][1] = s;
    for (auto h: g[u]) {
        if (h == p) {
            continue;
        }
        kids.pb(h);
        dfs(h, u);
        for (int i = 1; i <= k; i++) {
            chkmax(res, dp2[u][i] + dp1[h][k - i]);
        }
        for (int i = 1; i <= k; i++) {
            chkmax(dp1[u][i], max(dp1[h][i], dp1[h][i - 1] + s - a[p]));
            chkmax(dp2[u][i], max(dp2[h][i], dp2[h][i - 1] + s - a[h]));
        }
    }
    for (int i = 1; i <= k; i++) {
        dp2[u][i] = 0;
    }
    dp2[u][1] = s;
    reverse(all(kids));
    for (auto h: kids) {
        for (int i = 1; i <= k; i++) {
            chkmax(res, dp2[u][i] + dp1[h][k - i]);
        }
        for (int i = 1; i <= k; i++) {
            chkmax(dp2[u][i], max(dp2[h][i], dp2[h][i - 1] + s - a[h]));
        }
    }
}
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    //read(FILENAME);
    cin >> n >> k;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    for (int i = 1; i < n; i++) {
        int u, v;
        cin >> u >> v;
        g[u].pb(v);
        g[v].pb(u);
    }
    dfs(1);
    cout << res << '\n';
    return 0;
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 2 ms 7256 KB Output is correct
8 Correct 1 ms 7260 KB Output is correct
9 Correct 2 ms 6748 KB Output is correct
10 Correct 2 ms 7432 KB Output is correct
11 Correct 2 ms 7516 KB Output is correct
12 Correct 2 ms 7400 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 126 ms 145744 KB Output is correct
2 Correct 123 ms 145640 KB Output is correct
3 Correct 105 ms 94992 KB Output is correct
4 Correct 88 ms 162896 KB Output is correct
5 Correct 156 ms 165288 KB Output is correct
6 Correct 152 ms 164944 KB Output is correct
7 Correct 156 ms 165200 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 2 ms 7256 KB Output is correct
8 Correct 1 ms 7260 KB Output is correct
9 Correct 2 ms 6748 KB Output is correct
10 Correct 2 ms 7432 KB Output is correct
11 Correct 2 ms 7516 KB Output is correct
12 Correct 2 ms 7400 KB Output is correct
13 Correct 126 ms 145744 KB Output is correct
14 Correct 123 ms 145640 KB Output is correct
15 Correct 105 ms 94992 KB Output is correct
16 Correct 88 ms 162896 KB Output is correct
17 Correct 156 ms 165288 KB Output is correct
18 Correct 152 ms 164944 KB Output is correct
19 Correct 156 ms 165200 KB Output is correct
20 Correct 151 ms 165200 KB Output is correct
21 Correct 52 ms 94292 KB Output is correct
22 Correct 154 ms 164800 KB Output is correct
23 Correct 91 ms 162984 KB Output is correct
24 Correct 143 ms 165196 KB Output is correct
25 Correct 95 ms 94284 KB Output is correct
26 Correct 132 ms 145920 KB Output is correct
27 Correct 139 ms 145856 KB Output is correct