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답안 #592279

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
592279 2022-07-08T20:52:39 Z Lobo Designated Cities (JOI19_designated_cities) C++17
23 / 100
 2000 ms 35892 KB 
#include<bits/stdc++.h>
using namespace std;

const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

const int maxn = 2e5+10;

int n, q, comp[maxn], mark[maxn], ans[maxn], pai[maxn];
pair<int,int> dp[maxn];
vector<pair<pair<int,int>,pair<int,int>>> edg;
vector<int> vert, g[maxn];

int dfsdeep(int u, int ant, int val) {
    vert.pb(u);
    pai[u] = ant;
    dp[u] = mp(val,u);
    int up = 0;
    for(auto id : g[u]) {
        int v = u^edg[id].fr.fr^edg[id].fr.sc;
        if(v == ant) continue;
        int w;
        if(edg[id].fr.fr == u) w = edg[id].sc.fr;
        else w = edg[id].sc.sc;
        if(ant == 0) 
            comp[v] = v;
        else
            comp[v] = comp[u];
        up+= edg[id].sc.fr+edg[id].sc.sc-w;
        up+= dfsdeep(v,u,w);
        dp[u] = max(dp[u],mp(dp[v].fr+val,dp[v].sc));
    }
    return up;
}

void sol(int rt) {
    vert.clear();
    int up = dfsdeep(rt,0,0);
    vector<pair<int,int>> deeps;
    //pego eu mesmo e os melhores dos outros
    for(auto v : vert) {
        mark[v] = 0;
        deeps.pb(mp(dp[v].fr,v));
    }
    sort(all(deeps),greater<pair<int,int>>());

    int qtdc = 1;
    int ans1 = up;
    ans[1] = max(ans[1],ans1);
    for(auto X : deeps) {
        int v = X.sc;
        if(mark[v]) continue;
        ans1+= dp[v].fr;
        qtdc++;
        ans[qtdc] = max(ans[qtdc],ans1);
        v = dp[v].sc;
        // cout << v << " " << X.fr << endl;

        while(v != 0 && mark[v] == 0) {
            mark[v] = 1;
            v = pai[v];
        }
    }

    //obriga a escolher de subs diferentes
    ans1 = up;
    qtdc = 2;
    for(auto v : vert) {
        mark[v] = 0;
    }
    int v1 = dp[rt].sc;
    ans1+= dp[rt].fr;
    int comp1 = comp[v1];
    while(v1 != 0 && mark[v1] == 0) {
        mark[v1] = 1;
        v1 = pai[v1];
    }

    for(auto X : deeps) {
        int v = X.sc;
        if(mark[v] || comp[dp[v].sc] == comp1) continue;
        ans1+= dp[v].fr;
        qtdc++;
        ans[qtdc] = max(ans[qtdc],ans1);
        v = dp[v].sc;
        // cout << v << " " << X.fr << endl;

        while(v != 0 && mark[v] == 0) {
            mark[v] = 1;
            v = pai[v];
        }
        break;
    }
    
    for(auto X : deeps) {
        int v = X.sc;
        if(mark[v]) continue;
        ans1+= dp[v].fr;
        qtdc++;
        ans[qtdc] = max(ans[qtdc],ans1);
        v = dp[v].sc;
        // cout << v << " " << X.fr << endl;

        while(v != 0 && mark[v] == 0) {
            mark[v] = 1;
            v = pai[v];
        }
    }

}

void solve() {
    cin >> n;
    for(int i = 0; i < n-1; i++) {
        int u,v,w1,w2;
        cin >> u >> v >> w1 >> w2;
        g[u].pb(i);
        g[v].pb(i);
        ans[0]+= w1+w2;
        edg.pb(mp(mp(u,v),mp(w1,w2)));
    }

    for(int i = 1; i <= n; i++) {
        sol(i);
    }
    for(int i = 2; i <= n; i++) {
        ans[i] = max(ans[i],ans[i-1]);
    }

    cin >> q;
    while(q--) {
        int x; cin >> x;
        cout << ans[0]-ans[x] << endl;
    }
}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    int tt = 1;
    // cin >> tt;
    while(tt--) {
        solve();
    }

}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 5048 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Execution timed out 2065 ms 35892 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Execution timed out 2073 ms 35848 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 5048 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 528 ms 5348 KB Output is correct
14 Correct 388 ms 5588 KB Output is correct
15 Correct 546 ms 5344 KB Output is correct
16 Correct 560 ms 5348 KB Output is correct
17 Correct 544 ms 5364 KB Output is correct
18 Correct 537 ms 5344 KB Output is correct
19 Correct 522 ms 5348 KB Output is correct
20 Correct 535 ms 5340 KB Output is correct
21 Correct 513 ms 5364 KB Output is correct
22 Correct 494 ms 5348 KB Output is correct
23 Correct 481 ms 5332 KB Output is correct
24 Correct 436 ms 5352 KB Output is correct
25 Correct 423 ms 5548 KB Output is correct
26 Correct 431 ms 5356 KB Output is correct

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Execution timed out 2065 ms 35892 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 5048 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Execution timed out 2065 ms 35892 KB Time limit exceeded
14 Halted 0 ms 0 KB -