oj.uz

답안 #426756

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
426756 2021-06-14T09:35:03 Z Hideo Designated Cities (JOI19_designated_cities) C++17
39 / 100
 2000 ms 94060 KB 
#pragma GCC optimize ("Ofast")
#pragma GCC target ("avx,avx2,fma")

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

#define all(s) s.begin(), s.end()
#define int long long
#define fr first
#define sc second
#define pb push_back
#define mk make_pair
#define pi pair < int, int >

const int N = 2e5 + 7;
const int INF = 1e9 + 7;

pi t[4 * N];
int lz[4 * N];
int p[N][20], h[2][N], w[N];
int tin[N], tout[N], tim;
int ans[N];
int n, rt, s, s_up;

vector < pair < int, pi > > g[N];

pi lr[N], lg[2][N];
int rv[N], del[N], cnt;
vector < int > a;

int lc, x, y;

void dfs (int v, int pr = 0){
    lg[0][v] = lg[1][v] = {0, v};
    lr[v] = {INF, 0};
    tin[v] = ++tim;
    p[v][0] = pr;
    for (int j = 1; j < 20; j++)
        p[v][j] = p[p[v][j - 1]][j - 1];
    for (auto to : g[v]){
        if (to.fr != pr){
            s_up += to.sc.sc;
            h[0][to.fr] = h[0][v] + to.sc.fr;
            h[1][to.fr] = h[1][v] + to.sc.sc;
            dfs(to.fr, v);
            lr[v].fr = min(lr[v].fr, lr[to.fr].fr);
            lr[v].sc = max(lr[v].sc, lr[to.fr].sc);
            if (lg[0][v].fr < lg[0][to.fr].fr + to.sc.fr){
                swap(lg[0][v], lg[1][v]);
                lg[0][v] = {lg[0][to.fr].fr + to.sc.fr, lg[0][to.fr].sc};
            }
            else if (lg[1][v].fr < lg[0][to.fr].fr + to.sc.fr)
                lg[1][v] = {lg[0][to.fr].fr + to.sc.fr, lg[0][to.fr].sc};
        }
    }
    tout[v] = tim;
    if (g[v].size() == 1){
        rv[v] = ++cnt;
        lr[v] = {rv[v], rv[v]};
        a.pb(v);
    }
}

inline bool check (int v, int u){
    return tin[v] <= tin[u] && tout[u] <= tout[v];
}

int lca (int v, int u){
    if (check(v, u))
        return v;
    if (check(u, v))
        return u;
    for (int j = 19; j >= 0; j--)
        if (p[v][j] && !check(p[v][j], u))
            v = p[v][j];
    return p[v][0];
}

inline int dis (int vv, int uu){
    int pp = lca(vv, uu);
    return h[1][vv] - h[1][pp] + h[0][uu] - h[0][pp];
}

void build (int v, int l, int r){
    if (l == r){
        t[v] = {dis(lc, a[l]), l};
        return;
    }
    else {
        int mid = (l + r) >> 1ll;
        build(v + v, l, mid);
        build(v + v + 1, mid + 1, r);
        if (t[v + v].fr > t[v + v + 1].fr)
            t[v] = t[v + v];
        else
            t[v] = t[v + v + 1];
    }
}

inline void push (int vv, int ll, int rr){
    if (ll != rr){
        lz[vv + vv] += lz[vv];
        lz[vv + vv + 1] += lz[vv];
    }
    t[vv].fr += lz[vv];
    lz[vv] = 0;
}

void upd (int v, int l, int r, int ql, int qr, int val){
    push(v, l, r);
    if (ql <= l && r <= qr){
        lz[v] = val;
        push(v, l, r);
        return;
    }
    if (r < ql || qr < l)
        return;
    int mid = (l + r) >> 1ll;
    upd(v + v, l, mid, ql, qr, val);
    upd(v + v + 1, mid + 1, r, ql, qr, val);
    if (t[v + v].fr > t[v + v + 1].fr)
        t[v] = t[v + v];
    else
        t[v] = t[v + v + 1];
}

void prec (int v, int pr = 0){
    for (auto to : g[v]){
        if (to.fr != pr){
            prec(to.fr, v);
            if (check(to.fr, lc))
                w[to.fr] = to.sc.sc;
            else
                w[to.fr] = to.sc.fr;
        }
    }
}

int negr, negr2;

vector < pi > prs;

void reroot (int v, int pr = 0, pi up = {0, 0}){
    if (up.fr > lg[0][v].fr){
        prs.pb({v, up.sc});
        lg[0][v] = up;
    }
    else
        prs.pb({v, lg[0][v].sc});
    for (auto to : g[v]){
        if (to.fr != pr){
            if (lg[0][v].sc == lg[0][to.fr].sc){
                reroot(to.fr, v, {lg[1][v].fr + to.sc.sc, lg[1][v].sc});
            }
            else {
                reroot(to.fr, v, {lg[0][v].fr + to.sc.sc, lg[0][v].sc});
            }
        }
    }
}

main (){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    a.pb(0);
    cin >> n;
    for (int i = 1; i < n; i++){
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        negr = c;
        negr2 = d;
        g[a].pb({b, {c, d}});
        g[b].pb({a, {d, c}});
        s += c + d;
    }
    if (n == 2){
        ans[1] = max(negr, negr2);
        ans[2] = s;
        int q;
        cin >> q;
        for (int i = 1; i <= q; i++){
            int e;
            cin >> e;
            cout << s - ans[e] << endl;
        }
        return 0;
    }
    for (int i = 1; i <= n; i++){
        if (g[i].size() > 1){
            rt = i;
            break;
        }
    }
    dfs(rt);
    for (int i = 1; i <= n; i++){
        ans[1] = max(ans[1], s_up - h[1][i] + h[0][i]);
    }
    reroot(rt);
    int mx = 0;
    for (pi it : prs){
        int v = it.fr, u = it.sc;
        int l = lca(v, u);
        if (mx < s_up - h[1][l] + h[0][l] + h[0][v] + h[0][u] - 2 * h[0][l]){
            mx = s_up - h[1][l] + h[0][l] + h[0][v] + h[0][u] - 2 * h[0][l];
            x = v, y = u;
        }
    }
    ans[2] = mx;
    lc = lca(x, y);
    prec(rt);
    build(1, 1, cnt);
    del[0] = 1;
    del[lc] = 1;
    while (x != lc){
        del[x] = 1;
        upd(1, 1, cnt, lr[x].fr, lr[x].sc, -w[x]);
        w[x] = 0;
        x = p[x][0];
    }
    while (y != lc){
        del[y] = 1;
        upd(1, 1, cnt, lr[y].fr, lr[y].sc, -w[y]);
        w[y] = 0;
        y = p[y][0];
    }
    for (int i = 3; i <= cnt; i++){
        int it = t[1].sc, val = t[1].fr;
        ans[i] = ans[i - 1] + val;
        if (lr[lc].fr <= it && it <= lr[lc].sc){
            int v = a[it];
            while (!del[v]){
                del[v] = 1;
                upd(1, 1, cnt, lr[v].fr, lr[v].sc, -w[v]);
                w[v] = 0;
                v = p[v][0];
            }
        }
        else {
            int nw = lca(lc, a[it]);
            int v = lc;
            while (v != nw){
                if (lr[v].fr > 1)
                    upd(1, 1, cnt, 1, lr[v].fr - 1, -w[v]);
                if (lr[v].sc < cnt)
                    upd(1, 1, cnt, lr[v].sc + 1, cnt, -w[v]);
                w[v] = 0;
                v = p[v][0];
                del[v] = 1;
            }
            v = a[it];
            while (!del[v]){
                del[v] = 1;
                upd(1, 1, cnt, lr[v].fr, lr[v].sc, -w[v]);
                w[v] = 0;
                v = p[v][0];
            }
        }
    }
    for (int i = cnt + 1; i <= n; i++)
        ans[i] = s;
    int q;
    cin >> q;
    for (int i = 1; i <= q; i++){
        int e;
        cin >> e;
        cout << s - ans[e] << endl;
    }
}

Compilation message

designated_cities.cpp:162:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  162 | main (){
      | ^~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 3 ms 5068 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 4 ms 5068 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 5068 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 4 ms 5068 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 792 ms 81328 KB Output is correct
3 Correct 639 ms 91004 KB Output is correct
4 Correct 589 ms 81468 KB Output is correct
5 Correct 648 ms 82180 KB Output is correct
6 Correct 709 ms 84172 KB Output is correct
7 Correct 568 ms 82392 KB Output is correct
8 Correct 757 ms 93936 KB Output is correct
9 Correct 619 ms 90296 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 819 ms 81376 KB Output is correct
3 Correct 622 ms 93832 KB Output is correct
4 Correct 589 ms 81328 KB Output is correct
5 Correct 635 ms 82212 KB Output is correct
6 Correct 679 ms 84532 KB Output is correct
7 Correct 563 ms 90316 KB Output is correct
8 Correct 734 ms 89804 KB Output is correct
9 Correct 580 ms 90244 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 3 ms 5068 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 4 ms 5068 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 5068 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 4 ms 5068 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 11 ms 5888 KB Output is correct
14 Correct 9 ms 5964 KB Output is correct
15 Correct 11 ms 5812 KB Output is correct
16 Correct 11 ms 5836 KB Output is correct
17 Correct 11 ms 5892 KB Output is correct
18 Correct 9 ms 5836 KB Output is correct
19 Correct 13 ms 5836 KB Output is correct
20 Correct 10 ms 5836 KB Output is correct
21 Correct 10 ms 5836 KB Output is correct
22 Correct 9 ms 5836 KB Output is correct
23 Correct 10 ms 5836 KB Output is correct
24 Correct 11 ms 5856 KB Output is correct
25 Correct 9 ms 5964 KB Output is correct
26 Correct 10 ms 5960 KB Output is correct

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 792 ms 81328 KB Output is correct
3 Correct 639 ms 91004 KB Output is correct
4 Correct 589 ms 81468 KB Output is correct
5 Correct 648 ms 82180 KB Output is correct
6 Correct 709 ms 84172 KB Output is correct
7 Correct 568 ms 82392 KB Output is correct
8 Correct 757 ms 93936 KB Output is correct
9 Correct 619 ms 90296 KB Output is correct
10 Correct 4 ms 4940 KB Output is correct
11 Correct 819 ms 81376 KB Output is correct
12 Correct 622 ms 93832 KB Output is correct
13 Correct 589 ms 81328 KB Output is correct
14 Correct 635 ms 82212 KB Output is correct
15 Correct 679 ms 84532 KB Output is correct
16 Correct 563 ms 90316 KB Output is correct
17 Correct 734 ms 89804 KB Output is correct
18 Correct 580 ms 90244 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 712 ms 81368 KB Output is correct
21 Correct 594 ms 94060 KB Output is correct
22 Correct 573 ms 81344 KB Output is correct
23 Correct 657 ms 81704 KB Output is correct
24 Execution timed out 2070 ms 80464 KB Time limit exceeded
25 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 3 ms 5068 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 4 ms 5068 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 5068 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 4 ms 5068 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 792 ms 81328 KB Output is correct
14 Correct 639 ms 91004 KB Output is correct
15 Correct 589 ms 81468 KB Output is correct
16 Correct 648 ms 82180 KB Output is correct
17 Correct 709 ms 84172 KB Output is correct
18 Correct 568 ms 82392 KB Output is correct
19 Correct 757 ms 93936 KB Output is correct
20 Correct 619 ms 90296 KB Output is correct
21 Correct 4 ms 4940 KB Output is correct
22 Correct 819 ms 81376 KB Output is correct
23 Correct 622 ms 93832 KB Output is correct
24 Correct 589 ms 81328 KB Output is correct
25 Correct 635 ms 82212 KB Output is correct
26 Correct 679 ms 84532 KB Output is correct
27 Correct 563 ms 90316 KB Output is correct
28 Correct 734 ms 89804 KB Output is correct
29 Correct 580 ms 90244 KB Output is correct
30 Correct 4 ms 4940 KB Output is correct
31 Correct 11 ms 5888 KB Output is correct
32 Correct 9 ms 5964 KB Output is correct
33 Correct 11 ms 5812 KB Output is correct
34 Correct 11 ms 5836 KB Output is correct
35 Correct 11 ms 5892 KB Output is correct
36 Correct 9 ms 5836 KB Output is correct
37 Correct 13 ms 5836 KB Output is correct
38 Correct 10 ms 5836 KB Output is correct
39 Correct 10 ms 5836 KB Output is correct
40 Correct 9 ms 5836 KB Output is correct
41 Correct 10 ms 5836 KB Output is correct
42 Correct 11 ms 5856 KB Output is correct
43 Correct 9 ms 5964 KB Output is correct
44 Correct 10 ms 5960 KB Output is correct
45 Correct 3 ms 4940 KB Output is correct
46 Correct 712 ms 81368 KB Output is correct
47 Correct 594 ms 94060 KB Output is correct
48 Correct 573 ms 81344 KB Output is correct
49 Correct 657 ms 81704 KB Output is correct
50 Execution timed out 2070 ms 80464 KB Time limit exceeded
51 Halted 0 ms 0 KB -