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답안 #445396

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
445396 2021-07-17T21:04:18 Z Ozy Inside information (BOI21_servers) C++17
100 / 100
 732 ms 41764 KB 
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for (int i = (a); i <= (b); i++)
#define repa(i,a,b) for (int i = (a); i >= (b); i--)
#define lli long long
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "

#define MAX 240000
#define costo first
#define des second

struct x {
    lli tipo;
    lli des;
    lli tiempo;
    lli id;
};

lli n,qq,a,b,cent,cont,t;
lli visitados[MAX+2],tam[MAX+2],llego[MAX+2],bit[MAX+2];
char c;
queue<lli> cola;
vector<pair<lli,lli> > hijos[MAX+2];
vector<x> querys[MAX+2];
pair<lli,lli> res[MAX+2];

void actualiza(lli pos,lli val) {
    while (pos <= t) {
        bit[pos] += val;
        pos += pos&(-pos);
    }
}

lli sum(lli pos) {
    lli r = 0;
    while (pos > 0) {
        r += bit[pos];
        pos -= pos&(-pos);
    }
    return r;
}

lli buscaCen (lli pos, lli padre, lli mitad) {
    for (auto h : hijos[pos]){
        if (h.des == padre || visitados[h.des] == 1) continue;
        if (tam[h.des] > mitad) return buscaCen(h.des, pos, mitad);
    }
    return pos;
}

void DFS(lli pos, lli padre) {

    tam[pos] = 1;
    for (auto h : hijos[pos]) {
        if (h.des == padre || visitados[h.des] == 1) continue;
        DFS(h.des, pos);
        tam[pos] += tam[h.des];
    }

}

void ami(lli pos, lli padre, lli ant, vector<lli> &nuevos) {

    nuevos.push_back(pos);
    for (auto h : hijos[pos]) {
        if (h.des == padre || visitados[h.des] == 1) continue;
        if (h.costo > ant) continue;
        ami(h.des,pos,h.costo,nuevos);
    }

}

void aellos(lli pos, lli padre, lli ant, vector<pair<lli,lli> > & acc) {
    acc.push_back({pos,ant});
    for (auto h : hijos[pos]) {
        if (h.des == padre || visitados[h.des] == 1) continue;
        if (h.costo < ant) continue;
        aellos(h.des,pos,h.costo,acc);
    }
}

void solve() {
    lli act;

    while (!cola.empty()) {
        act = cola.front();
        cola.pop();

        DFS(act,0);
        cent = buscaCen(act,0,tam[act]/2);

        sort(hijos[cent].begin(), hijos[cent].end());
        reverse(hijos[cent].begin(),hijos[cent].end());

        vector < pair<lli,lli> > deshacer;
        for (auto h : hijos[cent]) {

            if (visitados[h.des] == 1) continue;

            vector<lli> nuevos;
            ami(h.des,cent,h.costo,nuevos);

            for (auto nodo : nuevos) {

                for (auto q : querys[nodo]) {
                    if (q.tipo == 1) {


                        if (q.des == cent && q.tiempo > h.costo) res[q.id].second = 1;
                        else if (llego[q.des] > 0 && llego[q.des] < q.tiempo) res[q.id].second = 1;

                    }
                    else {

                        res[q.id].second += sum(q.tiempo);
                        if (h.costo < q.tiempo) res[q.id].second++;

                    }
                }
            }

            vector< pair<lli,lli> > accesibles;
            aellos(h.des,cent,h.costo,accesibles);

            for ( auto nodo : accesibles) {
                deshacer.push_back(nodo);
                llego[nodo.first] = nodo.second;
                actualiza(nodo.second,1);
            }
        }

        for (auto q : querys[cent]) {
            if (q.tipo == 1) {

                if (llego[q.des] > 0 && llego[q.des] < q.tiempo) res[q.id].second = 1;

            }
            else {
                res[q.id].second += sum(q.tiempo);
            }
        }

        for (auto borr : deshacer) {
            llego[borr.first] = 0;
            actualiza(borr.second,-1);
        }

        visitados[cent] = 1;
        for (auto h : hijos[cent]) {
            if (visitados[h.des] == 1) continue;
            cola.push(h.des);
        }

    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> qq;
    t = n+qq-1;

    cont = 1;
    rep(i,1,t){
        cin >> c;
        if (c == 'S') {
            cin >> a >> b;
            hijos[a].push_back({i,b});
            hijos[b].push_back({i,a});
        }
        else if (c == 'Q') {
            cin >> a >> b;
            querys[b].push_back({1,a,i,cont});
            res[cont].first = 1;
            if (a == b) res[cont].second = 1;
            cont++;
        }
        else {
            cin >> a;
            querys[a].push_back({2,0,i,cont});
            res[cont].first = 2;
            cont++;
        }
    }

    cola.push(1);
    solve();

    cont--;
    rep(i,1,cont) {
        if (res[i].first == 2) cout << res[i].second+1 << "\n";
        else {
            if (res[i].second == 1) cout << "yes\n";
            else cout << "no\n";
        }
    }
}

Subtask #1
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19776 KB Output is correct
2 Correct 56 ms 22784 KB Output is correct
3 Correct 48 ms 21804 KB Output is correct
4 Correct 54 ms 22852 KB Output is correct
5 Correct 52 ms 22272 KB Output is correct
6 Correct 51 ms 22212 KB Output is correct

Subtask #2
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19776 KB Output is correct
2 Correct 56 ms 22784 KB Output is correct
3 Correct 48 ms 21804 KB Output is correct
4 Correct 54 ms 22852 KB Output is correct
5 Correct 52 ms 22272 KB Output is correct
6 Correct 51 ms 22212 KB Output is correct
7 Correct 38 ms 20540 KB Output is correct
8 Correct 58 ms 22412 KB Output is correct
9 Correct 50 ms 21152 KB Output is correct
10 Correct 58 ms 22468 KB Output is correct
11 Correct 55 ms 21828 KB Output is correct
12 Correct 49 ms 20708 KB Output is correct

Subtask #3
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19776 KB Output is correct
2 Correct 198 ms 31016 KB Output is correct
3 Correct 200 ms 33784 KB Output is correct

Subtask #4
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19776 KB Output is correct
2 Correct 198 ms 31016 KB Output is correct
3 Correct 200 ms 33784 KB Output is correct
4 Correct 41 ms 20644 KB Output is correct
5 Correct 195 ms 33460 KB Output is correct
6 Correct 132 ms 33812 KB Output is correct
7 Correct 137 ms 31396 KB Output is correct

Subtask #5
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19784 KB Output is correct
2 Correct 431 ms 38248 KB Output is correct
3 Correct 453 ms 41500 KB Output is correct
4 Correct 359 ms 41612 KB Output is correct

Subtask #6
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19784 KB Output is correct
2 Correct 431 ms 38248 KB Output is correct
3 Correct 453 ms 41500 KB Output is correct
4 Correct 359 ms 41612 KB Output is correct
5 Correct 38 ms 20544 KB Output is correct
6 Correct 459 ms 41016 KB Output is correct
7 Correct 428 ms 41452 KB Output is correct
8 Correct 464 ms 40660 KB Output is correct
9 Correct 460 ms 40732 KB Output is correct

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19776 KB Output is correct
2 Correct 342 ms 30908 KB Output is correct
3 Correct 373 ms 34628 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19776 KB Output is correct
2 Correct 342 ms 30908 KB Output is correct
3 Correct 373 ms 34628 KB Output is correct
4 Correct 39 ms 20604 KB Output is correct
5 Correct 350 ms 33796 KB Output is correct
6 Correct 414 ms 34156 KB Output is correct

Subtask #9
12.5 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 38 ms 19776 KB Output is correct
2 Correct 422 ms 38208 KB Output is correct
3 Correct 424 ms 41412 KB Output is correct
4 Correct 354 ms 41764 KB Output is correct
5 Correct 37 ms 20704 KB Output is correct
6 Correct 314 ms 34156 KB Output is correct
7 Correct 372 ms 34592 KB Output is correct
8 Correct 365 ms 33948 KB Output is correct
9 Correct 391 ms 34892 KB Output is correct
10 Correct 542 ms 39160 KB Output is correct
11 Correct 503 ms 37976 KB Output is correct

Subtask #10
12.5 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 38 ms 19776 KB Output is correct
2 Correct 422 ms 38208 KB Output is correct
3 Correct 424 ms 41412 KB Output is correct
4 Correct 354 ms 41764 KB Output is correct
5 Correct 37 ms 20704 KB Output is correct
6 Correct 314 ms 34156 KB Output is correct
7 Correct 372 ms 34592 KB Output is correct
8 Correct 365 ms 33948 KB Output is correct
9 Correct 391 ms 34892 KB Output is correct
10 Correct 542 ms 39160 KB Output is correct
11 Correct 503 ms 37976 KB Output is correct
12 Correct 37 ms 20604 KB Output is correct
13 Correct 452 ms 41148 KB Output is correct
14 Correct 422 ms 41432 KB Output is correct
15 Correct 447 ms 40644 KB Output is correct
16 Correct 471 ms 40700 KB Output is correct
17 Correct 38 ms 20612 KB Output is correct
18 Correct 358 ms 33904 KB Output is correct
19 Correct 390 ms 34116 KB Output is correct
20 Correct 386 ms 33476 KB Output is correct
21 Correct 411 ms 34500 KB Output is correct
22 Correct 682 ms 38080 KB Output is correct
23 Correct 732 ms 37452 KB Output is correct
24 Correct 638 ms 38056 KB Output is correct

Subtask #11
17.5 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19972 KB Output is correct
2 Correct 51 ms 22744 KB Output is correct
3 Correct 49 ms 21804 KB Output is correct
4 Correct 54 ms 22856 KB Output is correct
5 Correct 51 ms 22212 KB Output is correct
6 Correct 50 ms 22232 KB Output is correct
7 Correct 42 ms 20720 KB Output is correct
8 Correct 194 ms 30964 KB Output is correct
9 Correct 198 ms 33792 KB Output is correct
10 Correct 37 ms 20704 KB Output is correct
11 Correct 439 ms 41488 KB Output is correct
12 Correct 434 ms 41484 KB Output is correct
13 Correct 357 ms 41608 KB Output is correct
14 Correct 37 ms 20672 KB Output is correct
15 Correct 310 ms 34152 KB Output is correct
16 Correct 362 ms 34556 KB Output is correct
17 Correct 364 ms 33988 KB Output is correct
18 Correct 380 ms 34928 KB Output is correct
19 Correct 575 ms 39084 KB Output is correct
20 Correct 502 ms 38032 KB Output is correct
21 Correct 233 ms 34992 KB Output is correct
22 Correct 228 ms 35088 KB Output is correct
23 Correct 293 ms 33852 KB Output is correct
24 Correct 288 ms 33884 KB Output is correct
25 Correct 440 ms 37268 KB Output is correct
26 Correct 410 ms 33852 KB Output is correct
27 Correct 385 ms 34792 KB Output is correct

Subtask #12
17.5 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 19972 KB Output is correct
2 Correct 51 ms 22744 KB Output is correct
3 Correct 49 ms 21804 KB Output is correct
4 Correct 54 ms 22856 KB Output is correct
5 Correct 51 ms 22212 KB Output is correct
6 Correct 50 ms 22232 KB Output is correct
7 Correct 42 ms 20720 KB Output is correct
8 Correct 194 ms 30964 KB Output is correct
9 Correct 198 ms 33792 KB Output is correct
10 Correct 37 ms 20704 KB Output is correct
11 Correct 439 ms 41488 KB Output is correct
12 Correct 434 ms 41484 KB Output is correct
13 Correct 357 ms 41608 KB Output is correct
14 Correct 37 ms 20672 KB Output is correct
15 Correct 310 ms 34152 KB Output is correct
16 Correct 362 ms 34556 KB Output is correct
17 Correct 364 ms 33988 KB Output is correct
18 Correct 380 ms 34928 KB Output is correct
19 Correct 575 ms 39084 KB Output is correct
20 Correct 502 ms 38032 KB Output is correct
21 Correct 233 ms 34992 KB Output is correct
22 Correct 228 ms 35088 KB Output is correct
23 Correct 293 ms 33852 KB Output is correct
24 Correct 288 ms 33884 KB Output is correct
25 Correct 440 ms 37268 KB Output is correct
26 Correct 410 ms 33852 KB Output is correct
27 Correct 385 ms 34792 KB Output is correct
28 Correct 37 ms 20664 KB Output is correct
29 Correct 56 ms 22420 KB Output is correct
30 Correct 49 ms 21172 KB Output is correct
31 Correct 62 ms 22480 KB Output is correct
32 Correct 63 ms 21904 KB Output is correct
33 Correct 49 ms 20776 KB Output is correct
34 Correct 37 ms 20672 KB Output is correct
35 Correct 192 ms 33364 KB Output is correct
36 Correct 128 ms 33900 KB Output is correct
37 Correct 133 ms 31408 KB Output is correct
38 Correct 38 ms 20544 KB Output is correct
39 Correct 450 ms 41240 KB Output is correct
40 Correct 416 ms 41344 KB Output is correct
41 Correct 448 ms 40728 KB Output is correct
42 Correct 467 ms 40776 KB Output is correct
43 Correct 45 ms 20544 KB Output is correct
44 Correct 356 ms 33868 KB Output is correct
45 Correct 383 ms 34196 KB Output is correct
46 Correct 401 ms 33476 KB Output is correct
47 Correct 409 ms 34464 KB Output is correct
48 Correct 715 ms 37956 KB Output is correct
49 Correct 732 ms 37488 KB Output is correct
50 Correct 671 ms 38064 KB Output is correct
51 Correct 167 ms 34552 KB Output is correct
52 Correct 159 ms 32112 KB Output is correct
53 Correct 162 ms 31812 KB Output is correct
54 Correct 145 ms 35048 KB Output is correct
55 Correct 145 ms 33408 KB Output is correct
56 Correct 269 ms 32944 KB Output is correct
57 Correct 338 ms 36732 KB Output is correct
58 Correct 560 ms 33052 KB Output is correct
59 Correct 392 ms 34508 KB Output is correct