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답안 #441229

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
441229 2021-07-04T17:35:54 Z Ozy Inside information (BOI21_servers) C++17
50 / 100
 400 ms 44032 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 120000
#define des first
#define val second

struct x{
    lli prof;
    lli creciente;
    lli decreciente;
};

lli n,q,a,b,ta,tb,cambio,k,w,c;
lli padres[19][MAX+2],tam[MAX+2],pas[MAX+2];
vector< pair<lli,lli> > hijos[MAX+2];
x nodos[MAX+2];
vector<x> querys;
char tipo;

void une(lli pos, lli padre, lli p) {

    lli nuevo,cont = 1;
    padres[0][pos] = padre;
    nuevo = padre;

    nodos[pos].prof = p;

    while (padres[cont-1][nuevo] != 0) {
        padres[cont][pos] = padres[cont-1][nuevo];
        nuevo = padres[cont][pos];
        cont++;
    }

    for (auto h : hijos[pos]){
        if (h.des == padre) continue;

        if (h.val > pas[pos]) {
            nodos[h.des].creciente = nodos[pos].creciente + 1;
            nodos[h.des].decreciente = 1;
        }
        else {
            nodos[h.des].decreciente = nodos[pos].decreciente + 1;
            nodos[h.des].creciente = 1;
        }

        pas[h.des] = h.val;
        une(h.des,pos,p+1);
    }
}

lli lift(lli pp, lli dis) {

    lli cont = 0;
    while (dis > 0) {
        if (dis&1) pp = padres[cont][pp];
        cont++;
        dis /= 2;
    }
    return pp;
}

lli LCA(lli x, lli y) {

   repa(i,17,0) {
        if (padres[i][x] != padres[i][y]) {
            y = padres[i][y];
            x = padres[i][x];
        }
   }

    ta = x;
    tb = y;
    return padres[0][y];
}

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

    cin >> n >> q;

    q += n-1;
    rep(T,1,q) {
        cin >> tipo;
        if (tipo == 'S') {
            cin >> a >> b;
            hijos[a].push_back({b,T});
            hijos[b].push_back({a,T});
        }
        else if (tipo == 'Q') {
            cin >> a >> b;
            querys.push_back({T,a,b});
        }
        else if (tipo == 'C') {
            cin >> a;
            //vacio
        }
    }

    pas[1] = 0;
    une(1,0,1);

    //rep(i,1,n) {
    //    cout << "Nodo " << i << endl;
    //    debugsl(nodos[i].creciente);
    //    debugsl(nodos[i].decreciente);
    //    debugsl(pas[i]);
    //    debug(nodos[i].prof);
    //}

    for (auto act : querys) {

        a = act.creciente;
        b = act.decreciente;
        w = act.prof;
        if (a == b) {cout << "yes\n"; continue;}

        cambio = true;
        if (nodos[a].prof > nodos[b].prof) {swap(a,b); cambio = false;}

        c = lift(b ,nodos[b].prof-nodos[a].prof);
        if (c != a) c = LCA(a,c);

        if (cambio) {

            k = nodos[b].prof - nodos[b].decreciente;
            if (k > nodos[c].prof) {cout << "no\n"; continue;}

            k = nodos[a].prof - nodos[a].creciente;
            if (k > nodos[c].prof) {cout << "no\n"; continue;}

            if (a == c){
                c = lift(b ,nodos[b].prof-nodos[a].prof-1);
                if (pas[c] > w) {cout << "no\n"; continue;}
            }
            else {
                if (pas[a] > w) {cout << "no\n"; continue;}
                if (pas[tb] > pas[ta]) {cout << "no\n"; continue;}
            }

            cout << "yes\n";

        }
        else {
            k = nodos[a].prof - nodos[a].decreciente;
            if (k > nodos[c].prof) {cout << "no\n"; continue;}

            k = nodos[b].prof - nodos[b].creciente;
            if (k > nodos[c].prof) {cout << "no\n"; continue;}

            if (pas[b] > w) {cout << "no\n"; continue;}
            if (c != a && pas[ta] > pas[tb]) {cout << "no\n"; continue;}

            cout << "yes\n";
        }


    }

}

Subtask #1
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 6448 KB Output is correct
2 Correct 61 ms 8148 KB Output is correct
3 Correct 60 ms 8284 KB Output is correct
4 Correct 64 ms 8504 KB Output is correct
5 Correct 46 ms 8864 KB Output is correct
6 Correct 60 ms 8132 KB Output is correct

Subtask #2
0 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 6448 KB Output is correct
2 Correct 61 ms 8148 KB Output is correct
3 Correct 60 ms 8284 KB Output is correct
4 Correct 64 ms 8504 KB Output is correct
5 Correct 46 ms 8864 KB Output is correct
6 Correct 60 ms 8132 KB Output is correct
7 Incorrect 41 ms 7136 KB Extra information in the output file
8 Halted 0 ms 0 KB -

Subtask #3
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 39 ms 6400 KB Output is correct
2 Correct 160 ms 19520 KB Output is correct
3 Correct 157 ms 19520 KB Output is correct

Subtask #4
0 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 39 ms 6400 KB Output is correct
2 Correct 160 ms 19520 KB Output is correct
3 Correct 157 ms 19520 KB Output is correct
4 Incorrect 38 ms 7124 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #5
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 6480 KB Output is correct
2 Correct 139 ms 40708 KB Output is correct
3 Correct 137 ms 40712 KB Output is correct
4 Correct 155 ms 40096 KB Output is correct

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 6480 KB Output is correct
2 Correct 139 ms 40708 KB Output is correct
3 Correct 137 ms 40712 KB Output is correct
4 Correct 155 ms 40096 KB Output is correct
5 Incorrect 32 ms 6376 KB Extra information in the output file
6 Halted 0 ms 0 KB -

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 6460 KB Output is correct
2 Correct 162 ms 24496 KB Output is correct
3 Correct 145 ms 24688 KB Output is correct

Subtask #8
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 6460 KB Output is correct
2 Correct 162 ms 24496 KB Output is correct
3 Correct 145 ms 24688 KB Output is correct
4 Incorrect 37 ms 7116 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #9
12.5 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 6404 KB Output is correct
2 Correct 141 ms 40716 KB Output is correct
3 Correct 142 ms 40684 KB Output is correct
4 Correct 161 ms 40268 KB Output is correct
5 Correct 38 ms 6480 KB Output is correct
6 Correct 152 ms 24452 KB Output is correct
7 Correct 160 ms 24744 KB Output is correct
8 Correct 300 ms 30680 KB Output is correct
9 Correct 242 ms 29728 KB Output is correct
10 Correct 250 ms 40376 KB Output is correct
11 Correct 364 ms 39712 KB Output is correct

Subtask #10
0 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 6404 KB Output is correct
2 Correct 141 ms 40716 KB Output is correct
3 Correct 142 ms 40684 KB Output is correct
4 Correct 161 ms 40268 KB Output is correct
5 Correct 38 ms 6480 KB Output is correct
6 Correct 152 ms 24452 KB Output is correct
7 Correct 160 ms 24744 KB Output is correct
8 Correct 300 ms 30680 KB Output is correct
9 Correct 242 ms 29728 KB Output is correct
10 Correct 250 ms 40376 KB Output is correct
11 Correct 364 ms 39712 KB Output is correct
12 Incorrect 33 ms 7120 KB Extra information in the output file
13 Halted 0 ms 0 KB -

Subtask #11
17.5 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 6452 KB Output is correct
2 Correct 63 ms 8208 KB Output is correct
3 Correct 59 ms 8236 KB Output is correct
4 Correct 64 ms 8572 KB Output is correct
5 Correct 46 ms 8880 KB Output is correct
6 Correct 60 ms 8160 KB Output is correct
7 Correct 39 ms 7332 KB Output is correct
8 Correct 169 ms 19544 KB Output is correct
9 Correct 159 ms 19524 KB Output is correct
10 Correct 35 ms 7324 KB Output is correct
11 Correct 145 ms 44012 KB Output is correct
12 Correct 142 ms 44032 KB Output is correct
13 Correct 167 ms 43376 KB Output is correct
14 Correct 37 ms 7380 KB Output is correct
15 Correct 157 ms 24424 KB Output is correct
16 Correct 147 ms 24688 KB Output is correct
17 Correct 291 ms 30756 KB Output is correct
18 Correct 232 ms 29824 KB Output is correct
19 Correct 245 ms 40380 KB Output is correct
20 Correct 400 ms 39656 KB Output is correct
21 Correct 164 ms 21064 KB Output is correct
22 Correct 169 ms 21916 KB Output is correct
23 Correct 219 ms 25520 KB Output is correct
24 Correct 245 ms 26592 KB Output is correct
25 Correct 299 ms 36956 KB Output is correct
26 Correct 143 ms 24848 KB Output is correct
27 Correct 134 ms 24500 KB Output is correct

Subtask #12
0 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 6452 KB Output is correct
2 Correct 63 ms 8208 KB Output is correct
3 Correct 59 ms 8236 KB Output is correct
4 Correct 64 ms 8572 KB Output is correct
5 Correct 46 ms 8880 KB Output is correct
6 Correct 60 ms 8160 KB Output is correct
7 Correct 39 ms 7332 KB Output is correct
8 Correct 169 ms 19544 KB Output is correct
9 Correct 159 ms 19524 KB Output is correct
10 Correct 35 ms 7324 KB Output is correct
11 Correct 145 ms 44012 KB Output is correct
12 Correct 142 ms 44032 KB Output is correct
13 Correct 167 ms 43376 KB Output is correct
14 Correct 37 ms 7380 KB Output is correct
15 Correct 157 ms 24424 KB Output is correct
16 Correct 147 ms 24688 KB Output is correct
17 Correct 291 ms 30756 KB Output is correct
18 Correct 232 ms 29824 KB Output is correct
19 Correct 245 ms 40380 KB Output is correct
20 Correct 400 ms 39656 KB Output is correct
21 Correct 164 ms 21064 KB Output is correct
22 Correct 169 ms 21916 KB Output is correct
23 Correct 219 ms 25520 KB Output is correct
24 Correct 245 ms 26592 KB Output is correct
25 Correct 299 ms 36956 KB Output is correct
26 Correct 143 ms 24848 KB Output is correct
27 Correct 134 ms 24500 KB Output is correct
28 Incorrect 41 ms 7212 KB Extra information in the output file
29 Halted 0 ms 0 KB -