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답안 #983615

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
983615 2024-05-15T19:07:16 Z RakhimovAmir 자매 도시 (APIO20_swap) C++17
0 / 100
 140 ms 36400 KB 
#include "swap.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long

struct edge {
    int w, x, y;
};

const int N = 1e5 + 100, M = 25;
vector<pair<int, int>> g[N];
vector<edge> edges;
int prt[N], a[N], b[N], p[N][M], mx[N][M], tin[N], tout[N], tt, G;
bool fl[N], visited[N];
vector<int> v[N];

bool cmp(edge a, edge b) {
    return a.w < b.w;
}

int findParent(int x) {
    if (prt[x] == x)
        return x;
    return prt[x] = findParent(prt[x]);
}

void addEdge(int x, int y, int w) {
    g[x].push_back({w, y});
    g[y].push_back({w, x});
}

void merge(int x, int y, int w) {
    int X = prt[x], Y = prt[y];
    if (X == Y) {
        if (int(v[X].size()) == 1)
            return;
        fl[X] = 0;
        G++;
        for (auto i : v[X]) {
            addEdge(G, i, w);
        }
        v[X].clear();
        v[X].push_back(G);
        return;
    }
    if (int(v[Y].size()) > int(v[X].size())) {
        swap(x, y);
        swap(X, Y);
    }
    prt[Y] = X;
    for (auto i : v[Y]) {
        v[X].push_back(i);
    }
    if (!fl[X] || !fl[Y] || (x != a[X] && x != b[X]) || (y != a[Y] && y != b[Y])) {
        fl[X] = 0;
        G++;
        for (auto i : v[X]) {
            addEdge(G, i, w);
        }
        v[X].clear();
        v[X].push_back(G);
        return;
    } else {
        if (x == a[X]) {
            if (y == b[Y])
                a[X] = a[Y];
            else
                a[X] = b[Y];
        }
        else {
            if (y == b[Y])
                b[X] = a[Y];
            else
                b[X] = b[Y];
        }
    }
}

void dfs(int x, int par, int w) {
    tin[x] = ++tt;
    visited[x] = 1;
    for (auto to : g[x]) {
        if (!visited[to.second])
          dfs(to.second, x, to.first);
    }
    p[x][0] = par;
    mx[x][0] = w;
    for (int i = 1; i < M; i++) {
        p[x][i] = p[p[x][i - 1]][i - 1];
        mx[x][i] = max(mx[x][i - 1], mx[p[x][i - 1]][i - 1]);
        // cout << mx[x][i] << " " << x << " " << i << "\n";
    }
    tout[x] = tt;
}

int ispr(int x, int y) {
    return tin[x] <= tin[y] && tout[x] >= tout[y];
}

int lca(int x, int y) {
    if (ispr(x, y))
        return x;
    if (ispr(y, x))
        return y;
    for (int i = M - 1; i >= 0; i--) {
        if (!ispr(p[x][i], y))
            x = p[x][i];
    }
    x = p[x][0];
    return x;
}

int findMax(int x, int y) {
    int ret = 0;
    if (x == y)
        return 0;
     for (int i = M - 1; i >= 0; i--) {
        if (!ispr(p[x][i], y)) {
            ret = max(ret, mx[x][i]);
            x = p[x][i];
        }
    }
    ret = max(ret, mx[x][0]);
    return ret;
}

void init(int N, int M, vector<int> U, vector<int> V, vector<int> W) {
    for (int i = 0; i < N; i++) {
        prt[i] = i;
        a[i] = i;
        b[i] = i;
        fl[i] = 1;
        v[i].push_back(i);
    }
    G = N - 1;
    for (int i = 0; i < M; i++) {
        edges.push_back({W[i], U[i], V[i]});
    }
    sort(edges.begin(), edges.end(), cmp);
    for (auto i : edges) {
        merge(i.x, i.y, i.w);
    }

    for (int i = G; i >= 0; i--) {
        // int pr = findParent(i);
        if (!visited[i]) {
            dfs(i, i, 0);
        }
    }
}

int getMinimumFuelCapacity(int X, int Y) {
    int P = lca(X, Y);
    if (!ispr(P, X) || !ispr(P, Y) || X == Y)
      return -1;
    return max(findMax(X, P), findMax(Y, P));
}

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10328 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 2 ms 10332 KB Output is correct
5 Correct 3 ms 10332 KB Output is correct
6 Correct 3 ms 10332 KB Output is correct
7 Correct 3 ms 10332 KB Output is correct
8 Correct 3 ms 10332 KB Output is correct
9 Correct 50 ms 32992 KB Output is correct
10 Correct 59 ms 34252 KB Output is correct
11 Correct 58 ms 33992 KB Output is correct
12 Correct 63 ms 34508 KB Output is correct
13 Correct 61 ms 34784 KB Output is correct
14 Correct 66 ms 33004 KB Output is correct
15 Correct 140 ms 36168 KB Output is correct
16 Correct 119 ms 35820 KB Output is correct
17 Correct 126 ms 36212 KB Output is correct
18 Correct 117 ms 36400 KB Output is correct
19 Incorrect 57 ms 17936 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10328 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Runtime error 73 ms 33180 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10328 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 2 ms 10332 KB Output is correct
5 Correct 3 ms 10332 KB Output is correct
6 Correct 3 ms 10332 KB Output is correct
7 Correct 3 ms 10332 KB Output is correct
8 Correct 3 ms 10332 KB Output is correct
9 Incorrect 2 ms 10332 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 10332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10328 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 2 ms 10332 KB Output is correct
5 Correct 3 ms 10332 KB Output is correct
6 Correct 3 ms 10332 KB Output is correct
7 Correct 3 ms 10332 KB Output is correct
8 Correct 3 ms 10332 KB Output is correct
9 Correct 50 ms 32992 KB Output is correct
10 Correct 59 ms 34252 KB Output is correct
11 Correct 58 ms 33992 KB Output is correct
12 Correct 63 ms 34508 KB Output is correct
13 Correct 61 ms 34784 KB Output is correct
14 Correct 66 ms 33004 KB Output is correct
15 Correct 140 ms 36168 KB Output is correct
16 Correct 119 ms 35820 KB Output is correct
17 Correct 126 ms 36212 KB Output is correct
18 Correct 117 ms 36400 KB Output is correct
19 Runtime error 73 ms 33180 KB Execution killed with signal 11
20 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 10332 KB Output isn't correct
2 Halted 0 ms 0 KB -