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답안 #371515

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
371515 2021-02-26T19:48:16 Z thecodingwizard 늑대인간 (IOI18_werewolf) C++11
15 / 100
 4000 ms 71732 KB 
#include <bits/stdc++.h>
#include "werewolf.h"
using namespace std;

#define pi pair<int, int>
#define f first
#define s second
#define mp make_pair
#define pb push_back

vector<int> adj[200000];
vector<int> adj2[200000];
int smallIdx[200000];
int smallStart[200000];
int smallEnd[200000];
int largeIdx[200000];
int largeStart[200000];
int largeEnd[200000];
int pa[200000];
int parSmall[200000][20];
int parLarge[200000][20];
int sz[200000];
int smallest[200000];
int largest[200000];

int ctr = 0;
void dfs(int u, int *idx, int *start, int *end) {
    start[u] = ctr;
    for (int v : adj2[u]) {
        dfs(v, idx, start, end);
    }
    end[u] = ctr;
    idx[u] = ctr++;
}

int get(int x) { return x == pa[x] ? x : pa[x] = get(pa[x]); }
void unite(int a, int b) {
    a = get(a), b = get(b);
    if (a == b) return;
    if (sz[a] > sz[b]) swap(a, b);
    pa[a] = b;
    sz[b] += sz[a];
    if (smallest[b] > smallest[a]) {
        // put b as child of a
        adj2[smallest[a]].pb(smallest[b]);
        parSmall[smallest[b]][0] = smallest[a];
    } else {
        adj2[smallest[b]].pb(smallest[a]);
        parSmall[smallest[a]][0] = smallest[b];
    }
    smallest[b] = min(smallest[b], smallest[a]);
}
void unite2(int a, int b) {
    a = get(a), b = get(b);
    if (a == b) return;
    if (sz[a] > sz[b]) swap(a, b);
    pa[a] = b;
    sz[b] += sz[a];
    if (largest[b] < largest[a]) {
        // put b as child of a
        adj2[largest[a]].pb(largest[b]);
        parLarge[largest[b]][0] = largest[a];
    } else {
        adj2[largest[b]].pb(largest[a]);
        parLarge[largest[a]][0] = largest[b];
    }
    largest[b] = max(largest[b], largest[a]);
}

vector<int> check_validity(int n, vector<int> X, vector<int> Y,
                                vector<int> S, vector<int> E,
                                vector<int> L, vector<int> R) {
    for (int i = 0; i < (int)X.size(); i++) {
        adj[X[i]].push_back(Y[i]);
        adj[Y[i]].push_back(X[i]);
    }

    for (int i = 0; i < n; i++) {
        pa[i] = i;
        sz[i] = 1;
        smallest[i] = i;
    }

    for (int i = n-1; ~i; i--) {
        for (int v : adj[i]) {
            if (v > i) {
                unite(v, i);
            }
        }
    }

    ctr = 0;
    dfs(0, smallIdx, smallStart, smallEnd);
    parSmall[0][0] = 0;

    for (int i = 1; i < 20; i++) {
        for (int j = 0; j < n; j++) {
            parSmall[j][i] = parSmall[parSmall[j][i-1]][i-1];
        }
    }

    for (int i = 0; i < n; i++) {
        pa[i] = i;
        sz[i] = 1;
        largest[i] = i;
        adj2[i].clear();
    }

    for (int i = 0; i < n; i++) {
        for (int v : adj[i]) {
            if (v < i) {
                unite2(v, i);
            }
        }
    }

    ctr = 0;
    dfs(n-1, largeIdx, largeStart, largeEnd);
    parLarge[n-1][0] = n-1;

    for (int i = 1; i < 20; i++) {
        for (int j = 0; j < n; j++) {
            parLarge[j][i] = parLarge[parLarge[j][i-1]][i-1];
        }
    }

    vector<int> A(S.size(), 0);

    for (int i = 0; i < (int)S.size(); i++) {
        int u = S[i];
        for (int j = 19; ~j; j--) {
            if (parSmall[u][j] >= L[i]) {
                u = parSmall[u][j];
            }
        }
        int smallLeft = smallStart[u], smallRight = smallEnd[u];

        u = E[i];
        for (int j = 19; ~j; j--) {
            if (parLarge[u][j] <= R[i]) {
                u = parLarge[u][j];
            }
        }
        int largeLeft = largeStart[u], largeRight = largeEnd[u];
        //cout << u << " " << smallLeft << " " << smallRight << " " << largeLeft << " " << largeRight << endl;


        for (int j = 0; j < n; j++) {
            if (largeLeft <= largeIdx[j] && largeIdx[j] <= largeRight) {
                if (smallLeft <= smallIdx[j] && smallIdx[j] <= smallRight) {
                    A[i] = 1;
                }
            }
        }
    }

    return A;
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9836 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 9 ms 9836 KB Output is correct
7 Correct 8 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9836 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 9 ms 9836 KB Output is correct
7 Correct 8 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct
10 Correct 46 ms 10732 KB Output is correct
11 Correct 58 ms 10732 KB Output is correct
12 Correct 45 ms 10732 KB Output is correct
13 Correct 46 ms 10988 KB Output is correct
14 Correct 47 ms 10988 KB Output is correct
15 Correct 42 ms 10860 KB Output is correct

Subtask #3
0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 4033 ms 71732 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9836 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 9 ms 9836 KB Output is correct
7 Correct 8 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct
10 Correct 46 ms 10732 KB Output is correct
11 Correct 58 ms 10732 KB Output is correct
12 Correct 45 ms 10732 KB Output is correct
13 Correct 46 ms 10988 KB Output is correct
14 Correct 47 ms 10988 KB Output is correct
15 Correct 42 ms 10860 KB Output is correct
16 Execution timed out 4033 ms 71732 KB Time limit exceeded
17 Halted 0 ms 0 KB -