oj.uz

답안 #819285

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
819285 2023-08-10T08:56:10 Z vjudge1 늑대인간 (IOI18_werewolf) C++17
15 / 100
 1388 ms 58652 KB 
#include<bits/stdc++.h>
#include "werewolf.h"

using namespace std;

template<typename T>
struct SparseTable {
    int len;
    vector<vector<T>> st;
    T (*F) (T, T);
    void init(vector<T> &a, T (*f) (T, T)) {
        F = f;
        len = (int)a.size();
        int mxpw = 32 - __builtin_clz(len);
        st.resize(mxpw);
        st[0] = a;
        for(int k = 1; k < mxpw; k++) {
            st[k].resize(len - (1 << k));
            for(int i = 0; i < (int)st[k].size(); i++) 
                st[k][i] = F(st[k - 1][i], st[k - 1][i + (1 << (k - 1))]);
        }
    }
    T get(int l, int r) {
        if(l > r || l < 0 || r >= len) {
            cerr << "Wrong range in Sparse Table\n";
            cerr << "size = " << len << '\n';
            cerr << "range query: " << '[' << l << ", " << r <<  ']' << '\n';
            exit(1);
        }
        int mxpw = 31 - __builtin_clz(r - l + 1);
        return F(st[mxpw][l], st[mxpw][r - (1 << mxpw) + 1]);
    }
};

int n, m, q;
const int N = 2e5 + 10;
vector<int> g[N];

vector<int> cnt;
vector<bool> us;
void dfs(int s, int l, int r) {
    us[s] = 1;
    cnt[s]++;
    for(int to : g[s]) {
        if(us[to] || to > r || to < l) continue;
        dfs(to, l, r);
    }
}

vector<int> order;
int tin[N];

void tour(int s, int p) {
    tin[s] = (int)order.size();
    order.push_back(s);
    for(int to : g[s]) 
        if(to != p) 
            tour(to, s);
}

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

    if(n <= 3000 && q <= 3000 && m <= 6000) {
        for(int i = 0; i < q; i++) {
            cnt.assign(n, 0);
            us.assign(n, false);
            dfs(S[i], L[i], n - 1);
            us.assign(n, false);
            dfs(E[i], 0, R[i]);
            if(*max_element(cnt.begin(), cnt.end()) > 1)
                res[i] = 1;
        }
        return res;
    }
    int root = 0;
    while(root < n && g[root].size() > 1) root++;
    tour(root, root);
    if((int)order.size() < n) {
        exit(1);
    }
    SparseTable<int> mn, mx;
    mn.init(order, [](int a, int b) {return (a > b ? b : a);});
    mx.init(order, [](int a, int b) {return (a < b ? b : a);});

    for(int i = 0; i < q; i++) {
        int x = tin[S[i]], y = tin[E[i]], lb, rb;
        int sl, sr, el, er;
        lb = x, rb = n;
        while(rb - lb > 1) {
            int mid = (lb + rb) / 2;
            if(mn.get(x, mid) >= L[i]) lb = mid;
            else rb = mid;
        }
        sr = lb;
        
        lb = -1, rb = x;
        while(rb - lb > 1) {
            int mid = (lb + rb) / 2;
            if(mn.get(mid, x) >= L[i]) rb = mid;
            else lb = mid;
        }
        sl = rb;
        
        lb = y, rb = n;
        while(rb - lb > 1) {
            int mid = (lb + rb) / 2;
            if(mx.get(y, mid) <= R[i]) lb = mid;
            else rb = mid;
        }
        er = lb;
        
        lb = -1, rb = y;
        while(rb - lb > 1) {
            int mid = (lb + rb) / 2;
            if(mx.get(mid, y) <= R[i]) rb = mid;
            else lb = mid;
        }
        el = rb;
        int ll = max(sl, el), rr = min(sr, er);
        
        res[i] = (ll <= rr);
    }
    return res;
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 205 ms 5268 KB Output is correct
11 Correct 111 ms 5236 KB Output is correct
12 Correct 21 ms 5392 KB Output is correct
13 Correct 227 ms 5284 KB Output is correct
14 Correct 141 ms 5204 KB Output is correct
15 Correct 180 ms 5392 KB Output is correct

Subtask #3
0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1388 ms 58648 KB Output is correct
2 Correct 470 ms 58560 KB Output is correct
3 Incorrect 457 ms 58652 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 205 ms 5268 KB Output is correct
11 Correct 111 ms 5236 KB Output is correct
12 Correct 21 ms 5392 KB Output is correct
13 Correct 227 ms 5284 KB Output is correct
14 Correct 141 ms 5204 KB Output is correct
15 Correct 180 ms 5392 KB Output is correct
16 Correct 1388 ms 58648 KB Output is correct
17 Correct 470 ms 58560 KB Output is correct
18 Incorrect 457 ms 58652 KB Output isn't correct
19 Halted 0 ms 0 KB -