oj.uz

답안 #315950

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
315950 2020-10-24T14:01:06 Z jhnah917 늑대인간 (IOI18_werewolf) C++14
100 / 100
 1703 ms 136580 KB 
#ifndef LOCAL
#include "werewolf.h"
#endif

#include <bits/stdc++.h>
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define compress(v) sort(all(v)), v.erase(unique(all(v)), v.end())
using namespace std;

typedef long long ll;

struct UnionFind{
    int par[202020];
    UnionFind(){ iota(par, par+202020, 0); }
    int find(int v){ return v == par[v] ? v : par[v] = find(par[v]); }
    bool merge(int P, int C){
        P = find(P); C = find(C);
        if(P == C) return false;
        par[C] = P; return true;
    }
} uf;

struct MergeSortTree{
    static const int sz = 1 << 18;
    vector<int> tree[1 << 19];
    void set(int x, int v){
        tree[x|sz].push_back(v);
    }
    void build(){
        for(int i=sz-1; i; i--) merge(all(tree[i << 1]), all(tree[i << 1 | 1]), back_inserter(tree[i]));
    }
    int query(int l, int r, int mn, int mx){
        l |= sz; r |= sz;
        while(l <= r){
            if(l & 1){
                auto it = lower_bound(all(tree[l]), mn);
                if(it != tree[l].end() && *it <= mx) return 1;
                l++;
            }
            if(~r & 1){
                auto it = lower_bound(all(tree[r]), mn);
                if(it != tree[r].end() && *it <= mx) return 1;
                r--;
            }
            l >>= 1; r >>= 1;
        }
        return 0;
    }
} seg;

struct Tree{
    int par[22][202020], in[202020], out[202020], pv;
    vector<int> g[202020];
    UnionFind uf;
    void addEdge(int P, int C){
        if(uf.find(P) == uf.find(C)) return;
        C = uf.find(C);
        par[0][C] = P; g[P].push_back(C);
        uf.merge(P, C);
    }
    void dfs(int v){
        in[v] = ++pv;
        for(auto i : g[v]) dfs(i);
        out[v] = pv;
    }
    void build(int n, int rt){
        dfs(rt); par[0][rt] = rt;
        for(int i=1; i<22; i++) for(int j=1; j<=n; j++) par[i][j] = par[i-1][par[i-1][j]];
    }
} tree1, tree2;

int n, m, q;
vector<int> g[202020];

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 = X.size(); q = L.size();
    for(auto &i : X) i++; for(auto &i : Y) i++; // I love 1-based!
    for(auto &i : S) i++; for(auto &i : E) i++; // I love 1-based!
    for(auto &i : L) i++; for(auto &i : R) i++; // I love 1-based!
    vector<int> ret;
    for(int i=0; i<m; i++){
        int s = X[i], e = Y[i];
        g[s].push_back(e); g[e].push_back(s);
    }
    for(int i=1; i<=n; i++){
        for(auto j : g[i]) if(j < i) tree1.addEdge(i, j);
    }
    for(int i=n; i>=1; i--){
        for(auto j : g[i]) if(i < j) tree2.addEdge(i, j);
    }
    tree1.build(n, n); tree2.build(n, 1);
    
    for(int i=1; i<=n; i++) seg.set(tree1.in[i], tree2.in[i]);
    seg.build();
    
    for(int i=0; i<q; i++){
        int t1 = E[i], t2 = S[i];
        for(int j=21; ~j; j--) if(tree1.par[j][t1] <= R[i]) t1 = tree1.par[j][t1];
        for(int j=21; ~j; j--) if(tree2.par[j][t2] >= L[i]) t2 = tree2.par[j][t2];
        ret.push_back(seg.query(tree1.in[t1], tree1.out[t1], tree2.in[t2], tree2.out[t2]));
    }
    return ret;
}

#ifdef LOCAL
int main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int N, M, Q; cin >> N >> M >> Q;
    vector<int> X, Y, S, E, L, R;
    for(int i=0; i<M; i++){
        int a, b; cin >> a >> b;
        X.push_back(a); Y.push_back(b);
    }
    for(int i=0; i<Q; i++){
        int a, b, c, d; cin >> a >> b >> c >> d;
        S.push_back(a); E.push_back(b);
        L.push_back(c); R.push_back(d);
    }
    auto res = check_validity(N, X, Y, S, E, L, R);
    for(auto i : res) cout << i << "\n";
}
#endif

Compilation message

werewolf.cpp: In function 'std::vector<int> check_validity(int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
werewolf.cpp:79:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   79 |     for(auto &i : X) i++; for(auto &i : Y) i++; // I love 1-based!
      |     ^~~
werewolf.cpp:79:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   79 |     for(auto &i : X) i++; for(auto &i : Y) i++; // I love 1-based!
      |                           ^~~
werewolf.cpp:80:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   80 |     for(auto &i : S) i++; for(auto &i : E) i++; // I love 1-based!
      |     ^~~
werewolf.cpp:80:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   80 |     for(auto &i : S) i++; for(auto &i : E) i++; // I love 1-based!
      |                           ^~~
werewolf.cpp:81:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   81 |     for(auto &i : L) i++; for(auto &i : R) i++; // I love 1-based!
      |     ^~~
werewolf.cpp:81:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   81 |     for(auto &i : L) i++; for(auto &i : R) i++; // I love 1-based!
      |                           ^~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 29568 KB Output is correct
2 Correct 21 ms 29568 KB Output is correct
3 Correct 21 ms 29568 KB Output is correct
4 Correct 21 ms 29440 KB Output is correct
5 Correct 21 ms 29568 KB Output is correct
6 Correct 21 ms 29568 KB Output is correct
7 Correct 21 ms 29568 KB Output is correct
8 Correct 21 ms 29564 KB Output is correct
9 Correct 21 ms 29568 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 29568 KB Output is correct
2 Correct 21 ms 29568 KB Output is correct
3 Correct 21 ms 29568 KB Output is correct
4 Correct 21 ms 29440 KB Output is correct
5 Correct 21 ms 29568 KB Output is correct
6 Correct 21 ms 29568 KB Output is correct
7 Correct 21 ms 29568 KB Output is correct
8 Correct 21 ms 29564 KB Output is correct
9 Correct 21 ms 29568 KB Output is correct
10 Correct 30 ms 31032 KB Output is correct
11 Correct 30 ms 30976 KB Output is correct
12 Correct 29 ms 30976 KB Output is correct
13 Correct 30 ms 31104 KB Output is correct
14 Correct 30 ms 31096 KB Output is correct
15 Correct 31 ms 31096 KB Output is correct

Subtask #3
34.0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1501 ms 125320 KB Output is correct
2 Correct 1207 ms 128936 KB Output is correct
3 Correct 1238 ms 126636 KB Output is correct
4 Correct 1416 ms 125500 KB Output is correct
5 Correct 1503 ms 125628 KB Output is correct
6 Correct 1593 ms 125628 KB Output is correct
7 Correct 1451 ms 125372 KB Output is correct
8 Correct 996 ms 128940 KB Output is correct
9 Correct 840 ms 126592 KB Output is correct
10 Correct 611 ms 125608 KB Output is correct
11 Correct 660 ms 125608 KB Output is correct
12 Correct 835 ms 125372 KB Output is correct
13 Correct 1359 ms 134196 KB Output is correct
14 Correct 1364 ms 134324 KB Output is correct
15 Correct 1361 ms 134332 KB Output is correct
16 Correct 1371 ms 134204 KB Output is correct
17 Correct 1440 ms 125372 KB Output is correct

Subtask #4
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 29568 KB Output is correct
2 Correct 21 ms 29568 KB Output is correct
3 Correct 21 ms 29568 KB Output is correct
4 Correct 21 ms 29440 KB Output is correct
5 Correct 21 ms 29568 KB Output is correct
6 Correct 21 ms 29568 KB Output is correct
7 Correct 21 ms 29568 KB Output is correct
8 Correct 21 ms 29564 KB Output is correct
9 Correct 21 ms 29568 KB Output is correct
10 Correct 30 ms 31032 KB Output is correct
11 Correct 30 ms 30976 KB Output is correct
12 Correct 29 ms 30976 KB Output is correct
13 Correct 30 ms 31104 KB Output is correct
14 Correct 30 ms 31096 KB Output is correct
15 Correct 31 ms 31096 KB Output is correct
16 Correct 1501 ms 125320 KB Output is correct
17 Correct 1207 ms 128936 KB Output is correct
18 Correct 1238 ms 126636 KB Output is correct
19 Correct 1416 ms 125500 KB Output is correct
20 Correct 1503 ms 125628 KB Output is correct
21 Correct 1593 ms 125628 KB Output is correct
22 Correct 1451 ms 125372 KB Output is correct
23 Correct 996 ms 128940 KB Output is correct
24 Correct 840 ms 126592 KB Output is correct
25 Correct 611 ms 125608 KB Output is correct
26 Correct 660 ms 125608 KB Output is correct
27 Correct 835 ms 125372 KB Output is correct
28 Correct 1359 ms 134196 KB Output is correct
29 Correct 1364 ms 134324 KB Output is correct
30 Correct 1361 ms 134332 KB Output is correct
31 Correct 1371 ms 134204 KB Output is correct
32 Correct 1440 ms 125372 KB Output is correct
33 Correct 1604 ms 125868 KB Output is correct
34 Correct 414 ms 61436 KB Output is correct
35 Correct 1516 ms 128572 KB Output is correct
36 Correct 1560 ms 126380 KB Output is correct
37 Correct 1527 ms 128044 KB Output is correct
38 Correct 1560 ms 126760 KB Output is correct
39 Correct 1703 ms 136328 KB Output is correct
40 Correct 1412 ms 136276 KB Output is correct
41 Correct 974 ms 127344 KB Output is correct
42 Correct 664 ms 126252 KB Output is correct
43 Correct 1186 ms 134024 KB Output is correct
44 Correct 1303 ms 127792 KB Output is correct
45 Correct 918 ms 136580 KB Output is correct
46 Correct 891 ms 136236 KB Output is correct
47 Correct 1377 ms 134440 KB Output is correct
48 Correct 1361 ms 134268 KB Output is correct
49 Correct 1401 ms 134464 KB Output is correct
50 Correct 1360 ms 134588 KB Output is correct
51 Correct 1225 ms 136124 KB Output is correct
52 Correct 1198 ms 136384 KB Output is correct