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답안 #567220

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
567220 2022-05-23T09:27:21 Z dantoh000 Jail (JOI22_jail) C++14
66 / 100
 2117 ms 27412 KB 
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> ii;
int q;
int n,m;
int s[120005], t[120005];
int p[120005][18];
int d[120005];
vector<int> G2[120005];
vector<int> G[120005];
int vis[120005];
vector<ii> K;
int lca(int x, int y){
    ///printf("LCA %d %d\n",x,y);
    if (d[x] > d[y]) swap(x,y);
    int diff = d[y]-d[x];
    for (int k = 0; k < 18; k++){
        if (diff>>k&1) {
            y = p[y][k];
        }
    }
    if (x == y) return x;
    for (int k = 17; k >= 0; k--){
        if (p[x][k] && p[y][k] && p[x][k] != p[y][k]){
            x = p[x][k];
            y = p[y][k];
        }
    }
    assert(p[x][0] == p[y][0]);
    return p[x][0];
}
void dfs(int u, int p_){
    p[u][0] = p_;
    for (auto v:  G[u]){
        if (v == p_) continue;
        d[v] = d[u]+1;
        dfs(v,u);

    }
}
bool check(int x, int y, int z){
    int r = lca(x,y);
    return (lca(r,z) == r) && (lca(x,z) == z || lca(y,z) == z);
}
bool dfs2(int u){
    vis[u] = 2;
    bool can = true;
    for (auto v : G2[u]){
        if (vis[v] == 2) return false;
        else if (vis[v] == 0){
            can &= dfs2(v);
        };
    }
    vis[u] = 1;
    return can;
}
int main(){
    scanf("%d",&q);
    while (q--){
        scanf("%d",&n);
        for (int i = 1; i <= n; i++) G[i].clear();
        for (int i = 1,a,b; i < n; i++){
            scanf("%d%d",&a,&b);
            G[a].push_back(b);
            G[b].push_back(a);
        }
        scanf("%d",&m);
        for (int i = 0; i < m; i++){
            scanf("%d%d",&s[i],&t[i]);
        }
        if (m <= 500 && q <= 20){
            d[1] = 0;
            dfs(1,0);
            for (int k = 1; k < 18; k++){
                for (int i = 1; i <= n; i++){
                    p[i][k] = p[p[i][k-1]][k-1];
                }
            }
            for (int i = 0; i < m; i++) G2[i].clear();
            for (int i = 0; i < m; i++){
                for (int j = 0; j < m; j++){
                    if (i == j) continue;
                    if (check(s[i], t[i], s[j])){
                        ///printf("%d before %d\n",j,i);
                        G2[i].push_back(j);
                    }
                    if (check(s[i], t[i], t[j])){
                        ///printf("%d before %d\n",i,j);
                        G2[j].push_back(i);
                    }
                }
            }
            bool can = true;
            fill(vis,vis+m, 0);
            for (int i = 0; i < m; i++){
                if (vis[i] == 0){
                    can &= dfs2(i);
                }
            }
            printf("%s\n",can?"Yes":"No");
        }
        else{
            K.clear();
            for (int i = 0; i < m; i++){
                K.push_back({s[i],t[i]});
            }
            sort(K.begin(),K.end());
            bool can = true;
            for (int i = 1; i < m; i++){
                if (K[i].second < K[i-1].second) can = false;
            }
            printf("%s\n",can?"Yes":"No");
        }


    }

}

Compilation message

jail.cpp: In function 'int main()':
jail.cpp:58:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |     scanf("%d",&q);
      |     ~~~~~^~~~~~~~~
jail.cpp:60:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         scanf("%d",&n);
      |         ~~~~~^~~~~~~~~
jail.cpp:63:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |             scanf("%d%d",&a,&b);
      |             ~~~~~^~~~~~~~~~~~~~
jail.cpp:67:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         scanf("%d",&m);
      |         ~~~~~^~~~~~~~~
jail.cpp:69:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |             scanf("%d%d",&s[i],&t[i]);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 3 ms 5972 KB Output is correct
4 Correct 12 ms 5968 KB Output is correct
5 Correct 23 ms 5964 KB Output is correct
6 Correct 4 ms 5972 KB Output is correct
7 Correct 4 ms 6008 KB Output is correct
8 Correct 54 ms 6008 KB Output is correct
9 Correct 1658 ms 8884 KB Output is correct
10 Correct 136 ms 27412 KB Output is correct
11 Correct 8 ms 5972 KB Output is correct
12 Correct 62 ms 6232 KB Output is correct
13 Correct 49 ms 11132 KB Output is correct
14 Correct 50 ms 11008 KB Output is correct
15 Correct 51 ms 10944 KB Output is correct
16 Correct 68 ms 11840 KB Output is correct
17 Correct 49 ms 10952 KB Output is correct
18 Correct 61 ms 11880 KB Output is correct
19 Correct 50 ms 10904 KB Output is correct
20 Correct 56 ms 10952 KB Output is correct
21 Correct 51 ms 10956 KB Output is correct
22 Correct 53 ms 10936 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5972 KB Output is correct
2 Correct 3 ms 5880 KB Output is correct
3 Correct 4 ms 5972 KB Output is correct
4 Correct 4 ms 5972 KB Output is correct
5 Correct 4 ms 5972 KB Output is correct
6 Correct 4 ms 5972 KB Output is correct
7 Correct 5 ms 5956 KB Output is correct
8 Correct 4 ms 5972 KB Output is correct
9 Correct 4 ms 5972 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 4 ms 5972 KB Output is correct
12 Correct 3 ms 5972 KB Output is correct
13 Correct 3 ms 5972 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5972 KB Output is correct
2 Correct 3 ms 5880 KB Output is correct
3 Correct 4 ms 5972 KB Output is correct
4 Correct 4 ms 5972 KB Output is correct
5 Correct 4 ms 5972 KB Output is correct
6 Correct 4 ms 5972 KB Output is correct
7 Correct 5 ms 5956 KB Output is correct
8 Correct 4 ms 5972 KB Output is correct
9 Correct 4 ms 5972 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 4 ms 5972 KB Output is correct
12 Correct 3 ms 5972 KB Output is correct
13 Correct 3 ms 5972 KB Output is correct
14 Correct 3 ms 5972 KB Output is correct
15 Correct 3 ms 5844 KB Output is correct
16 Correct 4 ms 5984 KB Output is correct
17 Correct 4 ms 6004 KB Output is correct
18 Correct 4 ms 5972 KB Output is correct
19 Correct 3 ms 5844 KB Output is correct
20 Correct 5 ms 5956 KB Output is correct
21 Correct 4 ms 5972 KB Output is correct
22 Correct 4 ms 5972 KB Output is correct
23 Correct 4 ms 5844 KB Output is correct
24 Correct 4 ms 5972 KB Output is correct
25 Correct 5 ms 5904 KB Output is correct
26 Correct 5 ms 5972 KB Output is correct
27 Correct 4 ms 5972 KB Output is correct
28 Correct 4 ms 5844 KB Output is correct

Subtask #4
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5972 KB Output is correct
2 Correct 3 ms 5880 KB Output is correct
3 Correct 4 ms 5972 KB Output is correct
4 Correct 4 ms 5972 KB Output is correct
5 Correct 4 ms 5972 KB Output is correct
6 Correct 4 ms 5972 KB Output is correct
7 Correct 5 ms 5956 KB Output is correct
8 Correct 4 ms 5972 KB Output is correct
9 Correct 4 ms 5972 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 4 ms 5972 KB Output is correct
12 Correct 3 ms 5972 KB Output is correct
13 Correct 3 ms 5972 KB Output is correct
14 Correct 3 ms 5972 KB Output is correct
15 Correct 3 ms 5844 KB Output is correct
16 Correct 4 ms 5984 KB Output is correct
17 Correct 4 ms 6004 KB Output is correct
18 Correct 4 ms 5972 KB Output is correct
19 Correct 3 ms 5844 KB Output is correct
20 Correct 5 ms 5956 KB Output is correct
21 Correct 4 ms 5972 KB Output is correct
22 Correct 4 ms 5972 KB Output is correct
23 Correct 4 ms 5844 KB Output is correct
24 Correct 4 ms 5972 KB Output is correct
25 Correct 5 ms 5904 KB Output is correct
26 Correct 5 ms 5972 KB Output is correct
27 Correct 4 ms 5972 KB Output is correct
28 Correct 4 ms 5844 KB Output is correct
29 Correct 53 ms 6040 KB Output is correct
30 Correct 36 ms 5972 KB Output is correct
31 Correct 35 ms 6152 KB Output is correct
32 Correct 22 ms 5996 KB Output is correct
33 Correct 7 ms 5972 KB Output is correct
34 Correct 81 ms 6004 KB Output is correct
35 Correct 93 ms 5972 KB Output is correct
36 Correct 57 ms 5988 KB Output is correct
37 Correct 34 ms 6004 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5972 KB Output is correct
2 Correct 3 ms 5880 KB Output is correct
3 Correct 4 ms 5972 KB Output is correct
4 Correct 4 ms 5972 KB Output is correct
5 Correct 4 ms 5972 KB Output is correct
6 Correct 4 ms 5972 KB Output is correct
7 Correct 5 ms 5956 KB Output is correct
8 Correct 4 ms 5972 KB Output is correct
9 Correct 4 ms 5972 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 4 ms 5972 KB Output is correct
12 Correct 3 ms 5972 KB Output is correct
13 Correct 3 ms 5972 KB Output is correct
14 Correct 3 ms 5972 KB Output is correct
15 Correct 3 ms 5844 KB Output is correct
16 Correct 4 ms 5984 KB Output is correct
17 Correct 4 ms 6004 KB Output is correct
18 Correct 4 ms 5972 KB Output is correct
19 Correct 3 ms 5844 KB Output is correct
20 Correct 5 ms 5956 KB Output is correct
21 Correct 4 ms 5972 KB Output is correct
22 Correct 4 ms 5972 KB Output is correct
23 Correct 4 ms 5844 KB Output is correct
24 Correct 4 ms 5972 KB Output is correct
25 Correct 5 ms 5904 KB Output is correct
26 Correct 5 ms 5972 KB Output is correct
27 Correct 4 ms 5972 KB Output is correct
28 Correct 4 ms 5844 KB Output is correct
29 Correct 53 ms 6040 KB Output is correct
30 Correct 36 ms 5972 KB Output is correct
31 Correct 35 ms 6152 KB Output is correct
32 Correct 22 ms 5996 KB Output is correct
33 Correct 7 ms 5972 KB Output is correct
34 Correct 81 ms 6004 KB Output is correct
35 Correct 93 ms 5972 KB Output is correct
36 Correct 57 ms 5988 KB Output is correct
37 Correct 34 ms 6004 KB Output is correct
38 Correct 1634 ms 9000 KB Output is correct
39 Correct 138 ms 27360 KB Output is correct
40 Correct 2117 ms 8160 KB Output is correct
41 Correct 1910 ms 6752 KB Output is correct
42 Correct 1677 ms 8152 KB Output is correct
43 Correct 42 ms 6740 KB Output is correct
44 Correct 1821 ms 6416 KB Output is correct
45 Correct 227 ms 18792 KB Output is correct
46 Correct 226 ms 18664 KB Output is correct
47 Correct 252 ms 22372 KB Output is correct
48 Correct 256 ms 22508 KB Output is correct
49 Correct 235 ms 18776 KB Output is correct
50 Correct 249 ms 18708 KB Output is correct
51 Correct 72 ms 19888 KB Output is correct
52 Correct 77 ms 19796 KB Output is correct
53 Correct 1277 ms 6912 KB Output is correct
54 Correct 174 ms 18620 KB Output is correct

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5968 KB Output is correct
3 Correct 3 ms 5972 KB Output is correct
4 Correct 3 ms 5844 KB Output is correct
5 Correct 9 ms 5972 KB Output is correct
6 Correct 6 ms 5972 KB Output is correct
7 Correct 5 ms 5972 KB Output is correct
8 Correct 3 ms 5952 KB Output is correct
9 Correct 5 ms 5844 KB Output is correct
10 Correct 4 ms 5872 KB Output is correct
11 Correct 5 ms 5972 KB Output is correct
12 Correct 61 ms 5972 KB Output is correct
13 Incorrect 128 ms 6160 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 3 ms 5972 KB Output is correct
4 Correct 12 ms 5968 KB Output is correct
5 Correct 23 ms 5964 KB Output is correct
6 Correct 4 ms 5972 KB Output is correct
7 Correct 4 ms 6008 KB Output is correct
8 Correct 54 ms 6008 KB Output is correct
9 Correct 1658 ms 8884 KB Output is correct
10 Correct 136 ms 27412 KB Output is correct
11 Correct 8 ms 5972 KB Output is correct
12 Correct 62 ms 6232 KB Output is correct
13 Correct 49 ms 11132 KB Output is correct
14 Correct 50 ms 11008 KB Output is correct
15 Correct 51 ms 10944 KB Output is correct
16 Correct 68 ms 11840 KB Output is correct
17 Correct 49 ms 10952 KB Output is correct
18 Correct 61 ms 11880 KB Output is correct
19 Correct 50 ms 10904 KB Output is correct
20 Correct 56 ms 10952 KB Output is correct
21 Correct 51 ms 10956 KB Output is correct
22 Correct 53 ms 10936 KB Output is correct
23 Correct 4 ms 5972 KB Output is correct
24 Correct 3 ms 5880 KB Output is correct
25 Correct 4 ms 5972 KB Output is correct
26 Correct 4 ms 5972 KB Output is correct
27 Correct 4 ms 5972 KB Output is correct
28 Correct 4 ms 5972 KB Output is correct
29 Correct 5 ms 5956 KB Output is correct
30 Correct 4 ms 5972 KB Output is correct
31 Correct 4 ms 5972 KB Output is correct
32 Correct 4 ms 5972 KB Output is correct
33 Correct 4 ms 5972 KB Output is correct
34 Correct 3 ms 5972 KB Output is correct
35 Correct 3 ms 5972 KB Output is correct
36 Correct 3 ms 5972 KB Output is correct
37 Correct 3 ms 5844 KB Output is correct
38 Correct 4 ms 5984 KB Output is correct
39 Correct 4 ms 6004 KB Output is correct
40 Correct 4 ms 5972 KB Output is correct
41 Correct 3 ms 5844 KB Output is correct
42 Correct 5 ms 5956 KB Output is correct
43 Correct 4 ms 5972 KB Output is correct
44 Correct 4 ms 5972 KB Output is correct
45 Correct 4 ms 5844 KB Output is correct
46 Correct 4 ms 5972 KB Output is correct
47 Correct 5 ms 5904 KB Output is correct
48 Correct 5 ms 5972 KB Output is correct
49 Correct 4 ms 5972 KB Output is correct
50 Correct 4 ms 5844 KB Output is correct
51 Correct 53 ms 6040 KB Output is correct
52 Correct 36 ms 5972 KB Output is correct
53 Correct 35 ms 6152 KB Output is correct
54 Correct 22 ms 5996 KB Output is correct
55 Correct 7 ms 5972 KB Output is correct
56 Correct 81 ms 6004 KB Output is correct
57 Correct 93 ms 5972 KB Output is correct
58 Correct 57 ms 5988 KB Output is correct
59 Correct 34 ms 6004 KB Output is correct
60 Correct 1634 ms 9000 KB Output is correct
61 Correct 138 ms 27360 KB Output is correct
62 Correct 2117 ms 8160 KB Output is correct
63 Correct 1910 ms 6752 KB Output is correct
64 Correct 1677 ms 8152 KB Output is correct
65 Correct 42 ms 6740 KB Output is correct
66 Correct 1821 ms 6416 KB Output is correct
67 Correct 227 ms 18792 KB Output is correct
68 Correct 226 ms 18664 KB Output is correct
69 Correct 252 ms 22372 KB Output is correct
70 Correct 256 ms 22508 KB Output is correct
71 Correct 235 ms 18776 KB Output is correct
72 Correct 249 ms 18708 KB Output is correct
73 Correct 72 ms 19888 KB Output is correct
74 Correct 77 ms 19796 KB Output is correct
75 Correct 1277 ms 6912 KB Output is correct
76 Correct 174 ms 18620 KB Output is correct
77 Correct 3 ms 5844 KB Output is correct
78 Correct 3 ms 5968 KB Output is correct
79 Correct 3 ms 5972 KB Output is correct
80 Correct 3 ms 5844 KB Output is correct
81 Correct 9 ms 5972 KB Output is correct
82 Correct 6 ms 5972 KB Output is correct
83 Correct 5 ms 5972 KB Output is correct
84 Correct 3 ms 5952 KB Output is correct
85 Correct 5 ms 5844 KB Output is correct
86 Correct 4 ms 5872 KB Output is correct
87 Correct 5 ms 5972 KB Output is correct
88 Correct 61 ms 5972 KB Output is correct
89 Incorrect 128 ms 6160 KB Output isn't correct
90 Halted 0 ms 0 KB -