oj.uz

답안 #567216

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
567216 2022-05-23T09:25:14 Z dantoh000 Jail (JOI22_jail) C++14
61 / 100
 2266 ms 27716 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 < n; i++){
                K.push_back({s[i],t[i]});
            }
            sort(K.begin(),K.end());
            bool can = true;
            for (int i = 1; i < n; 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
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 4 ms 5972 KB Output is correct
3 Correct 3 ms 5972 KB Output is correct
4 Correct 13 ms 6100 KB Output is correct
5 Correct 26 ms 6228 KB Output is correct
6 Correct 6 ms 5972 KB Output is correct
7 Correct 6 ms 5924 KB Output is correct
8 Correct 62 ms 6152 KB Output is correct
9 Correct 1800 ms 9144 KB Output is correct
10 Correct 147 ms 27716 KB Output is correct
11 Incorrect 10 ms 6068 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5880 KB Output is correct
2 Correct 4 ms 5948 KB Output is correct
3 Correct 5 ms 5972 KB Output is correct
4 Correct 5 ms 5972 KB Output is correct
5 Correct 5 ms 5960 KB Output is correct
6 Correct 4 ms 5964 KB Output is correct
7 Correct 4 ms 5972 KB Output is correct
8 Correct 5 ms 5972 KB Output is correct
9 Correct 5 ms 6024 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 5 ms 5964 KB Output is correct
12 Correct 4 ms 5972 KB Output is correct
13 Correct 6 ms 5972 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5880 KB Output is correct
2 Correct 4 ms 5948 KB Output is correct
3 Correct 5 ms 5972 KB Output is correct
4 Correct 5 ms 5972 KB Output is correct
5 Correct 5 ms 5960 KB Output is correct
6 Correct 4 ms 5964 KB Output is correct
7 Correct 4 ms 5972 KB Output is correct
8 Correct 5 ms 5972 KB Output is correct
9 Correct 5 ms 6024 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 5 ms 5964 KB Output is correct
12 Correct 4 ms 5972 KB Output is correct
13 Correct 6 ms 5972 KB Output is correct
14 Correct 4 ms 5972 KB Output is correct
15 Correct 4 ms 5972 KB Output is correct
16 Correct 5 ms 5972 KB Output is correct
17 Correct 5 ms 5972 KB Output is correct
18 Correct 5 ms 5972 KB Output is correct
19 Correct 4 ms 5952 KB Output is correct
20 Correct 4 ms 5972 KB Output is correct
21 Correct 5 ms 6016 KB Output is correct
22 Correct 5 ms 5972 KB Output is correct
23 Correct 4 ms 5948 KB Output is correct
24 Correct 4 ms 5948 KB Output is correct
25 Correct 5 ms 5972 KB Output is correct
26 Correct 4 ms 5948 KB Output is correct
27 Correct 5 ms 6008 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 5880 KB Output is correct
2 Correct 4 ms 5948 KB Output is correct
3 Correct 5 ms 5972 KB Output is correct
4 Correct 5 ms 5972 KB Output is correct
5 Correct 5 ms 5960 KB Output is correct
6 Correct 4 ms 5964 KB Output is correct
7 Correct 4 ms 5972 KB Output is correct
8 Correct 5 ms 5972 KB Output is correct
9 Correct 5 ms 6024 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 5 ms 5964 KB Output is correct
12 Correct 4 ms 5972 KB Output is correct
13 Correct 6 ms 5972 KB Output is correct
14 Correct 4 ms 5972 KB Output is correct
15 Correct 4 ms 5972 KB Output is correct
16 Correct 5 ms 5972 KB Output is correct
17 Correct 5 ms 5972 KB Output is correct
18 Correct 5 ms 5972 KB Output is correct
19 Correct 4 ms 5952 KB Output is correct
20 Correct 4 ms 5972 KB Output is correct
21 Correct 5 ms 6016 KB Output is correct
22 Correct 5 ms 5972 KB Output is correct
23 Correct 4 ms 5948 KB Output is correct
24 Correct 4 ms 5948 KB Output is correct
25 Correct 5 ms 5972 KB Output is correct
26 Correct 4 ms 5948 KB Output is correct
27 Correct 5 ms 6008 KB Output is correct
28 Correct 4 ms 5844 KB Output is correct
29 Correct 60 ms 6056 KB Output is correct
30 Correct 40 ms 6020 KB Output is correct
31 Correct 35 ms 6044 KB Output is correct
32 Correct 21 ms 5972 KB Output is correct
33 Correct 7 ms 5988 KB Output is correct
34 Correct 84 ms 5972 KB Output is correct
35 Correct 100 ms 6092 KB Output is correct
36 Correct 63 ms 5972 KB Output is correct
37 Correct 37 ms 6020 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5880 KB Output is correct
2 Correct 4 ms 5948 KB Output is correct
3 Correct 5 ms 5972 KB Output is correct
4 Correct 5 ms 5972 KB Output is correct
5 Correct 5 ms 5960 KB Output is correct
6 Correct 4 ms 5964 KB Output is correct
7 Correct 4 ms 5972 KB Output is correct
8 Correct 5 ms 5972 KB Output is correct
9 Correct 5 ms 6024 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 5 ms 5964 KB Output is correct
12 Correct 4 ms 5972 KB Output is correct
13 Correct 6 ms 5972 KB Output is correct
14 Correct 4 ms 5972 KB Output is correct
15 Correct 4 ms 5972 KB Output is correct
16 Correct 5 ms 5972 KB Output is correct
17 Correct 5 ms 5972 KB Output is correct
18 Correct 5 ms 5972 KB Output is correct
19 Correct 4 ms 5952 KB Output is correct
20 Correct 4 ms 5972 KB Output is correct
21 Correct 5 ms 6016 KB Output is correct
22 Correct 5 ms 5972 KB Output is correct
23 Correct 4 ms 5948 KB Output is correct
24 Correct 4 ms 5948 KB Output is correct
25 Correct 5 ms 5972 KB Output is correct
26 Correct 4 ms 5948 KB Output is correct
27 Correct 5 ms 6008 KB Output is correct
28 Correct 4 ms 5844 KB Output is correct
29 Correct 60 ms 6056 KB Output is correct
30 Correct 40 ms 6020 KB Output is correct
31 Correct 35 ms 6044 KB Output is correct
32 Correct 21 ms 5972 KB Output is correct
33 Correct 7 ms 5988 KB Output is correct
34 Correct 84 ms 5972 KB Output is correct
35 Correct 100 ms 6092 KB Output is correct
36 Correct 63 ms 5972 KB Output is correct
37 Correct 37 ms 6020 KB Output is correct
38 Correct 1752 ms 9160 KB Output is correct
39 Correct 157 ms 27688 KB Output is correct
40 Correct 2266 ms 8208 KB Output is correct
41 Correct 2035 ms 6996 KB Output is correct
42 Correct 1770 ms 8536 KB Output is correct
43 Correct 49 ms 6988 KB Output is correct
44 Correct 1939 ms 6476 KB Output is correct
45 Correct 245 ms 19080 KB Output is correct
46 Correct 294 ms 18956 KB Output is correct
47 Correct 262 ms 22656 KB Output is correct
48 Correct 283 ms 22800 KB Output is correct
49 Correct 317 ms 19120 KB Output is correct
50 Correct 281 ms 19288 KB Output is correct
51 Correct 91 ms 19952 KB Output is correct
52 Correct 73 ms 20184 KB Output is correct
53 Correct 1376 ms 7036 KB Output is correct
54 Correct 221 ms 19020 KB Output is correct

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5972 KB Output is correct
2 Correct 4 ms 5948 KB Output is correct
3 Correct 4 ms 5956 KB Output is correct
4 Correct 4 ms 5844 KB Output is correct
5 Incorrect 8 ms 5844 KB Output isn't correct
6 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 4 ms 5972 KB Output is correct
3 Correct 3 ms 5972 KB Output is correct
4 Correct 13 ms 6100 KB Output is correct
5 Correct 26 ms 6228 KB Output is correct
6 Correct 6 ms 5972 KB Output is correct
7 Correct 6 ms 5924 KB Output is correct
8 Correct 62 ms 6152 KB Output is correct
9 Correct 1800 ms 9144 KB Output is correct
10 Correct 147 ms 27716 KB Output is correct
11 Incorrect 10 ms 6068 KB Output isn't correct
12 Halted 0 ms 0 KB -