oj.uz

답안 #546954

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
546954 2022-04-09T04:37:04 Z ngrace Jail (JOI22_jail) C++14
72 / 100
 5000 ms 603052 KB 
#include <vector>
#include <iostream>
#include <utility>
#include <set>
#include <algorithm>
using namespace std;
#define v vector
#define pii pair<int,int>
#define fi first
#define se second
 
int N,M;
int anc=20;
v<v<int>> adj;
v<int> depth;
v<v<int>> par;
void dfs(int cur, int from){
    if(depth[cur]!=-1) return;
    depth[cur]=depth[from]+1;
    par[cur][0]=from;
    for(int it:adj[cur]) dfs(it, cur);
}
bool is_anc(int cur, int other){
    for(int i=anc-1; i>=0; i--){
        if(depth[par[cur][i]]>=depth[other]) cur=par[cur][i];
    }
    if(cur==other) return true;
    return false;
}
 
int lca(int a, int b){
    if(depth[a]<depth[b]) swap(a,b);
    for(int i=anc-1; i>=0; i--){
        if(depth[par[a][i]]>=depth[b]) a=par[a][i];
    }
    if(a==b) return a;
    for(int i=anc-1; i>=0; i--){
        if(par[a][i]!=par[b][i]){
            a=par[a][i];
            b=par[b][i];
        }
    }
    return par[a][0];
}
 
v<bool> prevrec;
v<bool> vis;
bool find_cycle(int cur){
    if(!vis[cur]){
        vis[cur]=true;
        prevrec[cur]=true;
        for(int it:adj[cur]){
            if(!vis[it] && find_cycle(it)){
                return true;
            }
            else if(prevrec[it]){
                return true;
            }
        }
    }
    prevrec[cur]=false;
    return false;
}
 
int main(){
    int Q;
    cin>>Q;
    for(int q=0;q<Q;q++){
        cin>>N;
        adj=v<v<int>>(N);
        for(int i=0; i<N-1; i++){
            int a,b;
            cin>>a>>b;
            a--;
            b--;
            adj[a].push_back(b);
            adj[b].push_back(a);
        }
 
        depth=v<int>(N,-1);
        par=v<v<int>>(N,v<int>(anc,-1));
        dfs(0,0);
        for(int i=1; i<anc; i++){
            for(int j=0; j<N; j++){
                par[j][i]=par[par[j][i-1]][i-1];
            }
        }
 
        cin>>M;
        v<pii> rooms(M);
        v<int> ps(N,-1);
        v<int> pe(N,-1);
        for(int i=0; i<M; i++){
            cin>>rooms[i].fi>>rooms[i].se;
            rooms[i].fi--;
            rooms[i].se--;
            ps[rooms[i].fi]=i;
            pe[rooms[i].se]=i;
        }
 
        adj = v<v<int>>(M);
        for(int i=0; i<M; i++){
            int a=rooms[i].fi;
            int b=rooms[i].se;
            int l=lca(a,b);

            while(true){
                if(ps[a]!=-1 && ps[a]!=i) adj[ps[a]].push_back(i);
                if(pe[a]!=-1 && pe[a]!=i) adj[i].push_back(pe[a]);
                if(a==l) break;
                a=par[a][0];
            }
            while(b!=l){
                if(ps[b]!=-1 && ps[b]!=i) adj[ps[b]].push_back(i);
                if(pe[b]!=-1 && pe[b]!=i) adj[i].push_back(pe[b]);
                b=par[b][0];
            }
        }
 
 
        bool cycle=false;
        vis = v<bool>(M,false);
        prevrec = v<bool>(M,false);
        for(int i=0; i<M; i++){
            if(!vis[i] && find_cycle(i)){
                cycle=true;
                break;
            }
        }
 
        if(cycle) cout<<"No\n";
        else cout<<"Yes\n";
    }
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 34 ms 340 KB Output is correct
5 Correct 68 ms 212 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 4 ms 340 KB Output is correct
8 Correct 6 ms 340 KB Output is correct
9 Correct 170 ms 2736 KB Output is correct
10 Correct 760 ms 26136 KB Output is correct
11 Correct 15 ms 304 KB Output is correct
12 Correct 110 ms 420 KB Output is correct
13 Correct 246 ms 50828 KB Output is correct
14 Correct 274 ms 64924 KB Output is correct
15 Execution timed out 5095 ms 603052 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 3 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 3 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 3 ms 340 KB Output is correct
17 Correct 4 ms 340 KB Output is correct
18 Correct 3 ms 340 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 3 ms 340 KB Output is correct
21 Correct 3 ms 340 KB Output is correct
22 Correct 3 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 4 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 3 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct

Subtask #4
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 3 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 3 ms 340 KB Output is correct
17 Correct 4 ms 340 KB Output is correct
18 Correct 3 ms 340 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 3 ms 340 KB Output is correct
21 Correct 3 ms 340 KB Output is correct
22 Correct 3 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 4 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 3 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 6 ms 340 KB Output is correct
30 Correct 5 ms 340 KB Output is correct
31 Correct 5 ms 340 KB Output is correct
32 Correct 4 ms 340 KB Output is correct
33 Correct 3 ms 340 KB Output is correct
34 Correct 4 ms 340 KB Output is correct
35 Correct 5 ms 340 KB Output is correct
36 Correct 3 ms 340 KB Output is correct
37 Correct 3 ms 340 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 3 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 3 ms 340 KB Output is correct
17 Correct 4 ms 340 KB Output is correct
18 Correct 3 ms 340 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 3 ms 340 KB Output is correct
21 Correct 3 ms 340 KB Output is correct
22 Correct 3 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 4 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 3 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 6 ms 340 KB Output is correct
30 Correct 5 ms 340 KB Output is correct
31 Correct 5 ms 340 KB Output is correct
32 Correct 4 ms 340 KB Output is correct
33 Correct 3 ms 340 KB Output is correct
34 Correct 4 ms 340 KB Output is correct
35 Correct 5 ms 340 KB Output is correct
36 Correct 3 ms 340 KB Output is correct
37 Correct 3 ms 340 KB Output is correct
38 Correct 169 ms 2748 KB Output is correct
39 Correct 727 ms 26080 KB Output is correct
40 Correct 139 ms 2068 KB Output is correct
41 Correct 88 ms 2080 KB Output is correct
42 Correct 106 ms 2208 KB Output is correct
43 Correct 79 ms 2116 KB Output is correct
44 Correct 22 ms 596 KB Output is correct
45 Correct 129 ms 22348 KB Output is correct
46 Correct 131 ms 22484 KB Output is correct
47 Correct 318 ms 24140 KB Output is correct
48 Correct 320 ms 24204 KB Output is correct
49 Correct 148 ms 22476 KB Output is correct
50 Correct 142 ms 22440 KB Output is correct
51 Correct 114 ms 23012 KB Output is correct
52 Correct 111 ms 22936 KB Output is correct
53 Correct 26 ms 2156 KB Output is correct
54 Correct 150 ms 22340 KB Output is correct

Subtask #6
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 18 ms 312 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 4 ms 372 KB Output is correct
13 Correct 58 ms 320 KB Output is correct
14 Correct 84 ms 340 KB Output is correct
15 Correct 70 ms 340 KB Output is correct
16 Correct 151 ms 22940 KB Output is correct
17 Correct 271 ms 24384 KB Output is correct
18 Correct 538 ms 43720 KB Output is correct
19 Correct 167 ms 23132 KB Output is correct
20 Correct 165 ms 23160 KB Output is correct
21 Correct 166 ms 23108 KB Output is correct
22 Correct 235 ms 24452 KB Output is correct
23 Correct 221 ms 24396 KB Output is correct
24 Correct 219 ms 24372 KB Output is correct
25 Correct 220 ms 24492 KB Output is correct
26 Correct 221 ms 24468 KB Output is correct
27 Correct 309 ms 26520 KB Output is correct
28 Correct 295 ms 30820 KB Output is correct
29 Correct 345 ms 26780 KB Output is correct
30 Correct 213 ms 24508 KB Output is correct
31 Correct 219 ms 25164 KB Output is correct
32 Correct 225 ms 24444 KB Output is correct
33 Correct 228 ms 25204 KB Output is correct

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 34 ms 340 KB Output is correct
5 Correct 68 ms 212 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 4 ms 340 KB Output is correct
8 Correct 6 ms 340 KB Output is correct
9 Correct 170 ms 2736 KB Output is correct
10 Correct 760 ms 26136 KB Output is correct
11 Correct 15 ms 304 KB Output is correct
12 Correct 110 ms 420 KB Output is correct
13 Correct 246 ms 50828 KB Output is correct
14 Correct 274 ms 64924 KB Output is correct
15 Execution timed out 5095 ms 603052 KB Time limit exceeded
16 Halted 0 ms 0 KB -