oj.uz

Submission #546969

# Submission time Handle Problem Language Result Execution time Memory
546969 2022-04-09T05:07:46 Z ngrace Jail (JOI22_jail) C++14
77 / 100
 5000 ms 516044 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;
v<int> ps;
v<int> pe;
v<v<int>> num;
void dfs(int cur, int from){
    if(depth[cur]!=-1) return;
    depth[cur]=depth[from]+1;
    par[cur][0]=from;
    if(ps[cur]!=-1) num[cur][0]++;
    if(pe[cur]!=-1) num[cur][0]++;
    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<set<int>> diadj;
v<bool> prevrec;
v<bool> vis;
bool find_cycle(int cur){
    if(!vis[cur]){
        vis[cur]=true;
        prevrec[cur]=true;
        for(int it:diadj[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);
        bool subone=true;
        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);
            if(a+1!=b) subone=false;
        }

        if(subone){
            cin>>M;
            v<pii> rooms(M);
            v<pii> rooms2(M);
            for(int i=0; i<M; i++){
                int a,b;
                cin>>a>>b;
                if(b>=a){
                    rooms.push_back({a,b});
                    rooms2.push_back({-a,b});
                    rooms2.push_back({-b,a});
                }
                else{
                    rooms.push_back({a,-b});
                    rooms.push_back({b,-a});
                    rooms2.push_back({-a,-b});
                }
            }
 
            sort(rooms.begin(), rooms.end());
            sort(rooms2.begin(),rooms2.end());
 
            pii cur={-1,-1};
            pii def={-1,-1};
            bool out=true;
            for(pii it:rooms){
                if(it.se<=0){
                    if(cur!=def && cur.se>=it.fi){
                        out=false;
                        break;
                    }
                }
                else{
                    if(it.se<cur.se){
                        out=false;
                        break;
                    }
                    cur=it;
                }
            }
 
            cur={1,1};
            def={1,1};
            for(pii it:rooms2){
                if(it.se>=0){
                    if(cur!=def && cur.se>=it.fi){
                        out=false;
                        break;
                    }
                }
                else{
                    if(it.se<cur.se && cur!=def){
                        out=false;
                        break;
                    }
                    cur=it;
                }
            }
 
            if(out) cout<<"Yes\n";
            else cout<<"No\n";
 
            continue;
        }
 
        cin>>M;
        v<pii> rooms(M);
        ps = v<int>(N,-1);
        pe = v<int>(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;
        }


        depth=v<int>(N,-1);
        par=v<v<int>>(N,v<int>(anc,-1));
        num=v<v<int>>(N,v<int>(anc,0));
        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];
                num[j][i]=num[par[j][i-1]][i-1]+num[j][i-1];
            }
        }


        bool cycle=false;
        diadj = v<set<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){
                for(int j=anc-1; j>=0; j--){
                    if(depth[par[a][j]]<depth[l]) continue;
                    if(num[a][j]==0) a=par[a][j];
                }
                if(ps[a]!=-1 && ps[a]!=i) diadj[ps[a]].insert(i);
                if(pe[a]!=-1 && pe[a]!=i) diadj[i].insert(pe[a]);
                if(a==l) break;
                a=par[a][0];
            }
            while(b!=l){
                for(int j=anc-1; j>=0; j--){
                    if(depth[par[b][j]]<=depth[l]) continue;
                    if(num[b][j]==0) b=par[b][j];
                }
                if(ps[b]!=-1 && ps[b]!=i) diadj[ps[b]].insert(i);
                if(pe[b]!=-1 && pe[b]!=i) diadj[i].insert(pe[b]);
                b=par[b][0];
            }

            
        }

        vis = v<bool>(M,false);
        prevrec = v<bool>(M,false);
        for(int i=0; i<M; i++){
            if(cycle) break;
            if(!vis[i] && find_cycle(i)){
                cycle=true;
                break;
            }
        }
 
        if(cycle) cout<<"No\n";
        else cout<<"Yes\n";
    }
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory 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 22 ms 212 KB Output is correct
5 Correct 47 ms 212 KB Output is correct
6 Correct 3 ms 212 KB Output is correct
7 Correct 3 ms 212 KB Output is correct
8 Correct 4 ms 212 KB Output is correct
9 Correct 81 ms 796 KB Output is correct
10 Correct 98 ms 6804 KB Output is correct
11 Correct 12 ms 308 KB Output is correct
12 Correct 68 ms 364 KB Output is correct
13 Correct 108 ms 9448 KB Output is correct
14 Correct 116 ms 9476 KB Output is correct
15 Correct 152 ms 9120 KB Output is correct
16 Correct 193 ms 12496 KB Output is correct
17 Correct 118 ms 9372 KB Output is correct
18 Correct 153 ms 12024 KB Output is correct
19 Correct 111 ms 9392 KB Output is correct
20 Correct 121 ms 10160 KB Output is correct
21 Correct 143 ms 9628 KB Output is correct
22 Correct 117 ms 9376 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 3 ms 212 KB Output is correct
4 Correct 4 ms 340 KB Output is correct
5 Correct 4 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 4 ms 356 KB Output is correct
8 Correct 4 ms 340 KB Output is correct
9 Correct 5 ms 340 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 4 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

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 3 ms 212 KB Output is correct
4 Correct 4 ms 340 KB Output is correct
5 Correct 4 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 4 ms 356 KB Output is correct
8 Correct 4 ms 340 KB Output is correct
9 Correct 5 ms 340 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 4 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 0 ms 212 KB Output is correct
16 Correct 3 ms 212 KB Output is correct
17 Correct 4 ms 340 KB Output is correct
18 Correct 4 ms 340 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 4 ms 340 KB Output is correct
21 Correct 4 ms 340 KB Output is correct
22 Correct 4 ms 392 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 5 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 4 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 3 ms 212 KB Output is correct
4 Correct 4 ms 340 KB Output is correct
5 Correct 4 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 4 ms 356 KB Output is correct
8 Correct 4 ms 340 KB Output is correct
9 Correct 5 ms 340 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 4 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 0 ms 212 KB Output is correct
16 Correct 3 ms 212 KB Output is correct
17 Correct 4 ms 340 KB Output is correct
18 Correct 4 ms 340 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 4 ms 340 KB Output is correct
21 Correct 4 ms 340 KB Output is correct
22 Correct 4 ms 392 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 5 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 4 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 4 ms 212 KB Output is correct
30 Correct 6 ms 340 KB Output is correct
31 Correct 8 ms 468 KB Output is correct
32 Correct 5 ms 340 KB Output is correct
33 Correct 4 ms 340 KB Output is correct
34 Correct 8 ms 436 KB Output is correct
35 Correct 27 ms 640 KB Output is correct
36 Correct 5 ms 340 KB Output is correct
37 Correct 4 ms 428 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 3 ms 212 KB Output is correct
4 Correct 4 ms 340 KB Output is correct
5 Correct 4 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 4 ms 356 KB Output is correct
8 Correct 4 ms 340 KB Output is correct
9 Correct 5 ms 340 KB Output is correct
10 Correct 4 ms 340 KB Output is correct
11 Correct 4 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 0 ms 212 KB Output is correct
16 Correct 3 ms 212 KB Output is correct
17 Correct 4 ms 340 KB Output is correct
18 Correct 4 ms 340 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 4 ms 340 KB Output is correct
21 Correct 4 ms 340 KB Output is correct
22 Correct 4 ms 392 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 5 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 4 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 4 ms 212 KB Output is correct
30 Correct 6 ms 340 KB Output is correct
31 Correct 8 ms 468 KB Output is correct
32 Correct 5 ms 340 KB Output is correct
33 Correct 4 ms 340 KB Output is correct
34 Correct 8 ms 436 KB Output is correct
35 Correct 27 ms 640 KB Output is correct
36 Correct 5 ms 340 KB Output is correct
37 Correct 4 ms 428 KB Output is correct
38 Correct 96 ms 796 KB Output is correct
39 Correct 78 ms 6860 KB Output is correct
40 Correct 345 ms 6220 KB Output is correct
41 Correct 136 ms 2868 KB Output is correct
42 Correct 276 ms 6800 KB Output is correct
43 Correct 101 ms 2884 KB Output is correct
44 Correct 45 ms 1048 KB Output is correct
45 Correct 169 ms 36588 KB Output is correct
46 Correct 156 ms 36560 KB Output is correct
47 Correct 144 ms 38320 KB Output is correct
48 Correct 141 ms 38284 KB Output is correct
49 Correct 151 ms 36628 KB Output is correct
50 Correct 170 ms 36628 KB Output is correct
51 Correct 144 ms 37064 KB Output is correct
52 Correct 149 ms 37112 KB Output is correct
53 Correct 34 ms 3212 KB Output is correct
54 Correct 226 ms 36428 KB Output is correct

Subtask #6
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 12 ms 212 KB Output is correct
6 Correct 3 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 340 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 4 ms 408 KB Output is correct
13 Correct 93 ms 432 KB Output is correct
14 Correct 116 ms 460 KB Output is correct
15 Correct 112 ms 340 KB Output is correct
16 Correct 206 ms 38056 KB Output is correct
17 Correct 745 ms 75200 KB Output is correct
18 Correct 2796 ms 219644 KB Output is correct
19 Correct 218 ms 37996 KB Output is correct
20 Correct 260 ms 38420 KB Output is correct
21 Correct 209 ms 38116 KB Output is correct
22 Correct 763 ms 83108 KB Output is correct
23 Correct 555 ms 83016 KB Output is correct
24 Correct 587 ms 83260 KB Output is correct
25 Correct 598 ms 84832 KB Output is correct
26 Correct 601 ms 84348 KB Output is correct
27 Correct 397 ms 51524 KB Output is correct
28 Correct 375 ms 58564 KB Output is correct
29 Correct 356 ms 53588 KB Output is correct
30 Correct 304 ms 46684 KB Output is correct
31 Correct 308 ms 47560 KB Output is correct
32 Correct 323 ms 45148 KB Output is correct
33 Correct 315 ms 47592 KB Output is correct

Subtask #7
0 / 23.0

# Verdict Execution time Memory 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 22 ms 212 KB Output is correct
5 Correct 47 ms 212 KB Output is correct
6 Correct 3 ms 212 KB Output is correct
7 Correct 3 ms 212 KB Output is correct
8 Correct 4 ms 212 KB Output is correct
9 Correct 81 ms 796 KB Output is correct
10 Correct 98 ms 6804 KB Output is correct
11 Correct 12 ms 308 KB Output is correct
12 Correct 68 ms 364 KB Output is correct
13 Correct 108 ms 9448 KB Output is correct
14 Correct 116 ms 9476 KB Output is correct
15 Correct 152 ms 9120 KB Output is correct
16 Correct 193 ms 12496 KB Output is correct
17 Correct 118 ms 9372 KB Output is correct
18 Correct 153 ms 12024 KB Output is correct
19 Correct 111 ms 9392 KB Output is correct
20 Correct 121 ms 10160 KB Output is correct
21 Correct 143 ms 9628 KB Output is correct
22 Correct 117 ms 9376 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 3 ms 212 KB Output is correct
26 Correct 4 ms 340 KB Output is correct
27 Correct 4 ms 340 KB Output is correct
28 Correct 4 ms 340 KB Output is correct
29 Correct 4 ms 356 KB Output is correct
30 Correct 4 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 4 ms 340 KB Output is correct
34 Correct 3 ms 340 KB Output is correct
35 Correct 2 ms 340 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 3 ms 212 KB Output is correct
39 Correct 4 ms 340 KB Output is correct
40 Correct 4 ms 340 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 4 ms 340 KB Output is correct
43 Correct 4 ms 340 KB Output is correct
44 Correct 4 ms 392 KB Output is correct
45 Correct 1 ms 212 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 5 ms 340 KB Output is correct
48 Correct 2 ms 340 KB Output is correct
49 Correct 4 ms 340 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 4 ms 212 KB Output is correct
52 Correct 6 ms 340 KB Output is correct
53 Correct 8 ms 468 KB Output is correct
54 Correct 5 ms 340 KB Output is correct
55 Correct 4 ms 340 KB Output is correct
56 Correct 8 ms 436 KB Output is correct
57 Correct 27 ms 640 KB Output is correct
58 Correct 5 ms 340 KB Output is correct
59 Correct 4 ms 428 KB Output is correct
60 Correct 96 ms 796 KB Output is correct
61 Correct 78 ms 6860 KB Output is correct
62 Correct 345 ms 6220 KB Output is correct
63 Correct 136 ms 2868 KB Output is correct
64 Correct 276 ms 6800 KB Output is correct
65 Correct 101 ms 2884 KB Output is correct
66 Correct 45 ms 1048 KB Output is correct
67 Correct 169 ms 36588 KB Output is correct
68 Correct 156 ms 36560 KB Output is correct
69 Correct 144 ms 38320 KB Output is correct
70 Correct 141 ms 38284 KB Output is correct
71 Correct 151 ms 36628 KB Output is correct
72 Correct 170 ms 36628 KB Output is correct
73 Correct 144 ms 37064 KB Output is correct
74 Correct 149 ms 37112 KB Output is correct
75 Correct 34 ms 3212 KB Output is correct
76 Correct 226 ms 36428 KB Output is correct
77 Correct 1 ms 212 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 1 ms 212 KB Output is correct
80 Correct 0 ms 212 KB Output is correct
81 Correct 12 ms 212 KB Output is correct
82 Correct 3 ms 340 KB Output is correct
83 Correct 2 ms 340 KB Output is correct
84 Correct 1 ms 212 KB Output is correct
85 Correct 1 ms 212 KB Output is correct
86 Correct 1 ms 340 KB Output is correct
87 Correct 1 ms 212 KB Output is correct
88 Correct 4 ms 408 KB Output is correct
89 Correct 93 ms 432 KB Output is correct
90 Correct 116 ms 460 KB Output is correct
91 Correct 112 ms 340 KB Output is correct
92 Correct 206 ms 38056 KB Output is correct
93 Correct 745 ms 75200 KB Output is correct
94 Correct 2796 ms 219644 KB Output is correct
95 Correct 218 ms 37996 KB Output is correct
96 Correct 260 ms 38420 KB Output is correct
97 Correct 209 ms 38116 KB Output is correct
98 Correct 763 ms 83108 KB Output is correct
99 Correct 555 ms 83016 KB Output is correct
100 Correct 587 ms 83260 KB Output is correct
101 Correct 598 ms 84832 KB Output is correct
102 Correct 601 ms 84348 KB Output is correct
103 Correct 397 ms 51524 KB Output is correct
104 Correct 375 ms 58564 KB Output is correct
105 Correct 356 ms 53588 KB Output is correct
106 Correct 304 ms 46684 KB Output is correct
107 Correct 308 ms 47560 KB Output is correct
108 Correct 323 ms 45148 KB Output is correct
109 Correct 315 ms 47592 KB Output is correct
110 Correct 128 ms 412 KB Output is correct
111 Correct 76 ms 364 KB Output is correct
112 Execution timed out 5122 ms 516044 KB Time limit exceeded
113 Halted 0 ms 0 KB -