oj.uz

Submission #725006

# Submission time Handle Problem Language Result Execution time Memory
725006 2023-04-16T12:48:09 Z berr Jail (JOI22_jail) C++17
61 / 100
 5000 ms 31052 KB 
#include <bits/stdc++.h>
using namespace std; 
const int N = 1e5 + 2e4 + 37;
vector<int> adj[N], adj2[N], adj3[N], s(N), e(N), ti(N), to(N), vis(N), de(N), qe(N, -1), qs(N, -1);
int par[N][18], cnt, flag;


bool ia(int x, int y){
    return ti[x] <= ti[y] && to[x] >= to[y];
}

int d(int x, int y){
    if(x == y || x==-1 || y==-1) return 0;

    int sum = 0;

    if(ia(x, y)) swap(x, y);

    for (int i = 17; i >= 0; i--){
        if(!ia(par[x][i], y)){
            x = par[x][i];
            sum += 1<<i;
        }
    }

    sum++;
    x=par[x][0];



    swap(x, y);

    sum+=de[x]-de[y];
    return sum;
}

bool c(int x, int y){
    if(x==y || x==-1 || y==-1) return 0;

    if( (d(s[x], e[x]) == (d(s[x], e[y])+ d(e[y], e[x])))) return 1;
    swap(x, y);
    return (d(s[x], e[x]) == (d(s[x], s[y])+ d(s[y], e[x])));
}
bool c2(int x, int y){
    if(x==y) return 0;

    if(d(s[x], e[x]) == d(s[x], s[y])+ d(s[y], e[y]) + d(e[y], e[x])) return 1;
    if(d(s[x], e[x]) == d(s[x], e[y])+ d(e[y], s[y]) + d(s[y], e[x])) return 1;
    return 0;
}

void dfs(int v, int p){
    par[v][0] = p;
    de[v]=de[p]+1;
    ti[v] = cnt++;
    
    for (auto i: adj[v]){
        if (i == p) continue;
        dfs(i, v);
    }

    to[v] = cnt++;
}

void dfs2(int v, int z){
    vis[v] = z;

    for (auto i: adj2[v]){
        if (vis[i]==z) flag = 0;
        else if(vis[i]<z) dfs2(i, z);
    }

    vis[v]=z+1;
}

void ssolve(int n, int m){
    for(int i=0;i<m; i++){
        vector<int> path;

        int x=s[i], y=e[i];


        while(!ia(x, y)){
            path.push_back(x);
            x=par[x][0];
        }

        path.push_back(x);

        while(!ia(y, x)){
            path.push_back(y);
            y=par[y][0];
        }

        for(auto i: path){
            int l=qs[i];

            if (c(i, l)) adj2[i].push_back(l);


            if(c2(i, l)) flag = 0;

            l=qe[i];

            if (c(i, l)) adj2[i].push_back(l);


            if(c2(i, l)) flag = 0;  

        }
    }


    for(int i = 0; i < n; i++){
        if(vis[i]==0) dfs2(i, n*i+1);
    }


    if(flag) cout<<"Yes\n";
    else cout<<"No\n";

    for (int i = 0; i < n; i++){
        adj[i].clear();
        adj2[i].clear();
        vis[i] = 0;
        qs[i]=qe[i]=-1;
    }
}

void solve(){
    int n; cin >> n;
    cnt = 0;

    for (int i = 1; i < n; i++){
        int x, y; cin >> x >> y;
        x--; y--;
        adj[x].push_back(y);
        adj[y].push_back(x);
    }

    de[0]=-1;
    dfs(0, 0);

    for (int i = 1; i < 18; i++){
        for(int l = 0; l < n; l++){
            par[l][i] = par[par[l][i-1]][i-1];
        }
    }

    flag = 1;

    int m; cin >> m;


    for (int i = 0; i < m; i++){
        cin >> s[i] >> e[i];
        s[i]--; e[i]--;
        qs[s[i]]=i;
        qe[e[i]]=i;

    }
    if(m>500){
        ssolve(n, m);
        return ;
    }
    else{

    for (int i = 0; i < m; i++){
        for (int l = 0; l < m; l++){
            if (c(i, l)) adj2[i].push_back(l);


            if(c2(i, l)) flag = 0;
            

        }
    }

    for(int i = 0; i < n; i++){
        if(vis[i]==0) dfs2(i, n*i+1);
    }


    if(flag) cout << "Yes\n";
    else cout << "No\n";

    for (int i = 0; i < n; i++){
        adj[i].clear();
        adj2[i].clear();
        vis[i] = 0;
        qs[i]=qe[i]=-1;
    }
    }
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
        
    int t; cin>>t;

    while(t--){
        solve();
    }
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12500 KB Output is correct
2 Correct 6 ms 12500 KB Output is correct
3 Correct 6 ms 12500 KB Output is correct
4 Correct 17 ms 12500 KB Output is correct
5 Correct 27 ms 12500 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 8 ms 12552 KB Output is correct
8 Correct 153 ms 12720 KB Output is correct
9 Correct 4890 ms 14544 KB Output is correct
10 Correct 249 ms 31052 KB Output is correct
11 Correct 46 ms 12580 KB Output is correct
12 Correct 1535 ms 12592 KB Output is correct
13 Execution timed out 5079 ms 30328 KB Time limit exceeded
14 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12500 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 7 ms 12500 KB Output is correct
4 Correct 8 ms 12500 KB Output is correct
5 Correct 7 ms 12500 KB Output is correct
6 Correct 8 ms 12604 KB Output is correct
7 Correct 7 ms 12500 KB Output is correct
8 Correct 8 ms 12500 KB Output is correct
9 Correct 9 ms 12500 KB Output is correct
10 Correct 7 ms 12500 KB Output is correct
11 Correct 8 ms 12496 KB Output is correct
12 Correct 7 ms 12584 KB Output is correct
13 Correct 6 ms 12500 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12500 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 7 ms 12500 KB Output is correct
4 Correct 8 ms 12500 KB Output is correct
5 Correct 7 ms 12500 KB Output is correct
6 Correct 8 ms 12604 KB Output is correct
7 Correct 7 ms 12500 KB Output is correct
8 Correct 8 ms 12500 KB Output is correct
9 Correct 9 ms 12500 KB Output is correct
10 Correct 7 ms 12500 KB Output is correct
11 Correct 8 ms 12496 KB Output is correct
12 Correct 7 ms 12584 KB Output is correct
13 Correct 6 ms 12500 KB Output is correct
14 Correct 6 ms 12500 KB Output is correct
15 Correct 6 ms 12500 KB Output is correct
16 Correct 7 ms 12500 KB Output is correct
17 Correct 7 ms 12508 KB Output is correct
18 Correct 7 ms 12500 KB Output is correct
19 Correct 6 ms 12500 KB Output is correct
20 Correct 8 ms 12500 KB Output is correct
21 Correct 8 ms 12500 KB Output is correct
22 Correct 9 ms 12612 KB Output is correct
23 Correct 8 ms 12500 KB Output is correct
24 Correct 6 ms 12500 KB Output is correct
25 Correct 11 ms 12500 KB Output is correct
26 Correct 10 ms 12500 KB Output is correct
27 Correct 8 ms 12492 KB Output is correct
28 Correct 6 ms 12500 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12500 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 7 ms 12500 KB Output is correct
4 Correct 8 ms 12500 KB Output is correct
5 Correct 7 ms 12500 KB Output is correct
6 Correct 8 ms 12604 KB Output is correct
7 Correct 7 ms 12500 KB Output is correct
8 Correct 8 ms 12500 KB Output is correct
9 Correct 9 ms 12500 KB Output is correct
10 Correct 7 ms 12500 KB Output is correct
11 Correct 8 ms 12496 KB Output is correct
12 Correct 7 ms 12584 KB Output is correct
13 Correct 6 ms 12500 KB Output is correct
14 Correct 6 ms 12500 KB Output is correct
15 Correct 6 ms 12500 KB Output is correct
16 Correct 7 ms 12500 KB Output is correct
17 Correct 7 ms 12508 KB Output is correct
18 Correct 7 ms 12500 KB Output is correct
19 Correct 6 ms 12500 KB Output is correct
20 Correct 8 ms 12500 KB Output is correct
21 Correct 8 ms 12500 KB Output is correct
22 Correct 9 ms 12612 KB Output is correct
23 Correct 8 ms 12500 KB Output is correct
24 Correct 6 ms 12500 KB Output is correct
25 Correct 11 ms 12500 KB Output is correct
26 Correct 10 ms 12500 KB Output is correct
27 Correct 8 ms 12492 KB Output is correct
28 Correct 6 ms 12500 KB Output is correct
29 Correct 138 ms 12592 KB Output is correct
30 Correct 57 ms 12500 KB Output is correct
31 Correct 62 ms 12608 KB Output is correct
32 Correct 35 ms 12500 KB Output is correct
33 Correct 11 ms 12504 KB Output is correct
34 Correct 92 ms 12612 KB Output is correct
35 Correct 109 ms 12632 KB Output is correct
36 Correct 83 ms 12600 KB Output is correct
37 Correct 60 ms 12712 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12500 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 7 ms 12500 KB Output is correct
4 Correct 8 ms 12500 KB Output is correct
5 Correct 7 ms 12500 KB Output is correct
6 Correct 8 ms 12604 KB Output is correct
7 Correct 7 ms 12500 KB Output is correct
8 Correct 8 ms 12500 KB Output is correct
9 Correct 9 ms 12500 KB Output is correct
10 Correct 7 ms 12500 KB Output is correct
11 Correct 8 ms 12496 KB Output is correct
12 Correct 7 ms 12584 KB Output is correct
13 Correct 6 ms 12500 KB Output is correct
14 Correct 6 ms 12500 KB Output is correct
15 Correct 6 ms 12500 KB Output is correct
16 Correct 7 ms 12500 KB Output is correct
17 Correct 7 ms 12508 KB Output is correct
18 Correct 7 ms 12500 KB Output is correct
19 Correct 6 ms 12500 KB Output is correct
20 Correct 8 ms 12500 KB Output is correct
21 Correct 8 ms 12500 KB Output is correct
22 Correct 9 ms 12612 KB Output is correct
23 Correct 8 ms 12500 KB Output is correct
24 Correct 6 ms 12500 KB Output is correct
25 Correct 11 ms 12500 KB Output is correct
26 Correct 10 ms 12500 KB Output is correct
27 Correct 8 ms 12492 KB Output is correct
28 Correct 6 ms 12500 KB Output is correct
29 Correct 138 ms 12592 KB Output is correct
30 Correct 57 ms 12500 KB Output is correct
31 Correct 62 ms 12608 KB Output is correct
32 Correct 35 ms 12500 KB Output is correct
33 Correct 11 ms 12504 KB Output is correct
34 Correct 92 ms 12612 KB Output is correct
35 Correct 109 ms 12632 KB Output is correct
36 Correct 83 ms 12600 KB Output is correct
37 Correct 60 ms 12712 KB Output is correct
38 Correct 4911 ms 14548 KB Output is correct
39 Correct 249 ms 31052 KB Output is correct
40 Correct 3849 ms 14352 KB Output is correct
41 Correct 2842 ms 13244 KB Output is correct
42 Correct 2757 ms 14692 KB Output is correct
43 Correct 67 ms 13296 KB Output is correct
44 Correct 2183 ms 12940 KB Output is correct
45 Correct 275 ms 24816 KB Output is correct
46 Correct 281 ms 24816 KB Output is correct
47 Correct 437 ms 27596 KB Output is correct
48 Correct 466 ms 27584 KB Output is correct
49 Correct 370 ms 24920 KB Output is correct
50 Correct 384 ms 24924 KB Output is correct
51 Correct 104 ms 25640 KB Output is correct
52 Correct 105 ms 25736 KB Output is correct
53 Correct 1891 ms 13388 KB Output is correct
54 Correct 241 ms 24780 KB Output is correct

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12500 KB Output is correct
2 Correct 6 ms 12500 KB Output is correct
3 Correct 7 ms 12480 KB Output is correct
4 Correct 6 ms 12500 KB Output is correct
5 Correct 50 ms 12500 KB Output is correct
6 Correct 7 ms 12508 KB Output is correct
7 Correct 7 ms 12500 KB Output is correct
8 Correct 7 ms 12500 KB Output is correct
9 Correct 8 ms 12512 KB Output is correct
10 Correct 7 ms 12500 KB Output is correct
11 Correct 7 ms 12500 KB Output is correct
12 Correct 88 ms 12716 KB Output is correct
13 Correct 1008 ms 12872 KB Output is correct
14 Correct 444 ms 12576 KB Output is correct
15 Correct 722 ms 12580 KB Output is correct
16 Correct 167 ms 25280 KB Output is correct
17 Correct 1142 ms 25544 KB Output is correct
18 Incorrect 3221 ms 26248 KB Output isn't correct
19 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12500 KB Output is correct
2 Correct 6 ms 12500 KB Output is correct
3 Correct 6 ms 12500 KB Output is correct
4 Correct 17 ms 12500 KB Output is correct
5 Correct 27 ms 12500 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 8 ms 12552 KB Output is correct
8 Correct 153 ms 12720 KB Output is correct
9 Correct 4890 ms 14544 KB Output is correct
10 Correct 249 ms 31052 KB Output is correct
11 Correct 46 ms 12580 KB Output is correct
12 Correct 1535 ms 12592 KB Output is correct
13 Execution timed out 5079 ms 30328 KB Time limit exceeded
14 Halted 0 ms 0 KB -