oj.uz

Submission #725014

# Submission time Handle Problem Language Result Execution time Memory
725014 2023-04-16T12:57:01 Z berr Jail (JOI22_jail) C++17
49 / 100
 5000 ms 31044 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++){

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


        while(!ia(x, y)){

            int l=qs[x];
            if (c(i, l)) adj2[i].push_back(l);


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

            x=par[x][0];
        }

        int l=qs[x];
                    if (c(i, l)) adj2[i].push_back(l);


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


         while(!ia(y, x)){
            int l=qs[y];
            if (c(i, l)) adj2[i].push_back(l);


            if(c2(i, l)) flag = 0;
            y=par[y][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 7 ms 12500 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 10 ms 12500 KB Output is correct
4 Correct 18 ms 12492 KB Output is correct
5 Correct 28 ms 12588 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 8 ms 12500 KB Output is correct
8 Correct 139 ms 12608 KB Output is correct
9 Correct 4962 ms 14656 KB Output is correct
10 Correct 279 ms 31044 KB Output is correct
11 Correct 47 ms 12552 KB Output is correct
12 Correct 1552 ms 12772 KB Output is correct
13 Incorrect 2931 ms 30404 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 12528 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 7 ms 12500 KB Output is correct
4 Correct 7 ms 12500 KB Output is correct
5 Correct 8 ms 12500 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 10 ms 12500 KB Output is correct
8 Correct 7 ms 12500 KB Output is correct
9 Correct 7 ms 12500 KB Output is correct
10 Correct 7 ms 12564 KB Output is correct
11 Correct 7 ms 12500 KB Output is correct
12 Correct 7 ms 12500 KB Output is correct
13 Correct 7 ms 12500 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 12528 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 7 ms 12500 KB Output is correct
4 Correct 7 ms 12500 KB Output is correct
5 Correct 8 ms 12500 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 10 ms 12500 KB Output is correct
8 Correct 7 ms 12500 KB Output is correct
9 Correct 7 ms 12500 KB Output is correct
10 Correct 7 ms 12564 KB Output is correct
11 Correct 7 ms 12500 KB Output is correct
12 Correct 7 ms 12500 KB Output is correct
13 Correct 7 ms 12500 KB Output is correct
14 Correct 7 ms 12520 KB Output is correct
15 Correct 7 ms 12500 KB Output is correct
16 Correct 8 ms 12500 KB Output is correct
17 Correct 9 ms 12600 KB Output is correct
18 Correct 9 ms 12604 KB Output is correct
19 Correct 7 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 8 ms 12500 KB Output is correct
23 Correct 7 ms 12500 KB Output is correct
24 Correct 7 ms 12500 KB Output is correct
25 Correct 7 ms 12500 KB Output is correct
26 Correct 7 ms 12500 KB Output is correct
27 Correct 8 ms 12500 KB Output is correct
28 Correct 7 ms 12500 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 12528 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 7 ms 12500 KB Output is correct
4 Correct 7 ms 12500 KB Output is correct
5 Correct 8 ms 12500 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 10 ms 12500 KB Output is correct
8 Correct 7 ms 12500 KB Output is correct
9 Correct 7 ms 12500 KB Output is correct
10 Correct 7 ms 12564 KB Output is correct
11 Correct 7 ms 12500 KB Output is correct
12 Correct 7 ms 12500 KB Output is correct
13 Correct 7 ms 12500 KB Output is correct
14 Correct 7 ms 12520 KB Output is correct
15 Correct 7 ms 12500 KB Output is correct
16 Correct 8 ms 12500 KB Output is correct
17 Correct 9 ms 12600 KB Output is correct
18 Correct 9 ms 12604 KB Output is correct
19 Correct 7 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 8 ms 12500 KB Output is correct
23 Correct 7 ms 12500 KB Output is correct
24 Correct 7 ms 12500 KB Output is correct
25 Correct 7 ms 12500 KB Output is correct
26 Correct 7 ms 12500 KB Output is correct
27 Correct 8 ms 12500 KB Output is correct
28 Correct 7 ms 12500 KB Output is correct
29 Correct 157 ms 12732 KB Output is correct
30 Correct 59 ms 12708 KB Output is correct
31 Correct 61 ms 12500 KB Output is correct
32 Correct 32 ms 12500 KB Output is correct
33 Correct 11 ms 12604 KB Output is correct
34 Correct 99 ms 12600 KB Output is correct
35 Correct 110 ms 12744 KB Output is correct
36 Correct 88 ms 12592 KB Output is correct
37 Correct 64 ms 12620 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 12528 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 7 ms 12500 KB Output is correct
4 Correct 7 ms 12500 KB Output is correct
5 Correct 8 ms 12500 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 10 ms 12500 KB Output is correct
8 Correct 7 ms 12500 KB Output is correct
9 Correct 7 ms 12500 KB Output is correct
10 Correct 7 ms 12564 KB Output is correct
11 Correct 7 ms 12500 KB Output is correct
12 Correct 7 ms 12500 KB Output is correct
13 Correct 7 ms 12500 KB Output is correct
14 Correct 7 ms 12520 KB Output is correct
15 Correct 7 ms 12500 KB Output is correct
16 Correct 8 ms 12500 KB Output is correct
17 Correct 9 ms 12600 KB Output is correct
18 Correct 9 ms 12604 KB Output is correct
19 Correct 7 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 8 ms 12500 KB Output is correct
23 Correct 7 ms 12500 KB Output is correct
24 Correct 7 ms 12500 KB Output is correct
25 Correct 7 ms 12500 KB Output is correct
26 Correct 7 ms 12500 KB Output is correct
27 Correct 8 ms 12500 KB Output is correct
28 Correct 7 ms 12500 KB Output is correct
29 Correct 157 ms 12732 KB Output is correct
30 Correct 59 ms 12708 KB Output is correct
31 Correct 61 ms 12500 KB Output is correct
32 Correct 32 ms 12500 KB Output is correct
33 Correct 11 ms 12604 KB Output is correct
34 Correct 99 ms 12600 KB Output is correct
35 Correct 110 ms 12744 KB Output is correct
36 Correct 88 ms 12592 KB Output is correct
37 Correct 64 ms 12620 KB Output is correct
38 Execution timed out 5009 ms 14648 KB Time limit exceeded
39 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12500 KB Output is correct
2 Correct 7 ms 12484 KB Output is correct
3 Correct 6 ms 12500 KB Output is correct
4 Correct 6 ms 12500 KB Output is correct
5 Correct 45 ms 12628 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 9 ms 12544 KB Output is correct
8 Correct 7 ms 12500 KB Output is correct
9 Correct 8 ms 12500 KB Output is correct
10 Correct 7 ms 12584 KB Output is correct
11 Correct 10 ms 12500 KB Output is correct
12 Correct 92 ms 12596 KB Output is correct
13 Correct 967 ms 12648 KB Output is correct
14 Correct 464 ms 12704 KB Output is correct
15 Correct 755 ms 12592 KB Output is correct
16 Correct 120 ms 24968 KB Output is correct
17 Correct 572 ms 24992 KB Output is correct
18 Correct 1391 ms 24968 KB Output is correct
19 Incorrect 152 ms 26700 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 12500 KB Output is correct
2 Correct 7 ms 12500 KB Output is correct
3 Correct 10 ms 12500 KB Output is correct
4 Correct 18 ms 12492 KB Output is correct
5 Correct 28 ms 12588 KB Output is correct
6 Correct 7 ms 12500 KB Output is correct
7 Correct 8 ms 12500 KB Output is correct
8 Correct 139 ms 12608 KB Output is correct
9 Correct 4962 ms 14656 KB Output is correct
10 Correct 279 ms 31044 KB Output is correct
11 Correct 47 ms 12552 KB Output is correct
12 Correct 1552 ms 12772 KB Output is correct
13 Incorrect 2931 ms 30404 KB Output isn't correct
14 Halted 0 ms 0 KB -