oj.uz

답안 #669273

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
669273 2022-12-06T07:16:34 Z fatemetmhr Jail (JOI22_jail) C++17
5 / 100
 1851 ms 437688 KB 
// ~ Be Name Khoda ~

#include<bits/stdc++.h>
//#pragma GCC optimize ("Ofast")
//#pragma GCC target("avx2")
//#pragma GCC optimize("unroll-loops,O3")

using namespace std;

typedef long long ll;

#define pb       push_back
#define mp       make_pair
#define all(x)   x.begin(), x.end()
#define fi       first
#define se       second

const int maxn  =  1e6   + 10;
const int maxn5 =  2e5   + 10;
const int maxnt =  1.2e6 + 10;
const int maxn3 =  1e3   + 10;
const int mod   =  1e9   +  7;
const int lg    =  18;
const ll  inf   =  1e18;

int mark[maxn5 * lg * 2], s[maxn5], t[maxn5], h[maxn5];
int par[lg][maxn5], newnode = 0, in[lg][maxn5], out[lg][maxn5];
vector <int> adj[maxn5], ed[maxn5 * lg * 2];
bool cy = false;


void dfs_lca(int v){
    if(!out[0][v])
        out[0][v] = newnode++;
    if(!in[0][v])
        in[0][v] = newnode++;
    for(int i = 1; i < lg && par[i - 1][v] != -1; i++){
        par[i][v] = par[i - 1][par[i - 1][v]];
        out[i][v] = newnode++;
        in[i][v] = newnode++;
        ed[out[i][v]].pb(out[i - 1][v]);
        ed[out[i][v]].pb(out[i - 1][par[i - 1][v]]);
        ed[in[i - 1][v]].pb(in[i][v]);
        ed[in[i - 1][par[i - 1][v]]].pb(in[i][v]);
    }
    for(auto u : adj[v]) if(u != par[0][v]){
        par[0][u] = v;
        h[u] = h[v] + 1;
        dfs_lca(u);
    }
}

void dfs(int v){
    mark[v] = 1;
    for(auto u : ed[v]){
        if(mark[u] == 0)
            dfs(u);
        else if(mark[u] == 1)
            cy = true;
    }
    mark[v] = 2;
}

inline int lca(int a, int b){
    if(h[a] < h[b])
        swap(a, b);
    int d = h[a] - h[b];
    for(int i = 0; i < lg; i++) if((d >> i)&1)
        a = par[i][a];
    if(a == b)
        return a;
    for(int i = lg - 1; i >= 0; i--) if(par[i][a] != par[i][b]){
        a = par[i][a];
        b = par[i][b];
    }
    return par[0][a];
}
 
int main(){
    ios_base::sync_with_stdio(false); cin.tie(0);
 
    int tt; cin >> tt;
    while(tt--){
        int n; cin >> n;
        for(int i = 0; i < n; i++){
            adj[i].clear(); 
            for(int j = 0; j < lg; j++){
                par[j][i] = -1;
                in[j][i] = out[j][i] = 0;
            }
        }
        for(int i = 0; i < n - 1; i++){
            int a, b; cin >> a >> b;
            a--; b--;
            adj[a].pb(b);
            adj[b].pb(a);
        }
        int m; cin >> m;
        newnode = m;
        for(int i = 0; i < m; i++){
            cin >> s[i] >> t[i];
            s[i]--; t[i]--;
            if(!in[0][s[i]])
                in[0][s[i]] = newnode++;
            if(!out[0][t[i]])
                out[0][t[i]] = newnode++;
            ed[i].pb(in[0][s[i]]);
            ed[out[0][t[i]]].pb(i);
        }
        h[0] = 0;
        dfs_lca(0);
        for(int i = 0; i < m; i++){
            int v = s[i], u = t[i];
            if(v == u)
                continue;
            ed[i].pb(out[0][v]);
            ed[in[0][u]].pb(i);
            if(h[v] < h[u])
                swap(u, v);
            int c = lca(u, v);
            if(c == u)
                v = par[0][v];
            else{
                u = par[0][u];
                v = par[0][v];
            }
            int d = h[v] - h[u];
            for(int j = 0; j < lg; j++) if((d >> j)&1){
                ed[i].pb(out[j][v]);
                ed[in[j][v]].pb(i);
                v = par[j][v];
            }
            if(u == v)
                continue;
            for(int j = lg - 1; j >= 0; j--) if(par[j][v] != par[j][u]){
                ed[i].pb(out[j][v]);
                ed[i].pb(out[j][u]);
                ed[in[j][v]].pb(i);
                ed[in[j][u]].pb(i);
                v = par[j][v];
                u = par[j][u];
            }
            ed[i].pb(out[0][v]);
            ed[i].pb(out[0][par[0][v]]);
            ed[in[0][v]].pb(i);
            ed[in[0][par[0][v]]].pb(i);
        }
        cy = false;
        for(int i = 0; i < newnode; i++) if(!mark[i])
            dfs(i);
        cout << (cy ? "No\n" : "Yes\n");
        for(int i = 0; i < newnode; i++){
            ed[i].clear();
            mark[i] = 0;
        }
    }
}

/*
Why so fast...? 
Hold on...
Hold your breath...
Need anything else?

Nein, Kein Problem...
Das Leben war schon immer so grausam :)
*/

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 82 ms 174368 KB Output is correct
2 Correct 80 ms 174412 KB Output is correct
3 Correct 78 ms 174336 KB Output is correct
4 Correct 106 ms 174668 KB Output is correct
5 Correct 135 ms 174760 KB Output is correct
6 Correct 83 ms 174616 KB Output is correct
7 Correct 84 ms 174668 KB Output is correct
8 Correct 83 ms 174668 KB Output is correct
9 Correct 390 ms 182076 KB Output is correct
10 Correct 1078 ms 352872 KB Output is correct
11 Correct 88 ms 174500 KB Output is correct
12 Correct 151 ms 175416 KB Output is correct
13 Correct 1010 ms 360208 KB Output is correct
14 Correct 971 ms 360052 KB Output is correct
15 Correct 1388 ms 385580 KB Output is correct
16 Correct 1851 ms 437688 KB Output is correct
17 Correct 1234 ms 363920 KB Output is correct
18 Correct 1027 ms 364408 KB Output is correct
19 Correct 1172 ms 364036 KB Output is correct
20 Correct 1194 ms 363852 KB Output is correct
21 Correct 1215 ms 380072 KB Output is correct
22 Correct 842 ms 359104 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 84 ms 174312 KB Output is correct
2 Correct 88 ms 174296 KB Output is correct
3 Correct 84 ms 174600 KB Output is correct
4 Correct 85 ms 174576 KB Output is correct
5 Correct 96 ms 174560 KB Output is correct
6 Correct 88 ms 174488 KB Output is correct
7 Correct 81 ms 174596 KB Output is correct
8 Correct 82 ms 174516 KB Output is correct
9 Correct 89 ms 174540 KB Output is correct
10 Correct 83 ms 174484 KB Output is correct
11 Correct 89 ms 174540 KB Output is correct
12 Incorrect 79 ms 174436 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 84 ms 174312 KB Output is correct
2 Correct 88 ms 174296 KB Output is correct
3 Correct 84 ms 174600 KB Output is correct
4 Correct 85 ms 174576 KB Output is correct
5 Correct 96 ms 174560 KB Output is correct
6 Correct 88 ms 174488 KB Output is correct
7 Correct 81 ms 174596 KB Output is correct
8 Correct 82 ms 174516 KB Output is correct
9 Correct 89 ms 174540 KB Output is correct
10 Correct 83 ms 174484 KB Output is correct
11 Correct 89 ms 174540 KB Output is correct
12 Incorrect 79 ms 174436 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 84 ms 174312 KB Output is correct
2 Correct 88 ms 174296 KB Output is correct
3 Correct 84 ms 174600 KB Output is correct
4 Correct 85 ms 174576 KB Output is correct
5 Correct 96 ms 174560 KB Output is correct
6 Correct 88 ms 174488 KB Output is correct
7 Correct 81 ms 174596 KB Output is correct
8 Correct 82 ms 174516 KB Output is correct
9 Correct 89 ms 174540 KB Output is correct
10 Correct 83 ms 174484 KB Output is correct
11 Correct 89 ms 174540 KB Output is correct
12 Incorrect 79 ms 174436 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 84 ms 174312 KB Output is correct
2 Correct 88 ms 174296 KB Output is correct
3 Correct 84 ms 174600 KB Output is correct
4 Correct 85 ms 174576 KB Output is correct
5 Correct 96 ms 174560 KB Output is correct
6 Correct 88 ms 174488 KB Output is correct
7 Correct 81 ms 174596 KB Output is correct
8 Correct 82 ms 174516 KB Output is correct
9 Correct 89 ms 174540 KB Output is correct
10 Correct 83 ms 174484 KB Output is correct
11 Correct 89 ms 174540 KB Output is correct
12 Incorrect 79 ms 174436 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 93 ms 174400 KB Output is correct
2 Correct 79 ms 174388 KB Output is correct
3 Correct 84 ms 174332 KB Output is correct
4 Correct 94 ms 174408 KB Output is correct
5 Correct 95 ms 174340 KB Output is correct
6 Incorrect 81 ms 174400 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 82 ms 174368 KB Output is correct
2 Correct 80 ms 174412 KB Output is correct
3 Correct 78 ms 174336 KB Output is correct
4 Correct 106 ms 174668 KB Output is correct
5 Correct 135 ms 174760 KB Output is correct
6 Correct 83 ms 174616 KB Output is correct
7 Correct 84 ms 174668 KB Output is correct
8 Correct 83 ms 174668 KB Output is correct
9 Correct 390 ms 182076 KB Output is correct
10 Correct 1078 ms 352872 KB Output is correct
11 Correct 88 ms 174500 KB Output is correct
12 Correct 151 ms 175416 KB Output is correct
13 Correct 1010 ms 360208 KB Output is correct
14 Correct 971 ms 360052 KB Output is correct
15 Correct 1388 ms 385580 KB Output is correct
16 Correct 1851 ms 437688 KB Output is correct
17 Correct 1234 ms 363920 KB Output is correct
18 Correct 1027 ms 364408 KB Output is correct
19 Correct 1172 ms 364036 KB Output is correct
20 Correct 1194 ms 363852 KB Output is correct
21 Correct 1215 ms 380072 KB Output is correct
22 Correct 842 ms 359104 KB Output is correct
23 Correct 84 ms 174312 KB Output is correct
24 Correct 88 ms 174296 KB Output is correct
25 Correct 84 ms 174600 KB Output is correct
26 Correct 85 ms 174576 KB Output is correct
27 Correct 96 ms 174560 KB Output is correct
28 Correct 88 ms 174488 KB Output is correct
29 Correct 81 ms 174596 KB Output is correct
30 Correct 82 ms 174516 KB Output is correct
31 Correct 89 ms 174540 KB Output is correct
32 Correct 83 ms 174484 KB Output is correct
33 Correct 89 ms 174540 KB Output is correct
34 Incorrect 79 ms 174436 KB Output isn't correct
35 Halted 0 ms 0 KB -