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답안 #736371

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
736371 2023-05-05T13:58:12 Z Cookie Cat Exercise (JOI23_ho_t4) C++14
100 / 100
 339 ms 54548 KB 
#include<bits/stdc++.h>
#include<fstream>
using namespace std;
ifstream fin("WINTER.inp");
ofstream fout("WINTER.out");
 
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
const ld PI = 3.14159265359;
const int x[4] = {1, -1, 0, 0};
const int y[4] = {0, 0, 1, -1};
const ll mod = 1e9 + 7;
const int mxn = 2e5, mxm = 1e5, sq = 400;
const int base = (1 << 18);
const ll inf = 1e9;
const ld pre = 1e-6;
int n;
int a[mxn + 1], dep[mxn + 1], up[mxn + 1][18], p[mxn + 1], to[mxn + 1];
ll dp[mxn + 1];
vt<int>adj[mxn + 1];
vt<pii>g[mxn + 1];
int lca(int u, int v){
    if(dep[u] < dep[v])swap(u, v);
    int k = dep[u] - dep[v];
    for(int i = 0; i < 18; i++){
        if(k & (1 << i)){
            u = up[u][i];
        }
    }
    if(u == v)return(u);
    for(int i = 17; i >= 0; i--){
        if(up[u][i] != up[v][i]){
            u = up[u][i]; v = up[v][i];
        }
    }
    return(up[u][0]);
}
void dfs2(int s){
    for(auto [i, w]: g[s]){
        dfs2(i);
        dp[s] = max(dp[s], dp[i] + w);
    }
}
void dfs(int s, int pre){
    for(auto i: adj[s]){
        if(i != pre){
            dep[i] = dep[s] + 1; up[i][0] = s;
            dfs(i, s);
        }
    }
}
int fp(int u){
    if(p[u] == u)return(u);
    return(p[u] = fp(p[u]));
}
void unon(int u, int v){
    u = fp(u); v = fp(v);
    if(u == v)return;
    if(a[u]  < a[v])swap(u, v);
    p[v] = u;
}
signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    forr(i, 1, n + 1){
        cin >> a[i]; to[a[i]] = i;
    }
    forr(i, 1, n){
        int u, v; cin >> u >> v;
        adj[u].pb(v); adj[v].pb(u);
    }
    
    dfs(1, -1);
    forr(j, 1, 18){
        forr(i, 1, n + 1){
            up[i][j] = up[up[i][j - 1]][j - 1];
        }
    }
    forr(i, 1, n + 1)p[i] = i;
    for(int i = 1; i <= n; i++){
        int id = to[i];
        for(auto j: adj[id]){
            if(a[j] < a[id]){
                int id2 = fp(j);
                //cout << id << " " << id2 << " " << dep[id] + dep[id2] - 2 * dep[lca(id, id2)] << "\n";
                unon(id, id2); g[id].pb(make_pair(id2, dep[id] + dep[id2] - 2 * dep[lca(id, id2)]));
            }
        }
    }
    dfs2(to[n]);
    cout << dp[to[n]];
    return(0);
}

Compilation message

Main.cpp: In function 'void dfs2(int)':
Main.cpp:48:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   48 |     for(auto [i, w]: g[s]){
      |              ^

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 6 ms 9740 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9732 KB Output is correct
6 Correct 5 ms 9764 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9732 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 6 ms 9740 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9732 KB Output is correct
6 Correct 5 ms 9764 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9732 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9752 KB Output is correct
12 Correct 5 ms 9740 KB Output is correct
13 Correct 5 ms 9792 KB Output is correct
14 Correct 5 ms 9736 KB Output is correct
15 Correct 5 ms 9732 KB Output is correct
16 Correct 6 ms 9812 KB Output is correct
17 Correct 6 ms 9732 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 6 ms 9740 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9732 KB Output is correct
6 Correct 5 ms 9764 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9732 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9752 KB Output is correct
12 Correct 5 ms 9740 KB Output is correct
13 Correct 5 ms 9792 KB Output is correct
14 Correct 5 ms 9736 KB Output is correct
15 Correct 5 ms 9732 KB Output is correct
16 Correct 6 ms 9812 KB Output is correct
17 Correct 6 ms 9732 KB Output is correct
18 Correct 8 ms 10836 KB Output is correct
19 Correct 8 ms 10836 KB Output is correct
20 Correct 8 ms 10896 KB Output is correct
21 Correct 8 ms 10836 KB Output is correct
22 Correct 9 ms 10836 KB Output is correct
23 Correct 9 ms 10708 KB Output is correct
24 Correct 9 ms 10816 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 6 ms 9740 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9732 KB Output is correct
6 Correct 5 ms 9764 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9732 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9752 KB Output is correct
12 Correct 5 ms 9740 KB Output is correct
13 Correct 5 ms 9792 KB Output is correct
14 Correct 5 ms 9736 KB Output is correct
15 Correct 5 ms 9732 KB Output is correct
16 Correct 6 ms 9812 KB Output is correct
17 Correct 6 ms 9732 KB Output is correct
18 Correct 8 ms 10836 KB Output is correct
19 Correct 8 ms 10836 KB Output is correct
20 Correct 8 ms 10896 KB Output is correct
21 Correct 8 ms 10836 KB Output is correct
22 Correct 9 ms 10836 KB Output is correct
23 Correct 9 ms 10708 KB Output is correct
24 Correct 9 ms 10816 KB Output is correct
25 Correct 6 ms 9684 KB Output is correct
26 Correct 8 ms 10768 KB Output is correct
27 Correct 8 ms 10736 KB Output is correct
28 Correct 11 ms 10836 KB Output is correct
29 Correct 9 ms 10740 KB Output is correct
30 Correct 8 ms 10452 KB Output is correct
31 Correct 8 ms 10452 KB Output is correct
32 Correct 9 ms 10452 KB Output is correct
33 Correct 8 ms 10452 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 6 ms 9740 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9732 KB Output is correct
6 Correct 5 ms 9764 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9732 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9752 KB Output is correct
12 Correct 5 ms 9740 KB Output is correct
13 Correct 5 ms 9792 KB Output is correct
14 Correct 5 ms 9736 KB Output is correct
15 Correct 5 ms 9732 KB Output is correct
16 Correct 6 ms 9812 KB Output is correct
17 Correct 6 ms 9732 KB Output is correct
18 Correct 8 ms 10836 KB Output is correct
19 Correct 8 ms 10836 KB Output is correct
20 Correct 8 ms 10896 KB Output is correct
21 Correct 8 ms 10836 KB Output is correct
22 Correct 9 ms 10836 KB Output is correct
23 Correct 9 ms 10708 KB Output is correct
24 Correct 9 ms 10816 KB Output is correct
25 Correct 152 ms 53836 KB Output is correct
26 Correct 134 ms 54076 KB Output is correct
27 Correct 135 ms 54548 KB Output is correct
28 Correct 194 ms 51412 KB Output is correct
29 Correct 201 ms 51476 KB Output is correct
30 Correct 202 ms 52280 KB Output is correct
31 Correct 196 ms 51788 KB Output is correct

Subtask #6
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 9652 KB Output is correct
2 Correct 6 ms 9704 KB Output is correct
3 Correct 224 ms 42312 KB Output is correct
4 Correct 206 ms 40260 KB Output is correct
5 Correct 216 ms 40880 KB Output is correct

Subtask #7
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 6 ms 9684 KB Output is correct
3 Correct 6 ms 9740 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9732 KB Output is correct
6 Correct 5 ms 9764 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 6 ms 9732 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 6 ms 9752 KB Output is correct
12 Correct 5 ms 9740 KB Output is correct
13 Correct 5 ms 9792 KB Output is correct
14 Correct 5 ms 9736 KB Output is correct
15 Correct 5 ms 9732 KB Output is correct
16 Correct 6 ms 9812 KB Output is correct
17 Correct 6 ms 9732 KB Output is correct
18 Correct 8 ms 10836 KB Output is correct
19 Correct 8 ms 10836 KB Output is correct
20 Correct 8 ms 10896 KB Output is correct
21 Correct 8 ms 10836 KB Output is correct
22 Correct 9 ms 10836 KB Output is correct
23 Correct 9 ms 10708 KB Output is correct
24 Correct 9 ms 10816 KB Output is correct
25 Correct 6 ms 9684 KB Output is correct
26 Correct 8 ms 10768 KB Output is correct
27 Correct 8 ms 10736 KB Output is correct
28 Correct 11 ms 10836 KB Output is correct
29 Correct 9 ms 10740 KB Output is correct
30 Correct 8 ms 10452 KB Output is correct
31 Correct 8 ms 10452 KB Output is correct
32 Correct 9 ms 10452 KB Output is correct
33 Correct 8 ms 10452 KB Output is correct
34 Correct 152 ms 53836 KB Output is correct
35 Correct 134 ms 54076 KB Output is correct
36 Correct 135 ms 54548 KB Output is correct
37 Correct 194 ms 51412 KB Output is correct
38 Correct 201 ms 51476 KB Output is correct
39 Correct 202 ms 52280 KB Output is correct
40 Correct 196 ms 51788 KB Output is correct
41 Correct 8 ms 9652 KB Output is correct
42 Correct 6 ms 9704 KB Output is correct
43 Correct 224 ms 42312 KB Output is correct
44 Correct 206 ms 40260 KB Output is correct
45 Correct 216 ms 40880 KB Output is correct
46 Correct 294 ms 49380 KB Output is correct
47 Correct 290 ms 49008 KB Output is correct
48 Correct 299 ms 49724 KB Output is correct
49 Correct 298 ms 49532 KB Output is correct
50 Correct 330 ms 40048 KB Output is correct
51 Correct 333 ms 39372 KB Output is correct
52 Correct 321 ms 39284 KB Output is correct
53 Correct 339 ms 39276 KB Output is correct