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Submission #973884

# Submission time Handle Problem Language Result Execution time Memory
973884 2024-05-02T12:15:08 Z PieArmy Hard route (IZhO17_road) C++17
100 / 100
 530 ms 94208 KB 
typedef long long ll;
#include <bits/stdc++.h>
#define pb push_back
using namespace std;
int n;
ll dp[500001][3][3],ans=0,say=1;
vector<int>komsu[500001];
void ekle(int loc,int x,ll cnt){
    if(x>dp[loc][0][0]){
        swap(dp[loc][1],dp[loc][2]);
        swap(dp[loc][0],dp[loc][1]);
        dp[loc][0][0]=x;
        dp[loc][0][1]=0;
        dp[loc][0][2]=0;
    }
    else if(x>dp[loc][1][0]){
        swap(dp[loc][1],dp[loc][2]);
        dp[loc][1][0]=x;
        dp[loc][1][1]=0;
        dp[loc][1][2]=0;
        if(x==dp[loc][0][0]){
            dp[loc][1][1]=dp[loc][0][1];
            dp[loc][1][2]=dp[loc][0][2];
        }
    }
    else if(x>dp[loc][2][0]){
        dp[loc][2][0]=x;
        dp[loc][2][1]=0;
        dp[loc][2][2]=0;
        if(x==dp[loc][1][0]){
            dp[loc][2][1]=dp[loc][1][1];
            dp[loc][2][2]=dp[loc][1][2];
        }
    }
    for(int i=0;i<3;i++){
        if(x==dp[loc][i][0]){
            dp[loc][i][2]+=dp[loc][i][1]*cnt;
            dp[loc][i][1]+=cnt;
        }
    }
}
void dfs1(int pos,int root){
    dp[pos][0][1]=1;
    for(int x:komsu[pos]){
        if(x==root)continue;
        dfs1(x,pos);
        ekle(pos,dp[x][0][0]+1,dp[x][0][1]);
    }
}
void dfs2(int pos,int root){
    if(root){
        if(dp[root][0][0]-1==dp[pos][0][0]){
            ll y=dp[root][1][1];
            if(dp[root][1][0]-1==dp[pos][0][0]){
                y-=dp[pos][0][1];
            }
            ekle(pos,dp[root][1][0]+1,y);
        }
        else{
            ekle(pos,dp[root][0][0]+1,dp[root][0][1]);
        }
    }
    if(dp[pos][0][0]&&dp[pos][1][0]&&dp[pos][2][0]){
        ll art=0;
        if(dp[pos][1][0]==dp[pos][2][0]){
            art=dp[pos][1][2];
        }
        else{
            art=dp[pos][1][1]*dp[pos][2][1];
        }
        ll res=dp[pos][0][0]*(dp[pos][1][0]+dp[pos][2][0]);
        if(res>ans){
            ans=res;
            say=art;
        }
        else if(res==ans){
            say+=art;
        }
    }
    for(int x:komsu[pos]){
        if(x==root)continue;
        dfs2(x,pos);
    }
}
int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);
    cin>>n;
    for(int i=1;i<n;i++){
        int a,b;cin>>a>>b;
        komsu[a].pb(b);
        komsu[b].pb(a);
    }
    dfs1(1,0);
    dfs2(1,0);
    cout<<ans<<" "<<say;
}

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12888 KB Output is correct
2 Correct 3 ms 12892 KB Output is correct
3 Correct 3 ms 12892 KB Output is correct
4 Correct 3 ms 13140 KB Output is correct
5 Correct 3 ms 13144 KB Output is correct
6 Correct 3 ms 12892 KB Output is correct
7 Correct 3 ms 12888 KB Output is correct
8 Correct 3 ms 12892 KB Output is correct
9 Correct 3 ms 12892 KB Output is correct
10 Correct 3 ms 12888 KB Output is correct
11 Correct 3 ms 12892 KB Output is correct
12 Correct 3 ms 12892 KB Output is correct
13 Correct 3 ms 12892 KB Output is correct
14 Correct 3 ms 12892 KB Output is correct
15 Correct 3 ms 12888 KB Output is correct
16 Correct 3 ms 12888 KB Output is correct
17 Correct 3 ms 12888 KB Output is correct
18 Correct 3 ms 12888 KB Output is correct
19 Correct 3 ms 12892 KB Output is correct
20 Correct 3 ms 12892 KB Output is correct
21 Correct 3 ms 12892 KB Output is correct
22 Correct 3 ms 12892 KB Output is correct
23 Correct 3 ms 12892 KB Output is correct
24 Correct 3 ms 13144 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12888 KB Output is correct
2 Correct 3 ms 12892 KB Output is correct
3 Correct 3 ms 12892 KB Output is correct
4 Correct 3 ms 13140 KB Output is correct
5 Correct 3 ms 13144 KB Output is correct
6 Correct 3 ms 12892 KB Output is correct
7 Correct 3 ms 12888 KB Output is correct
8 Correct 3 ms 12892 KB Output is correct
9 Correct 3 ms 12892 KB Output is correct
10 Correct 3 ms 12888 KB Output is correct
11 Correct 3 ms 12892 KB Output is correct
12 Correct 3 ms 12892 KB Output is correct
13 Correct 3 ms 12892 KB Output is correct
14 Correct 3 ms 12892 KB Output is correct
15 Correct 3 ms 12888 KB Output is correct
16 Correct 3 ms 12888 KB Output is correct
17 Correct 3 ms 12888 KB Output is correct
18 Correct 3 ms 12888 KB Output is correct
19 Correct 3 ms 12892 KB Output is correct
20 Correct 3 ms 12892 KB Output is correct
21 Correct 3 ms 12892 KB Output is correct
22 Correct 3 ms 12892 KB Output is correct
23 Correct 3 ms 12892 KB Output is correct
24 Correct 3 ms 13144 KB Output is correct
25 Correct 4 ms 13148 KB Output is correct
26 Correct 4 ms 13148 KB Output is correct
27 Correct 4 ms 13148 KB Output is correct
28 Correct 4 ms 13148 KB Output is correct
29 Correct 4 ms 13144 KB Output is correct
30 Correct 4 ms 13148 KB Output is correct
31 Correct 4 ms 13148 KB Output is correct
32 Correct 4 ms 13148 KB Output is correct
33 Correct 5 ms 13148 KB Output is correct
34 Correct 4 ms 13148 KB Output is correct
35 Correct 4 ms 13148 KB Output is correct
36 Correct 4 ms 13148 KB Output is correct
37 Correct 5 ms 13148 KB Output is correct
38 Correct 5 ms 13404 KB Output is correct
39 Correct 4 ms 13148 KB Output is correct
40 Correct 5 ms 13148 KB Output is correct
41 Correct 4 ms 12892 KB Output is correct
42 Correct 5 ms 13112 KB Output is correct
43 Correct 4 ms 12892 KB Output is correct
44 Correct 4 ms 13108 KB Output is correct
45 Correct 4 ms 12892 KB Output is correct
46 Correct 4 ms 12892 KB Output is correct
47 Correct 4 ms 13072 KB Output is correct
48 Correct 4 ms 12892 KB Output is correct

Subtask #3
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12888 KB Output is correct
2 Correct 3 ms 12892 KB Output is correct
3 Correct 3 ms 12892 KB Output is correct
4 Correct 3 ms 13140 KB Output is correct
5 Correct 3 ms 13144 KB Output is correct
6 Correct 3 ms 12892 KB Output is correct
7 Correct 3 ms 12888 KB Output is correct
8 Correct 3 ms 12892 KB Output is correct
9 Correct 3 ms 12892 KB Output is correct
10 Correct 3 ms 12888 KB Output is correct
11 Correct 3 ms 12892 KB Output is correct
12 Correct 3 ms 12892 KB Output is correct
13 Correct 3 ms 12892 KB Output is correct
14 Correct 3 ms 12892 KB Output is correct
15 Correct 3 ms 12888 KB Output is correct
16 Correct 3 ms 12888 KB Output is correct
17 Correct 3 ms 12888 KB Output is correct
18 Correct 3 ms 12888 KB Output is correct
19 Correct 3 ms 12892 KB Output is correct
20 Correct 3 ms 12892 KB Output is correct
21 Correct 3 ms 12892 KB Output is correct
22 Correct 3 ms 12892 KB Output is correct
23 Correct 3 ms 12892 KB Output is correct
24 Correct 3 ms 13144 KB Output is correct
25 Correct 4 ms 13148 KB Output is correct
26 Correct 4 ms 13148 KB Output is correct
27 Correct 4 ms 13148 KB Output is correct
28 Correct 4 ms 13148 KB Output is correct
29 Correct 4 ms 13144 KB Output is correct
30 Correct 4 ms 13148 KB Output is correct
31 Correct 4 ms 13148 KB Output is correct
32 Correct 4 ms 13148 KB Output is correct
33 Correct 5 ms 13148 KB Output is correct
34 Correct 4 ms 13148 KB Output is correct
35 Correct 4 ms 13148 KB Output is correct
36 Correct 4 ms 13148 KB Output is correct
37 Correct 5 ms 13148 KB Output is correct
38 Correct 5 ms 13404 KB Output is correct
39 Correct 4 ms 13148 KB Output is correct
40 Correct 5 ms 13148 KB Output is correct
41 Correct 4 ms 12892 KB Output is correct
42 Correct 5 ms 13112 KB Output is correct
43 Correct 4 ms 12892 KB Output is correct
44 Correct 4 ms 13108 KB Output is correct
45 Correct 4 ms 12892 KB Output is correct
46 Correct 4 ms 12892 KB Output is correct
47 Correct 4 ms 13072 KB Output is correct
48 Correct 4 ms 12892 KB Output is correct
49 Correct 351 ms 74840 KB Output is correct
50 Correct 353 ms 77112 KB Output is correct
51 Correct 327 ms 78984 KB Output is correct
52 Correct 340 ms 72532 KB Output is correct
53 Correct 274 ms 75856 KB Output is correct
54 Correct 277 ms 77652 KB Output is correct
55 Correct 283 ms 72724 KB Output is correct
56 Correct 299 ms 74960 KB Output is correct
57 Correct 316 ms 80152 KB Output is correct
58 Correct 310 ms 77724 KB Output is correct
59 Correct 303 ms 77536 KB Output is correct
60 Correct 300 ms 76448 KB Output is correct
61 Correct 517 ms 94208 KB Output is correct
62 Correct 511 ms 88544 KB Output is correct
63 Correct 525 ms 72268 KB Output is correct
64 Correct 530 ms 68028 KB Output is correct
65 Correct 488 ms 65560 KB Output is correct
66 Correct 519 ms 64336 KB Output is correct
67 Correct 512 ms 63524 KB Output is correct
68 Correct 471 ms 63288 KB Output is correct
69 Correct 488 ms 63120 KB Output is correct
70 Correct 459 ms 62804 KB Output is correct
71 Correct 461 ms 62860 KB Output is correct
72 Correct 471 ms 63060 KB Output is correct
73 Correct 482 ms 63096 KB Output is correct
74 Correct 444 ms 63224 KB Output is correct
75 Correct 434 ms 63064 KB Output is correct
76 Correct 457 ms 63432 KB Output is correct
77 Correct 372 ms 63936 KB Output is correct
78 Correct 227 ms 64868 KB Output is correct