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Submission #973888

# Submission time Handle Problem Language Result Execution time Memory
973888 2024-05-02T12:19:58 Z PieArmy Hard route (IZhO17_road) C++17
100 / 100
 511 ms 86356 KB 
#pragma GCC optimize("O3,fast-math,unroll-all-loops")
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(komsu[pos].size()>2){
        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 5 ms 12888 KB Output is correct
2 Correct 4 ms 12888 KB Output is correct
3 Correct 4 ms 12892 KB Output is correct
4 Correct 5 ms 13144 KB Output is correct
5 Correct 4 ms 12892 KB Output is correct
6 Correct 5 ms 12888 KB Output is correct
7 Correct 4 ms 12892 KB Output is correct
8 Correct 4 ms 12892 KB Output is correct
9 Correct 4 ms 12892 KB Output is correct
10 Correct 4 ms 12892 KB Output is correct
11 Correct 4 ms 12892 KB Output is correct
12 Correct 4 ms 12892 KB Output is correct
13 Correct 4 ms 12892 KB Output is correct
14 Correct 4 ms 12892 KB Output is correct
15 Correct 4 ms 12892 KB Output is correct
16 Correct 4 ms 12892 KB Output is correct
17 Correct 4 ms 12892 KB Output is correct
18 Correct 4 ms 12892 KB Output is correct
19 Correct 4 ms 12912 KB Output is correct
20 Correct 4 ms 12892 KB Output is correct
21 Correct 4 ms 12888 KB Output is correct
22 Correct 4 ms 12892 KB Output is correct
23 Correct 4 ms 12952 KB Output is correct
24 Correct 4 ms 12892 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 12888 KB Output is correct
2 Correct 4 ms 12888 KB Output is correct
3 Correct 4 ms 12892 KB Output is correct
4 Correct 5 ms 13144 KB Output is correct
5 Correct 4 ms 12892 KB Output is correct
6 Correct 5 ms 12888 KB Output is correct
7 Correct 4 ms 12892 KB Output is correct
8 Correct 4 ms 12892 KB Output is correct
9 Correct 4 ms 12892 KB Output is correct
10 Correct 4 ms 12892 KB Output is correct
11 Correct 4 ms 12892 KB Output is correct
12 Correct 4 ms 12892 KB Output is correct
13 Correct 4 ms 12892 KB Output is correct
14 Correct 4 ms 12892 KB Output is correct
15 Correct 4 ms 12892 KB Output is correct
16 Correct 4 ms 12892 KB Output is correct
17 Correct 4 ms 12892 KB Output is correct
18 Correct 4 ms 12892 KB Output is correct
19 Correct 4 ms 12912 KB Output is correct
20 Correct 4 ms 12892 KB Output is correct
21 Correct 4 ms 12888 KB Output is correct
22 Correct 4 ms 12892 KB Output is correct
23 Correct 4 ms 12952 KB Output is correct
24 Correct 4 ms 12892 KB Output is correct
25 Correct 5 ms 13176 KB Output is correct
26 Correct 5 ms 13148 KB Output is correct
27 Correct 5 ms 13148 KB Output is correct
28 Correct 5 ms 13148 KB Output is correct
29 Correct 5 ms 13148 KB Output is correct
30 Correct 6 ms 13400 KB Output is correct
31 Correct 5 ms 13148 KB Output is correct
32 Correct 5 ms 13148 KB Output is correct
33 Correct 5 ms 13148 KB Output is correct
34 Correct 5 ms 13148 KB Output is correct
35 Correct 6 ms 13148 KB Output is correct
36 Correct 5 ms 13148 KB Output is correct
37 Correct 5 ms 13148 KB Output is correct
38 Correct 5 ms 13144 KB Output is correct
39 Correct 5 ms 13148 KB Output is correct
40 Correct 5 ms 12888 KB Output is correct
41 Correct 6 ms 12892 KB Output is correct
42 Correct 6 ms 12892 KB Output is correct
43 Correct 5 ms 12888 KB Output is correct
44 Correct 5 ms 12892 KB Output is correct
45 Correct 5 ms 12888 KB Output is correct
46 Correct 5 ms 12892 KB Output is correct
47 Correct 5 ms 12892 KB Output is correct
48 Correct 5 ms 12900 KB Output is correct

Subtask #3
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 12888 KB Output is correct
2 Correct 4 ms 12888 KB Output is correct
3 Correct 4 ms 12892 KB Output is correct
4 Correct 5 ms 13144 KB Output is correct
5 Correct 4 ms 12892 KB Output is correct
6 Correct 5 ms 12888 KB Output is correct
7 Correct 4 ms 12892 KB Output is correct
8 Correct 4 ms 12892 KB Output is correct
9 Correct 4 ms 12892 KB Output is correct
10 Correct 4 ms 12892 KB Output is correct
11 Correct 4 ms 12892 KB Output is correct
12 Correct 4 ms 12892 KB Output is correct
13 Correct 4 ms 12892 KB Output is correct
14 Correct 4 ms 12892 KB Output is correct
15 Correct 4 ms 12892 KB Output is correct
16 Correct 4 ms 12892 KB Output is correct
17 Correct 4 ms 12892 KB Output is correct
18 Correct 4 ms 12892 KB Output is correct
19 Correct 4 ms 12912 KB Output is correct
20 Correct 4 ms 12892 KB Output is correct
21 Correct 4 ms 12888 KB Output is correct
22 Correct 4 ms 12892 KB Output is correct
23 Correct 4 ms 12952 KB Output is correct
24 Correct 4 ms 12892 KB Output is correct
25 Correct 5 ms 13176 KB Output is correct
26 Correct 5 ms 13148 KB Output is correct
27 Correct 5 ms 13148 KB Output is correct
28 Correct 5 ms 13148 KB Output is correct
29 Correct 5 ms 13148 KB Output is correct
30 Correct 6 ms 13400 KB Output is correct
31 Correct 5 ms 13148 KB Output is correct
32 Correct 5 ms 13148 KB Output is correct
33 Correct 5 ms 13148 KB Output is correct
34 Correct 5 ms 13148 KB Output is correct
35 Correct 6 ms 13148 KB Output is correct
36 Correct 5 ms 13148 KB Output is correct
37 Correct 5 ms 13148 KB Output is correct
38 Correct 5 ms 13144 KB Output is correct
39 Correct 5 ms 13148 KB Output is correct
40 Correct 5 ms 12888 KB Output is correct
41 Correct 6 ms 12892 KB Output is correct
42 Correct 6 ms 12892 KB Output is correct
43 Correct 5 ms 12888 KB Output is correct
44 Correct 5 ms 12892 KB Output is correct
45 Correct 5 ms 12888 KB Output is correct
46 Correct 5 ms 12892 KB Output is correct
47 Correct 5 ms 12892 KB Output is correct
48 Correct 5 ms 12900 KB Output is correct
49 Correct 325 ms 72012 KB Output is correct
50 Correct 379 ms 73412 KB Output is correct
51 Correct 314 ms 74836 KB Output is correct
52 Correct 353 ms 70128 KB Output is correct
53 Correct 261 ms 72528 KB Output is correct
54 Correct 316 ms 74276 KB Output is correct
55 Correct 289 ms 70156 KB Output is correct
56 Correct 256 ms 71760 KB Output is correct
57 Correct 313 ms 75860 KB Output is correct
58 Correct 301 ms 73808 KB Output is correct
59 Correct 298 ms 73884 KB Output is correct
60 Correct 283 ms 73040 KB Output is correct
61 Correct 498 ms 86356 KB Output is correct
62 Correct 511 ms 82084 KB Output is correct
63 Correct 494 ms 69744 KB Output is correct
64 Correct 490 ms 66896 KB Output is correct
65 Correct 481 ms 64852 KB Output is correct
66 Correct 467 ms 64080 KB Output is correct
67 Correct 460 ms 63568 KB Output is correct
68 Correct 440 ms 63060 KB Output is correct
69 Correct 476 ms 63340 KB Output is correct
70 Correct 479 ms 62920 KB Output is correct
71 Correct 497 ms 62844 KB Output is correct
72 Correct 481 ms 63228 KB Output is correct
73 Correct 468 ms 63096 KB Output is correct
74 Correct 462 ms 63220 KB Output is correct
75 Correct 458 ms 63180 KB Output is correct
76 Correct 428 ms 63624 KB Output is correct
77 Correct 331 ms 63936 KB Output is correct
78 Correct 211 ms 64956 KB Output is correct