oj.uz

Submission #740553

# Submission time Handle Problem Language Result Execution time Memory
740553 2023-05-12T17:10:11 Z victor_gao Hard route (IZhO17_road) C++17
52 / 100
 916 ms 173520 KB 
#pragma GCC optimize("Ofast,unroll-loops,O3")
#pragma GCC optimize("avx,avx2,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,fma,tune=native")
#include<bits/stdc++.h>
//#include<bits/extc++.h>
//#pragma pack(1)
#define fast ios::sync_with_stdio(0); cin.tie(0);
#define pii pair<int,int>
#define x first
#define y second
#define N 500015
using namespace std;
//using namespace __gnu_pbds;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//typedef tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update> order_multiset;
//typedef tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update> order_set;
int n,fa[N];
long long ans=-1,cnt=0,a=0,b=0;
pii dp[N],dp1[N];
vector<int>g[N];
void dfs(int p,int lp){
    fa[p]=lp; dp[p]={0,0};
    if (g[p].size()==1){
        dp[p].y=1;
        return;
    }
    for (auto i:g[p]){
        if (i!=lp){
            dfs(i,p);
            if (dp[p].x==dp[i].x+1)
                dp[p].y+=dp[i].y;
            else dp[p]=max(dp[p],pii(dp[i].x+1,dp[i].y));
        }
    }
}
void dfs1(int p,int lp,pii val){
    dp1[p]={val.x+1,val.y};
    pii mx1=val,mx2={-1,0};
    for (auto i:g[p]){
        if (i!=lp){
            if (mx1.x==dp[i].x) mx1.y+=dp[i].y;
            else if (mx2.x==dp[i].x) mx2.y+=dp[i].y;
            else mx2=max(mx2,dp[i]);
            if (mx1<mx2) swap(mx1,mx2);
        }
    }
    mx1.x++; mx2.x++;
    for (auto i:g[p]){
        if (i!=lp){
            if (dp[i].x==mx1.x-1&&dp[i].y==mx1.y)
                dfs1(i,p,mx2);
            else if (dp[i].x==mx1.x-1)
                dfs1(i,p,{mx1.x,mx1.y-dp[i].y});
            else dfs1(i,p,mx1);
        }
    }
}
void relax(int x,int y){
    swap(x,y);
    if (x*y>ans){
        ans=x*y;
        a=x; b=y;
    }
}
void solve(){
    for (int j=1;j<=n;j++){
        vector<int>dep;
        for (auto i:g[j]){
            if (i!=fa[j])
                dep.push_back(dp[i].x+1);
        }
        if (dp1[j].y) dep.push_back(dp1[j].x);
        sort(dep.begin(),dep.end());
        if (dep.size()>2){
            int b1=dep.back(),b2=dep[dep.size()-2],b3=dep[dep.size()-3];
            for (int i=0;i<(int)(dep.size())-2;i++)
                relax(dep[i],(b2+b1));
            relax(b2,(b1+b3)); relax(b1,(b2+b3));
        }
    }
}
void dfs2(int p,int lp){
    //if (g[p].size()==1) return;
    map<int,int>have,son;
    for (auto i:g[p]){
        have[dp[i].x+1]+=dp[i].y;
        son[dp[i].x+1]++;
    }
    for (auto i:g[p]){
        auto [d,c]=dp[i]; d++;
        pii tmp=dp[p];
        have[d]-=c; son[d]--;
        int have_find=0;
        if (have.count(a-d)&&have[a-d]){
            son[a-d]--;
            if (son.count(b)&&son[b])
                cnt=(cnt+(long long)c*have[a-d]),have_find=1;
            son[a-d]++;
        }
        if (have.count(b-d)&&have[b-d]){
            son[b-d]--;
            if (son.count(a)&&son[a])
                cnt=(cnt+(long long)c*have[b-d]),have_find=1;
            son[b-d]++;
        }
        if (!have_find) dp[p]={dp1[i].x-1,dp1[i].y};
        if (i!=lp)
            dfs2(i,p);
        dp[p]=tmp;
        have[d]+=c; son[d]++;
    }
}
signed main(){
    fast
    cin>>n;
    for (int i=1;i<n;i++){
        int a,b; cin>>a>>b;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    int root=0;
    for (int i=1;i<=n;i++){
        if (g[i].size()>1){
            root=i;
            break;
        }
    }
    dfs(root,0);
    dfs1(root,0,pii(-1,0));
    solve();
    dfs2(root,0);
    if (a==b) cnt/=2;
    if (ans<=0) cout<<0<<' '<<1<<'\n';
    else cout<<ans<<' '<<cnt/2<<'\n';
}

Compilation message

road.cpp:2:88: warning: bad option '-favx' to pragma 'optimize' [-Wpragmas]
    2 | #pragma GCC optimize("avx,avx2,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,fma,tune=native")
      |                                                                                        ^
road.cpp:2:88: warning: bad option '-favx2' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-fsse' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-fsse2' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-fsse3' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-fssse3' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-fsse4' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-fpopcnt' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-fabm' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-fmmx' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-ffma' to pragma 'optimize' [-Wpragmas]
road.cpp:2:88: warning: bad option '-ftune=native' to pragma 'optimize' [-Wpragmas]
road.cpp:20:22: warning: bad option '-favx' to attribute 'optimize' [-Wattributes]
   20 | void dfs(int p,int lp){
      |                      ^
road.cpp:20:22: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-fsse' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-fsse2' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-fsse3' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-fssse3' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-fsse4' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-fpopcnt' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-fabm' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-fmmx' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-ffma' to attribute 'optimize' [-Wattributes]
road.cpp:20:22: warning: bad option '-ftune=native' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-favx' to attribute 'optimize' [-Wattributes]
   35 | void dfs1(int p,int lp,pii val){
      |                               ^
road.cpp:35:31: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-fsse' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-fsse2' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-fsse3' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-fssse3' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-fsse4' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-fpopcnt' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-fabm' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-fmmx' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-ffma' to attribute 'optimize' [-Wattributes]
road.cpp:35:31: warning: bad option '-ftune=native' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-favx' to attribute 'optimize' [-Wattributes]
   57 | void relax(int x,int y){
      |                       ^
road.cpp:57:23: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-fsse' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-fsse2' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-fsse3' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-fssse3' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-fsse4' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-fpopcnt' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-fabm' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-fmmx' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-ffma' to attribute 'optimize' [-Wattributes]
road.cpp:57:23: warning: bad option '-ftune=native' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-favx' to attribute 'optimize' [-Wattributes]
   64 | void solve(){
      |            ^
road.cpp:64:12: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-fsse' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-fsse2' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-fsse3' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-fssse3' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-fsse4' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-fpopcnt' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-fabm' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-fmmx' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-ffma' to attribute 'optimize' [-Wattributes]
road.cpp:64:12: warning: bad option '-ftune=native' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-favx' to attribute 'optimize' [-Wattributes]
   81 | void dfs2(int p,int lp){
      |                       ^
road.cpp:81:23: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-fsse' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-fsse2' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-fsse3' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-fssse3' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-fsse4' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-fpopcnt' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-fabm' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-fmmx' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-ffma' to attribute 'optimize' [-Wattributes]
road.cpp:81:23: warning: bad option '-ftune=native' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-favx' to attribute 'optimize' [-Wattributes]
  112 | signed main(){
      |             ^
road.cpp:112:13: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-fsse' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-fsse2' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-fsse3' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-fssse3' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-fsse4' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-fpopcnt' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-fabm' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-fmmx' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-ffma' to attribute 'optimize' [-Wattributes]
road.cpp:112:13: warning: bad option '-ftune=native' to attribute 'optimize' [-Wattributes]

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 11988 KB Output is correct
3 Correct 8 ms 11988 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 10 ms 11988 KB Output is correct
6 Correct 10 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 8 ms 12116 KB Output is correct
9 Correct 9 ms 12016 KB Output is correct
10 Correct 7 ms 12116 KB Output is correct
11 Correct 10 ms 11988 KB Output is correct
12 Correct 8 ms 11988 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 7 ms 11988 KB Output is correct
15 Correct 8 ms 12116 KB Output is correct
16 Correct 8 ms 11988 KB Output is correct
17 Correct 8 ms 12116 KB Output is correct
18 Correct 8 ms 12004 KB Output is correct
19 Correct 7 ms 12084 KB Output is correct
20 Correct 9 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct
22 Correct 7 ms 11988 KB Output is correct
23 Correct 7 ms 11988 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 11988 KB Output is correct
3 Correct 8 ms 11988 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 10 ms 11988 KB Output is correct
6 Correct 10 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 8 ms 12116 KB Output is correct
9 Correct 9 ms 12016 KB Output is correct
10 Correct 7 ms 12116 KB Output is correct
11 Correct 10 ms 11988 KB Output is correct
12 Correct 8 ms 11988 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 7 ms 11988 KB Output is correct
15 Correct 8 ms 12116 KB Output is correct
16 Correct 8 ms 11988 KB Output is correct
17 Correct 8 ms 12116 KB Output is correct
18 Correct 8 ms 12004 KB Output is correct
19 Correct 7 ms 12084 KB Output is correct
20 Correct 9 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct
22 Correct 7 ms 11988 KB Output is correct
23 Correct 7 ms 11988 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct
25 Correct 11 ms 12912 KB Output is correct
26 Correct 11 ms 13260 KB Output is correct
27 Correct 10 ms 12812 KB Output is correct
28 Correct 11 ms 13396 KB Output is correct
29 Correct 13 ms 13368 KB Output is correct
30 Correct 19 ms 13532 KB Output is correct
31 Correct 11 ms 13524 KB Output is correct
32 Correct 15 ms 13140 KB Output is correct
33 Correct 13 ms 13224 KB Output is correct
34 Correct 11 ms 13524 KB Output is correct
35 Correct 11 ms 13396 KB Output is correct
36 Correct 13 ms 13268 KB Output is correct
37 Correct 11 ms 13652 KB Output is correct
38 Correct 12 ms 14552 KB Output is correct
39 Correct 11 ms 12976 KB Output is correct
40 Correct 14 ms 12648 KB Output is correct
41 Correct 12 ms 12500 KB Output is correct
42 Correct 11 ms 12372 KB Output is correct
43 Correct 16 ms 12312 KB Output is correct
44 Correct 11 ms 12360 KB Output is correct
45 Correct 11 ms 12244 KB Output is correct
46 Correct 10 ms 12244 KB Output is correct
47 Correct 14 ms 12324 KB Output is correct
48 Correct 10 ms 12364 KB Output is correct

Subtask #3
0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 11988 KB Output is correct
3 Correct 8 ms 11988 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 10 ms 11988 KB Output is correct
6 Correct 10 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 8 ms 12116 KB Output is correct
9 Correct 9 ms 12016 KB Output is correct
10 Correct 7 ms 12116 KB Output is correct
11 Correct 10 ms 11988 KB Output is correct
12 Correct 8 ms 11988 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 7 ms 11988 KB Output is correct
15 Correct 8 ms 12116 KB Output is correct
16 Correct 8 ms 11988 KB Output is correct
17 Correct 8 ms 12116 KB Output is correct
18 Correct 8 ms 12004 KB Output is correct
19 Correct 7 ms 12084 KB Output is correct
20 Correct 9 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct
22 Correct 7 ms 11988 KB Output is correct
23 Correct 7 ms 11988 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct
25 Correct 11 ms 12912 KB Output is correct
26 Correct 11 ms 13260 KB Output is correct
27 Correct 10 ms 12812 KB Output is correct
28 Correct 11 ms 13396 KB Output is correct
29 Correct 13 ms 13368 KB Output is correct
30 Correct 19 ms 13532 KB Output is correct
31 Correct 11 ms 13524 KB Output is correct
32 Correct 15 ms 13140 KB Output is correct
33 Correct 13 ms 13224 KB Output is correct
34 Correct 11 ms 13524 KB Output is correct
35 Correct 11 ms 13396 KB Output is correct
36 Correct 13 ms 13268 KB Output is correct
37 Correct 11 ms 13652 KB Output is correct
38 Correct 12 ms 14552 KB Output is correct
39 Correct 11 ms 12976 KB Output is correct
40 Correct 14 ms 12648 KB Output is correct
41 Correct 12 ms 12500 KB Output is correct
42 Correct 11 ms 12372 KB Output is correct
43 Correct 16 ms 12312 KB Output is correct
44 Correct 11 ms 12360 KB Output is correct
45 Correct 11 ms 12244 KB Output is correct
46 Correct 10 ms 12244 KB Output is correct
47 Correct 14 ms 12324 KB Output is correct
48 Correct 10 ms 12364 KB Output is correct
49 Correct 916 ms 121876 KB Output is correct
50 Correct 888 ms 137716 KB Output is correct
51 Correct 854 ms 151196 KB Output is correct
52 Correct 790 ms 103160 KB Output is correct
53 Incorrect 768 ms 173520 KB Output isn't correct
54 Halted 0 ms 0 KB -