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답안 #740545

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
740545 2023-05-12T17:00:16 Z victor_gao Hard route (IZhO17_road) C++17
52 / 100
 778 ms 173632 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]--;
        auto it=prev(have.end());
        while (it!=have.begin()&&(it->y)==0) it=prev(it);
        if (have.count(a-d)&&have[a-d]){
            son[a-d]--;
            if (son[b])
                cnt=(cnt+(long long)c*have[a-d]);
            son[a-d]++;
        }
        if (have.count(b-d)&&have[b-d]){
            son[b-d]--;
            if (son[a])
                cnt=(cnt+(long long)c*have[b-d]);
            son[b-d]++;
        }
        dp[p]=*it;
        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:113:13: warning: bad option '-favx' to attribute 'optimize' [-Wattributes]
  113 | signed main(){
      |             ^
road.cpp:113:13: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-fsse' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-fsse2' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-fsse3' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-fssse3' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-fsse4' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-fpopcnt' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-fabm' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-fmmx' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-ffma' to attribute 'optimize' [-Wattributes]
road.cpp:113:13: warning: bad option '-ftune=native' to attribute 'optimize' [-Wattributes]

Subtask #1
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 8 ms 11964 KB Output is correct
3 Correct 7 ms 11984 KB Output is correct
4 Correct 8 ms 11988 KB Output is correct
5 Correct 10 ms 11988 KB Output is correct
6 Correct 9 ms 11988 KB Output is correct
7 Correct 8 ms 11988 KB Output is correct
8 Correct 7 ms 12036 KB Output is correct
9 Correct 9 ms 11988 KB Output is correct
10 Correct 7 ms 12116 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 8 ms 12148 KB Output is correct
13 Correct 8 ms 12088 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 12092 KB Output is correct
17 Correct 10 ms 12120 KB Output is correct
18 Correct 8 ms 11988 KB Output is correct
19 Correct 10 ms 12116 KB Output is correct
20 Correct 8 ms 12092 KB Output is correct
21 Correct 7 ms 11988 KB Output is correct
22 Correct 7 ms 12060 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

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 8 ms 11964 KB Output is correct
3 Correct 7 ms 11984 KB Output is correct
4 Correct 8 ms 11988 KB Output is correct
5 Correct 10 ms 11988 KB Output is correct
6 Correct 9 ms 11988 KB Output is correct
7 Correct 8 ms 11988 KB Output is correct
8 Correct 7 ms 12036 KB Output is correct
9 Correct 9 ms 11988 KB Output is correct
10 Correct 7 ms 12116 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 8 ms 12148 KB Output is correct
13 Correct 8 ms 12088 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 12092 KB Output is correct
17 Correct 10 ms 12120 KB Output is correct
18 Correct 8 ms 11988 KB Output is correct
19 Correct 10 ms 12116 KB Output is correct
20 Correct 8 ms 12092 KB Output is correct
21 Correct 7 ms 11988 KB Output is correct
22 Correct 7 ms 12060 KB Output is correct
23 Correct 7 ms 11988 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct
25 Correct 10 ms 12976 KB Output is correct
26 Correct 10 ms 13236 KB Output is correct
27 Correct 12 ms 12884 KB Output is correct
28 Correct 11 ms 13448 KB Output is correct
29 Correct 11 ms 13328 KB Output is correct
30 Correct 11 ms 13476 KB Output is correct
31 Correct 15 ms 13444 KB Output is correct
32 Correct 11 ms 13188 KB Output is correct
33 Correct 12 ms 13268 KB Output is correct
34 Correct 15 ms 13536 KB Output is correct
35 Correct 11 ms 13400 KB Output is correct
36 Correct 11 ms 13292 KB Output is correct
37 Correct 11 ms 13652 KB Output is correct
38 Correct 12 ms 14520 KB Output is correct
39 Correct 11 ms 13092 KB Output is correct
40 Correct 11 ms 12752 KB Output is correct
41 Correct 11 ms 12500 KB Output is correct
42 Correct 11 ms 12372 KB Output is correct
43 Correct 14 ms 12372 KB Output is correct
44 Correct 14 ms 12244 KB Output is correct
45 Correct 10 ms 12332 KB Output is correct
46 Correct 9 ms 12244 KB Output is correct
47 Correct 11 ms 12372 KB Output is correct
48 Correct 9 ms 12372 KB Output is correct

Subtask #3
0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 8 ms 11964 KB Output is correct
3 Correct 7 ms 11984 KB Output is correct
4 Correct 8 ms 11988 KB Output is correct
5 Correct 10 ms 11988 KB Output is correct
6 Correct 9 ms 11988 KB Output is correct
7 Correct 8 ms 11988 KB Output is correct
8 Correct 7 ms 12036 KB Output is correct
9 Correct 9 ms 11988 KB Output is correct
10 Correct 7 ms 12116 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 8 ms 12148 KB Output is correct
13 Correct 8 ms 12088 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 12092 KB Output is correct
17 Correct 10 ms 12120 KB Output is correct
18 Correct 8 ms 11988 KB Output is correct
19 Correct 10 ms 12116 KB Output is correct
20 Correct 8 ms 12092 KB Output is correct
21 Correct 7 ms 11988 KB Output is correct
22 Correct 7 ms 12060 KB Output is correct
23 Correct 7 ms 11988 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct
25 Correct 10 ms 12976 KB Output is correct
26 Correct 10 ms 13236 KB Output is correct
27 Correct 12 ms 12884 KB Output is correct
28 Correct 11 ms 13448 KB Output is correct
29 Correct 11 ms 13328 KB Output is correct
30 Correct 11 ms 13476 KB Output is correct
31 Correct 15 ms 13444 KB Output is correct
32 Correct 11 ms 13188 KB Output is correct
33 Correct 12 ms 13268 KB Output is correct
34 Correct 15 ms 13536 KB Output is correct
35 Correct 11 ms 13400 KB Output is correct
36 Correct 11 ms 13292 KB Output is correct
37 Correct 11 ms 13652 KB Output is correct
38 Correct 12 ms 14520 KB Output is correct
39 Correct 11 ms 13092 KB Output is correct
40 Correct 11 ms 12752 KB Output is correct
41 Correct 11 ms 12500 KB Output is correct
42 Correct 11 ms 12372 KB Output is correct
43 Correct 14 ms 12372 KB Output is correct
44 Correct 14 ms 12244 KB Output is correct
45 Correct 10 ms 12332 KB Output is correct
46 Correct 9 ms 12244 KB Output is correct
47 Correct 11 ms 12372 KB Output is correct
48 Correct 9 ms 12372 KB Output is correct
49 Correct 743 ms 121816 KB Output is correct
50 Correct 778 ms 137720 KB Output is correct
51 Correct 777 ms 151256 KB Output is correct
52 Correct 722 ms 103188 KB Output is correct
53 Incorrect 647 ms 173632 KB Output isn't correct
54 Halted 0 ms 0 KB -