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답안 #740550

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
740550 2023-05-12T17:05:43 Z victor_gao Hard route (IZhO17_road) C++17
52 / 100
 774 ms 173516 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.count(b)&&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.count(a)&&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 9 ms 11988 KB Output is correct
3 Correct 7 ms 12088 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 7 ms 12108 KB Output is correct
10 Correct 7 ms 12112 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 8 ms 12116 KB Output is correct
15 Correct 7 ms 12116 KB Output is correct
16 Correct 9 ms 12108 KB Output is correct
17 Correct 7 ms 11988 KB Output is correct
18 Correct 7 ms 11988 KB Output is correct
19 Correct 7 ms 12116 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 7 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

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 9 ms 11988 KB Output is correct
3 Correct 7 ms 12088 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 7 ms 12108 KB Output is correct
10 Correct 7 ms 12112 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 8 ms 12116 KB Output is correct
15 Correct 7 ms 12116 KB Output is correct
16 Correct 9 ms 12108 KB Output is correct
17 Correct 7 ms 11988 KB Output is correct
18 Correct 7 ms 11988 KB Output is correct
19 Correct 7 ms 12116 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 7 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 10 ms 12964 KB Output is correct
26 Correct 11 ms 13268 KB Output is correct
27 Correct 11 ms 12884 KB Output is correct
28 Correct 12 ms 13396 KB Output is correct
29 Correct 11 ms 13268 KB Output is correct
30 Correct 12 ms 13536 KB Output is correct
31 Correct 10 ms 13524 KB Output is correct
32 Correct 10 ms 13108 KB Output is correct
33 Correct 10 ms 13224 KB Output is correct
34 Correct 11 ms 13524 KB Output is correct
35 Correct 10 ms 13400 KB Output is correct
36 Correct 10 ms 13268 KB Output is correct
37 Correct 11 ms 13584 KB Output is correct
38 Correct 12 ms 14548 KB Output is correct
39 Correct 11 ms 13012 KB Output is correct
40 Correct 12 ms 12628 KB Output is correct
41 Correct 12 ms 12532 KB Output is correct
42 Correct 12 ms 12316 KB Output is correct
43 Correct 9 ms 12320 KB Output is correct
44 Correct 10 ms 12356 KB Output is correct
45 Correct 10 ms 12244 KB Output is correct
46 Correct 9 ms 12244 KB Output is correct
47 Correct 10 ms 12368 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 9 ms 11988 KB Output is correct
3 Correct 7 ms 12088 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 7 ms 12108 KB Output is correct
10 Correct 7 ms 12112 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 8 ms 12116 KB Output is correct
15 Correct 7 ms 12116 KB Output is correct
16 Correct 9 ms 12108 KB Output is correct
17 Correct 7 ms 11988 KB Output is correct
18 Correct 7 ms 11988 KB Output is correct
19 Correct 7 ms 12116 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 7 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 10 ms 12964 KB Output is correct
26 Correct 11 ms 13268 KB Output is correct
27 Correct 11 ms 12884 KB Output is correct
28 Correct 12 ms 13396 KB Output is correct
29 Correct 11 ms 13268 KB Output is correct
30 Correct 12 ms 13536 KB Output is correct
31 Correct 10 ms 13524 KB Output is correct
32 Correct 10 ms 13108 KB Output is correct
33 Correct 10 ms 13224 KB Output is correct
34 Correct 11 ms 13524 KB Output is correct
35 Correct 10 ms 13400 KB Output is correct
36 Correct 10 ms 13268 KB Output is correct
37 Correct 11 ms 13584 KB Output is correct
38 Correct 12 ms 14548 KB Output is correct
39 Correct 11 ms 13012 KB Output is correct
40 Correct 12 ms 12628 KB Output is correct
41 Correct 12 ms 12532 KB Output is correct
42 Correct 12 ms 12316 KB Output is correct
43 Correct 9 ms 12320 KB Output is correct
44 Correct 10 ms 12356 KB Output is correct
45 Correct 10 ms 12244 KB Output is correct
46 Correct 9 ms 12244 KB Output is correct
47 Correct 10 ms 12368 KB Output is correct
48 Correct 9 ms 12372 KB Output is correct
49 Correct 774 ms 121904 KB Output is correct
50 Correct 742 ms 137728 KB Output is correct
51 Correct 764 ms 151192 KB Output is correct
52 Correct 754 ms 103116 KB Output is correct
53 Incorrect 648 ms 173516 KB Output isn't correct
54 Halted 0 ms 0 KB -