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답안 #740549

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
740549 2023-05-12T17:05:02 Z victor_gao Hard route (IZhO17_road) C++17
52 / 100
 938 ms 173684 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 8 ms 11988 KB Output is correct
2 Correct 10 ms 11988 KB Output is correct
3 Correct 7 ms 11988 KB Output is correct
4 Correct 8 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 12092 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 8 ms 11988 KB Output is correct
9 Correct 7 ms 12004 KB Output is correct
10 Correct 8 ms 12092 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 9 ms 12036 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 12036 KB Output is correct
16 Correct 7 ms 12012 KB Output is correct
17 Correct 7 ms 12116 KB Output is correct
18 Correct 9 ms 12056 KB Output is correct
19 Correct 8 ms 12116 KB Output is correct
20 Correct 8 ms 11988 KB Output is correct
21 Correct 9 ms 11988 KB Output is correct
22 Correct 9 ms 12100 KB Output is correct
23 Correct 9 ms 12064 KB Output is correct
24 Correct 9 ms 12100 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 11988 KB Output is correct
2 Correct 10 ms 11988 KB Output is correct
3 Correct 7 ms 11988 KB Output is correct
4 Correct 8 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 12092 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 8 ms 11988 KB Output is correct
9 Correct 7 ms 12004 KB Output is correct
10 Correct 8 ms 12092 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 9 ms 12036 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 12036 KB Output is correct
16 Correct 7 ms 12012 KB Output is correct
17 Correct 7 ms 12116 KB Output is correct
18 Correct 9 ms 12056 KB Output is correct
19 Correct 8 ms 12116 KB Output is correct
20 Correct 8 ms 11988 KB Output is correct
21 Correct 9 ms 11988 KB Output is correct
22 Correct 9 ms 12100 KB Output is correct
23 Correct 9 ms 12064 KB Output is correct
24 Correct 9 ms 12100 KB Output is correct
25 Correct 11 ms 12984 KB Output is correct
26 Correct 14 ms 13236 KB Output is correct
27 Correct 11 ms 12884 KB Output is correct
28 Correct 14 ms 13396 KB Output is correct
29 Correct 14 ms 13268 KB Output is correct
30 Correct 14 ms 13524 KB Output is correct
31 Correct 12 ms 13536 KB Output is correct
32 Correct 11 ms 13140 KB Output is correct
33 Correct 13 ms 13268 KB Output is correct
34 Correct 12 ms 13524 KB Output is correct
35 Correct 12 ms 13384 KB Output is correct
36 Correct 16 ms 13260 KB Output is correct
37 Correct 15 ms 13652 KB Output is correct
38 Correct 15 ms 14488 KB Output is correct
39 Correct 10 ms 13012 KB Output is correct
40 Correct 11 ms 12708 KB Output is correct
41 Correct 10 ms 12500 KB Output is correct
42 Correct 10 ms 12372 KB Output is correct
43 Correct 10 ms 12372 KB Output is correct
44 Correct 13 ms 12244 KB Output is correct
45 Correct 11 ms 12244 KB Output is correct
46 Correct 10 ms 12244 KB Output is correct
47 Correct 11 ms 12372 KB Output is correct
48 Correct 12 ms 12372 KB Output is correct

Subtask #3
0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 11988 KB Output is correct
2 Correct 10 ms 11988 KB Output is correct
3 Correct 7 ms 11988 KB Output is correct
4 Correct 8 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 12092 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 8 ms 11988 KB Output is correct
9 Correct 7 ms 12004 KB Output is correct
10 Correct 8 ms 12092 KB Output is correct
11 Correct 7 ms 11988 KB Output is correct
12 Correct 9 ms 12036 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 12036 KB Output is correct
16 Correct 7 ms 12012 KB Output is correct
17 Correct 7 ms 12116 KB Output is correct
18 Correct 9 ms 12056 KB Output is correct
19 Correct 8 ms 12116 KB Output is correct
20 Correct 8 ms 11988 KB Output is correct
21 Correct 9 ms 11988 KB Output is correct
22 Correct 9 ms 12100 KB Output is correct
23 Correct 9 ms 12064 KB Output is correct
24 Correct 9 ms 12100 KB Output is correct
25 Correct 11 ms 12984 KB Output is correct
26 Correct 14 ms 13236 KB Output is correct
27 Correct 11 ms 12884 KB Output is correct
28 Correct 14 ms 13396 KB Output is correct
29 Correct 14 ms 13268 KB Output is correct
30 Correct 14 ms 13524 KB Output is correct
31 Correct 12 ms 13536 KB Output is correct
32 Correct 11 ms 13140 KB Output is correct
33 Correct 13 ms 13268 KB Output is correct
34 Correct 12 ms 13524 KB Output is correct
35 Correct 12 ms 13384 KB Output is correct
36 Correct 16 ms 13260 KB Output is correct
37 Correct 15 ms 13652 KB Output is correct
38 Correct 15 ms 14488 KB Output is correct
39 Correct 10 ms 13012 KB Output is correct
40 Correct 11 ms 12708 KB Output is correct
41 Correct 10 ms 12500 KB Output is correct
42 Correct 10 ms 12372 KB Output is correct
43 Correct 10 ms 12372 KB Output is correct
44 Correct 13 ms 12244 KB Output is correct
45 Correct 11 ms 12244 KB Output is correct
46 Correct 10 ms 12244 KB Output is correct
47 Correct 11 ms 12372 KB Output is correct
48 Correct 12 ms 12372 KB Output is correct
49 Correct 836 ms 122048 KB Output is correct
50 Correct 795 ms 137664 KB Output is correct
51 Correct 938 ms 151288 KB Output is correct
52 Correct 867 ms 103164 KB Output is correct
53 Incorrect 763 ms 173684 KB Output isn't correct
54 Halted 0 ms 0 KB -