oj.uz

답안 #919348

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
919348 2024-01-31T15:52:16 Z imarn Mergers (JOI19_mergers) C++14
24 / 100
 581 ms 74188 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vvi vector<vi>
#define vp vector<pii>
using namespace std;
const int N=5e5+5;
vector<int>g[N],gg[N];
int sz[N],id[N],pr[N],head[N],dep[N],cur=0,t[4*N],lz[4*N],pos[N],cp=1,n;
void push(int i,int l,int r){
    t[i]=min(t[i],lz[i]);
    if(l<r){
        lz[2*i]=min(lz[2*i],lz[i]);
        lz[2*i+1]=min(lz[2*i+1],lz[i]);
    }lz[i]=1e9;
}
void upd(int i,int l,int r,int tl,int tr,int id){
    push(i,l,r);
    if(r<tl||l>tr)return;
    if(r<=tr&&l>=tl){
        lz[i]=min(lz[i],id);push(i,l,r);
        return;
    }int m=(l+r)>>1;
    upd(2*i,l,m,tl,tr,id);upd(2*i+1,m+1,r,tl,tr,id);
    t[i]=min(t[2*i],t[2*i+1]);
}
int qr(int i,int l,int r,int tl,int tr){
    push(i,l,r);
    if(r<tl||l>tr)return 1e9;
    if(r<=tr&&l>=tl)return t[i];
    int m=(l+r)>>1;
    return min(qr(2*i,l,m,tl,tr),qr(2*i+1,m+1,r,tl,tr));
}
void update(int x,int y,int z){
    while(head[x]!=head[y]){
        if(dep[head[x]]<dep[head[y]])swap(x,y);
        upd(1,1,n,id[head[x]],id[x],z);
        x=pr[head[x]];
    }if(dep[x]>dep[y])swap(x,y);
    upd(1,1,n,id[x],id[y],z);
}
int query(int x,int y,int res=1e9){
    while(head[x]!=head[y]){
        if(dep[head[x]]<dep[head[y]])swap(x,y);
        res=min(qr(1,1,n,id[head[x]],id[x]),res);
        x=pr[head[x]];
    }if(dep[x]>dep[y])swap(x,y);
    res=min(res,qr(1,1,n,id[x],id[y]));return res;
}
void dfssz(int u,int p,int l){
    sz[u]=1;dep[u]=l;pr[u]=p;
    for(auto v:g[u]){
        if(v==p)continue;dfssz(v,u,l+1);
        sz[u]+=sz[v];
    }
}
void hld(int u,int p,int tp){
    head[u]=tp;id[u]=++cur;
    int hc=-1,hv=-1;
    for(auto v:g[u]){
        if(v==p)continue;
        if(sz[v]>hc)hv=v,hc=sz[v];
    }if(hv==-1)return;
    hld(hv,u,tp);
    for(auto v:g[u]){
        if(v==p||v==hv)continue;
        hld(v,u,v);
    }
}vector<int>gr[N];
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int k;cin>>n>>k;
    for(int i=0;i<4*N;i++)t[i]=lz[i]=1e9;
    for(int i=1;i<=n-1;i++){
        int u,v;cin>>u>>v;g[u].pb(v);g[v].pb(u);
    }dfssz(1,1,0);hld(1,1,1);
    for(int i=1,x;i<=n;i++)cin>>x,gr[x].pb(i);
    for(int i=1;i<=k;i++){
        if(gr[i].empty())continue;
        int res=cp;res=min(res,query(gr[i][0],gr[i][0]));
        for(int j=1;j<gr[i].size();j++)res=min(res,query(gr[i][j-1],gr[i][j]));
        update(gr[i][0],gr[i][0],res);
        for(int j=1;j<gr[i].size();j++)update(gr[i][j-1],gr[i][j],res);
        cp++;
    }for(int i=1;i<=n;i++)pos[i]=qr(1,1,n,id[i],id[i]);
    for(int i=1;i<=n;i++){
        for(auto v:g[i]){
            if(pos[v]==pos[i])continue;
            gg[pos[v]].pb(pos[i]);
            gg[pos[i]].pb(pos[v]);
        }
    }int ct=0;
    for(int i=1;i<=n;i++){
        if(gg[i].empty())continue;
        sort(gg[i].begin(),gg[i].end());
        gg[i].erase(unique(gg[i].begin(),gg[i].end()),gg[i].end());
        if(gg[i].size()==1)ct++;
    }cout<<(ct+1)/2;
}

Compilation message

mergers.cpp: In function 'void dfssz(int, int, int)':
mergers.cpp:59:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   59 |         if(v==p)continue;dfssz(v,u,l+1);
      |         ^~
mergers.cpp:59:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   59 |         if(v==p)continue;dfssz(v,u,l+1);
      |                          ^~~~~
mergers.cpp: In function 'int main()':
mergers.cpp:87:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |         for(int j=1;j<gr[i].size();j++)res=min(res,query(gr[i][j-1],gr[i][j]));
      |                     ~^~~~~~~~~~~~~
mergers.cpp:89:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |         for(int j=1;j<gr[i].size();j++)update(gr[i][j-1],gr[i][j],res);
      |                     ~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 63064 KB Output is correct
2 Correct 18 ms 63320 KB Output is correct
3 Correct 17 ms 63076 KB Output is correct
4 Correct 18 ms 63268 KB Output is correct
5 Correct 16 ms 63072 KB Output is correct
6 Correct 17 ms 62992 KB Output is correct
7 Correct 16 ms 63076 KB Output is correct
8 Correct 16 ms 63064 KB Output is correct
9 Correct 16 ms 63064 KB Output is correct
10 Correct 18 ms 63068 KB Output is correct
11 Correct 16 ms 63064 KB Output is correct
12 Correct 17 ms 63064 KB Output is correct
13 Correct 16 ms 63068 KB Output is correct
14 Correct 18 ms 63068 KB Output is correct
15 Correct 18 ms 63068 KB Output is correct
16 Correct 18 ms 62820 KB Output is correct
17 Correct 17 ms 63064 KB Output is correct
18 Correct 16 ms 63064 KB Output is correct
19 Correct 17 ms 63064 KB Output is correct
20 Correct 16 ms 63068 KB Output is correct
21 Correct 16 ms 63064 KB Output is correct
22 Correct 17 ms 63064 KB Output is correct
23 Correct 17 ms 63048 KB Output is correct
24 Correct 17 ms 63064 KB Output is correct

Subtask #2
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 63064 KB Output is correct
2 Correct 18 ms 63320 KB Output is correct
3 Correct 17 ms 63076 KB Output is correct
4 Correct 18 ms 63268 KB Output is correct
5 Correct 16 ms 63072 KB Output is correct
6 Correct 17 ms 62992 KB Output is correct
7 Correct 16 ms 63076 KB Output is correct
8 Correct 16 ms 63064 KB Output is correct
9 Correct 16 ms 63064 KB Output is correct
10 Correct 18 ms 63068 KB Output is correct
11 Correct 16 ms 63064 KB Output is correct
12 Correct 17 ms 63064 KB Output is correct
13 Correct 16 ms 63068 KB Output is correct
14 Correct 18 ms 63068 KB Output is correct
15 Correct 18 ms 63068 KB Output is correct
16 Correct 18 ms 62820 KB Output is correct
17 Correct 17 ms 63064 KB Output is correct
18 Correct 16 ms 63064 KB Output is correct
19 Correct 17 ms 63064 KB Output is correct
20 Correct 16 ms 63068 KB Output is correct
21 Correct 16 ms 63064 KB Output is correct
22 Correct 17 ms 63064 KB Output is correct
23 Correct 17 ms 63048 KB Output is correct
24 Correct 17 ms 63064 KB Output is correct
25 Correct 17 ms 63064 KB Output is correct
26 Correct 20 ms 63064 KB Output is correct
27 Correct 21 ms 63064 KB Output is correct
28 Correct 20 ms 63456 KB Output is correct
29 Correct 20 ms 63320 KB Output is correct
30 Correct 23 ms 63064 KB Output is correct
31 Correct 16 ms 63064 KB Output is correct
32 Correct 19 ms 63320 KB Output is correct
33 Correct 17 ms 63068 KB Output is correct
34 Correct 23 ms 63064 KB Output is correct
35 Correct 19 ms 63560 KB Output is correct
36 Correct 21 ms 63052 KB Output is correct
37 Incorrect 24 ms 63064 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 63064 KB Output is correct
2 Correct 18 ms 63320 KB Output is correct
3 Correct 17 ms 63076 KB Output is correct
4 Correct 18 ms 63268 KB Output is correct
5 Correct 16 ms 63072 KB Output is correct
6 Correct 17 ms 62992 KB Output is correct
7 Correct 16 ms 63076 KB Output is correct
8 Correct 16 ms 63064 KB Output is correct
9 Correct 16 ms 63064 KB Output is correct
10 Correct 18 ms 63068 KB Output is correct
11 Correct 16 ms 63064 KB Output is correct
12 Correct 17 ms 63064 KB Output is correct
13 Correct 16 ms 63068 KB Output is correct
14 Correct 18 ms 63068 KB Output is correct
15 Correct 18 ms 63068 KB Output is correct
16 Correct 18 ms 62820 KB Output is correct
17 Correct 17 ms 63064 KB Output is correct
18 Correct 16 ms 63064 KB Output is correct
19 Correct 17 ms 63064 KB Output is correct
20 Correct 16 ms 63068 KB Output is correct
21 Correct 16 ms 63064 KB Output is correct
22 Correct 17 ms 63064 KB Output is correct
23 Correct 17 ms 63048 KB Output is correct
24 Correct 17 ms 63064 KB Output is correct
25 Correct 18 ms 63048 KB Output is correct
26 Correct 214 ms 67176 KB Output is correct
27 Correct 529 ms 66828 KB Output is correct
28 Correct 20 ms 63320 KB Output is correct
29 Correct 18 ms 63064 KB Output is correct
30 Correct 16 ms 63064 KB Output is correct
31 Correct 401 ms 66800 KB Output is correct
32 Correct 20 ms 63064 KB Output is correct
33 Correct 206 ms 74000 KB Output is correct
34 Correct 581 ms 66884 KB Output is correct
35 Correct 25 ms 63192 KB Output is correct
36 Correct 198 ms 67524 KB Output is correct
37 Correct 25 ms 63064 KB Output is correct
38 Correct 25 ms 63064 KB Output is correct
39 Correct 223 ms 66888 KB Output is correct
40 Correct 19 ms 63576 KB Output is correct
41 Correct 575 ms 66764 KB Output is correct
42 Correct 222 ms 69172 KB Output is correct
43 Correct 17 ms 63064 KB Output is correct
44 Correct 206 ms 74188 KB Output is correct
45 Correct 224 ms 70476 KB Output is correct
46 Correct 23 ms 63064 KB Output is correct
47 Correct 24 ms 63068 KB Output is correct

Subtask #4
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 232 ms 67168 KB Output is correct
2 Correct 182 ms 73416 KB Output is correct
3 Correct 21 ms 63072 KB Output is correct
4 Correct 20 ms 63064 KB Output is correct
5 Correct 16 ms 63064 KB Output is correct
6 Correct 17 ms 63044 KB Output is correct
7 Correct 23 ms 63064 KB Output is correct
8 Incorrect 257 ms 68396 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 63064 KB Output is correct
2 Correct 18 ms 63320 KB Output is correct
3 Correct 17 ms 63076 KB Output is correct
4 Correct 18 ms 63268 KB Output is correct
5 Correct 16 ms 63072 KB Output is correct
6 Correct 17 ms 62992 KB Output is correct
7 Correct 16 ms 63076 KB Output is correct
8 Correct 16 ms 63064 KB Output is correct
9 Correct 16 ms 63064 KB Output is correct
10 Correct 18 ms 63068 KB Output is correct
11 Correct 16 ms 63064 KB Output is correct
12 Correct 17 ms 63064 KB Output is correct
13 Correct 16 ms 63068 KB Output is correct
14 Correct 18 ms 63068 KB Output is correct
15 Correct 18 ms 63068 KB Output is correct
16 Correct 18 ms 62820 KB Output is correct
17 Correct 17 ms 63064 KB Output is correct
18 Correct 16 ms 63064 KB Output is correct
19 Correct 17 ms 63064 KB Output is correct
20 Correct 16 ms 63068 KB Output is correct
21 Correct 16 ms 63064 KB Output is correct
22 Correct 17 ms 63064 KB Output is correct
23 Correct 17 ms 63048 KB Output is correct
24 Correct 17 ms 63064 KB Output is correct
25 Correct 17 ms 63064 KB Output is correct
26 Correct 20 ms 63064 KB Output is correct
27 Correct 21 ms 63064 KB Output is correct
28 Correct 20 ms 63456 KB Output is correct
29 Correct 20 ms 63320 KB Output is correct
30 Correct 23 ms 63064 KB Output is correct
31 Correct 16 ms 63064 KB Output is correct
32 Correct 19 ms 63320 KB Output is correct
33 Correct 17 ms 63068 KB Output is correct
34 Correct 23 ms 63064 KB Output is correct
35 Correct 19 ms 63560 KB Output is correct
36 Correct 21 ms 63052 KB Output is correct
37 Incorrect 24 ms 63064 KB Output isn't correct
38 Halted 0 ms 0 KB -