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답안 #1105880

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1105880 2024-10-28T08:32:54 Z vjudge1 Tree Rotations (POI11_rot) C++17
100 / 100
 332 ms 48448 KB 
#include <bits/stdc++.h>
#define ii pair<int, int>
#define fi first
#define se second
#define inf 0x3f3f3f3f3f3f3f3f
using namespace std;
using ll = long long;
const ll mod=1e9+7;
const int nx=4e5+5;
int n, bit[nx], root, cur, sz[nx];
vector<int> adj[nx], a[nx];
bool big[nx];
ll ans=0;
void upd(int x, int val)
{
    for(; x <= n; x+=x&-x)
        bit[x]+=val;
}
int get(int x)
{
    int res=0;
    for(; x > 0; x-=x&-x)
        res+=bit[x];
    return res;
}
int go()
{
    int u;
    cin>>u;
    if(!u)
    {
        int l=go();
        int r=go();
        cur++;
        adj[cur].emplace_back(l);
        adj[cur].emplace_back(r);
        return cur;
    }
    else return u;
}
int dfs1(int u)
{
    sz[u]=1;
    for(int v:adj[u])
        sz[u]+=dfs1(v);
    return sz[u];
}
void add(int u, int x)
{
    upd(u, x);
    for(int v:adj[u])
        if(!big[v])
            add(v, x);
}
void dfs(int u, bool keep)
{
    if(u<=n)
        a[u].emplace_back(u);
    int mx=-1, bc=-1, sc=-1;
    for(int v:adj[u])
        if(sz[v]>mx)
            mx=sz[v], bc=v;
    for(int v:adj[u])
        if(v!=bc)
            dfs(v, 0), sc=v;
    if(bc!=-1)
        dfs(bc, 1), big[bc]=1;
    if(sc!=-1)
    {
        ll l=0, r=0;
        for(int c:a[sc])
            l+=get(c-1), r+=get(n)-get(c);
        ans+=min(l, r);
    }
    if(bc!=-1 && sc!=-1)
    {
        swap(a[u], a[bc]);
        for(int c:a[sc])
            a[u].emplace_back(c);
        a[sc].clear();
    }
    add(u, 1);
    if(bc!=-1)
        big[bc]=0;
    if(!keep)
        add(u, -1);
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n;
    cur=n;
    root=go();
    dfs1(root);
    dfs(root, 0);
    cout<<ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 20816 KB Output is correct
2 Correct 3 ms 20816 KB Output is correct
3 Correct 4 ms 20984 KB Output is correct
4 Correct 4 ms 20816 KB Output is correct
5 Correct 3 ms 20816 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 20816 KB Output is correct
2 Correct 3 ms 20816 KB Output is correct
3 Correct 4 ms 20988 KB Output is correct
4 Correct 5 ms 20816 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 20816 KB Output is correct
2 Correct 4 ms 21072 KB Output is correct
3 Correct 4 ms 20952 KB Output is correct
4 Correct 4 ms 21044 KB Output is correct

Subtask #4
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 21584 KB Output is correct
2 Correct 7 ms 21328 KB Output is correct
3 Correct 6 ms 21584 KB Output is correct
4 Correct 7 ms 21584 KB Output is correct

Subtask #5
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23132 KB Output is correct
2 Correct 13 ms 22264 KB Output is correct
3 Correct 38 ms 24216 KB Output is correct
4 Correct 12 ms 22788 KB Output is correct

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 26308 KB Output is correct
2 Correct 35 ms 27464 KB Output is correct
3 Correct 45 ms 29460 KB Output is correct
4 Correct 42 ms 29512 KB Output is correct

Subtask #7
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 54 ms 36296 KB Output is correct
2 Correct 55 ms 33096 KB Output is correct
3 Correct 70 ms 31180 KB Output is correct
4 Correct 50 ms 29380 KB Output is correct

Subtask #8
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 82 ms 31796 KB Output is correct
2 Correct 73 ms 33352 KB Output is correct
3 Correct 76 ms 37704 KB Output is correct
4 Correct 79 ms 37448 KB Output is correct

Subtask #9
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 210 ms 43444 KB Output is correct
2 Correct 128 ms 39624 KB Output is correct
3 Correct 145 ms 39108 KB Output is correct
4 Correct 149 ms 39084 KB Output is correct
5 Correct 298 ms 40000 KB Output is correct

Subtask #10
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 162 ms 39360 KB Output is correct
2 Correct 152 ms 47760 KB Output is correct
3 Correct 217 ms 45036 KB Output is correct
4 Correct 140 ms 48448 KB Output is correct
5 Correct 300 ms 43132 KB Output is correct

Subtask #11
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 167 ms 40396 KB Output is correct
2 Correct 154 ms 40928 KB Output is correct
3 Correct 219 ms 41036 KB Output is correct
4 Correct 197 ms 40520 KB Output is correct
5 Correct 159 ms 48064 KB Output is correct
6 Correct 332 ms 43716 KB Output is correct