oj.uz

답안 #1020437

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1020437 2024-07-12T04:28:07 Z vjudge1 Tree Rotations (POI11_rot) C++17
100 / 100
 232 ms 47404 KB 
//#pragma GCC optimize("O3","unroll-loops")
#include<bits/stdc++.h>
#define all(x) (x).begin() , (x).end()
#define pll pair<long long, long long>
#define pii pair<int , int>
#define fi first
#define se second
#define bit(i,j) ((j >> i) & 1)
using namespace std;

const long long inf = 1e18+1;
const int mod = 1e9+7;
const int MAXN = 1e6+100;

#define int long long

int bit[MAXN] , n;
void upd(int x , int val){
	while(x <= n){
		bit[x] += val;
		x += (x & (-x));
	}
}
int get(int x){
	int res = 0;
	while(x > 0){
		res += bit[x];
		x -= (x & (-x));
	}
	return res;
}

vector<int> adj[MAXN];
int id = 1 , c[MAXN] , sz[MAXN];
void Input(){
	int x; cin >> x;
	c[id] = x;
	if(x!=0) return;
	int t = id;
	adj[t].push_back(id+1);
	id++ ; Input();
	adj[t].push_back(id+1);
	id++ ; Input();
}

void dfs_sz(int u){
	sz[u] = 1;
	for(auto v : adj[u]) dfs_sz(v) , sz[u] += sz[v];
}
void modify(int u , int val){
	if(adj[u].size() == 0){
		upd(c[u] , val); return;
	}
	for(auto v : adj[u]) modify(v , val);
}
int cnt1 = 0 , cnt2 = 0;
void cal(int u){
	if(adj[u].size() == 0){
		cnt1 += get(c[u] - 1);
		cnt2 += get(n) - get(c[u]);
		return;
	}
	for(auto v : adj[u]) cal(v);
}
int ans[MAXN];
void dfs(int u){
	if(adj[u].size() == 0){
		upd(c[u] , 1); return;
	}
	int bc = (sz[adj[u][0]] > sz[adj[u][1]] ? 0 : 1);
	int sc = bc ^ 1;
	bc = adj[u][bc]; sc = adj[u][sc];
	dfs(sc);
	modify(sc , -1);
	dfs(bc);
	cnt1 = cnt2 = 0;
	cal(sc);
	modify(sc , 1);
	ans[u] = ans[bc] + ans[sc] + min(cnt1 , cnt2);
}
int32_t main(){
  	//freopen("TRAVEL.INP", "r", stdin);
	//freopen("Nowruz.out", "w", stdout);
	ios_base::sync_with_stdio(0); cin.tie(0);
	
	cin >> n;
	Input();
	dfs_sz(1);
	dfs(1);
	cout << ans[1] << "\n";

	return 0;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23940 KB Output is correct
2 Correct 17 ms 23900 KB Output is correct
3 Correct 14 ms 23900 KB Output is correct
4 Correct 12 ms 23868 KB Output is correct
5 Correct 12 ms 23900 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23900 KB Output is correct
2 Correct 11 ms 23896 KB Output is correct
3 Correct 15 ms 23900 KB Output is correct
4 Correct 11 ms 23900 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23952 KB Output is correct
2 Correct 11 ms 23896 KB Output is correct
3 Correct 14 ms 23900 KB Output is correct
4 Correct 12 ms 23844 KB Output is correct

Subtask #4
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 24300 KB Output is correct
2 Correct 16 ms 24092 KB Output is correct
3 Correct 12 ms 24412 KB Output is correct
4 Correct 14 ms 24412 KB Output is correct

Subtask #5
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 25448 KB Output is correct
2 Correct 18 ms 24912 KB Output is correct
3 Correct 36 ms 26372 KB Output is correct
4 Correct 26 ms 25288 KB Output is correct

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 58 ms 28308 KB Output is correct
2 Correct 38 ms 29020 KB Output is correct
3 Correct 44 ms 30292 KB Output is correct
4 Correct 47 ms 30556 KB Output is correct

Subtask #7
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 35412 KB Output is correct
2 Correct 48 ms 33616 KB Output is correct
3 Correct 59 ms 32396 KB Output is correct
4 Correct 53 ms 31568 KB Output is correct

Subtask #8
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 34192 KB Output is correct
2 Correct 60 ms 35152 KB Output is correct
3 Correct 67 ms 37628 KB Output is correct
4 Correct 62 ms 37464 KB Output is correct

Subtask #9
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 162 ms 41028 KB Output is correct
2 Correct 117 ms 40012 KB Output is correct
3 Correct 106 ms 40060 KB Output is correct
4 Correct 120 ms 40520 KB Output is correct
5 Correct 187 ms 39508 KB Output is correct

Subtask #10
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 113 ms 41812 KB Output is correct
2 Correct 112 ms 46528 KB Output is correct
3 Correct 154 ms 45000 KB Output is correct
4 Correct 99 ms 46328 KB Output is correct
5 Correct 232 ms 40468 KB Output is correct

Subtask #11
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 126 ms 41132 KB Output is correct
2 Correct 100 ms 42576 KB Output is correct
3 Correct 192 ms 41196 KB Output is correct
4 Correct 141 ms 41376 KB Output is correct
5 Correct 96 ms 47404 KB Output is correct
6 Correct 217 ms 41040 KB Output is correct