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답안 #711935

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
711935 2023-03-17T17:03:59 Z Hoff22 경주 (Race) (IOI11_race) C++17
100 / 100
 960 ms 117732 KB 
#include "race.h"
#include <bits/stdc++.h>
 
#define N 200000
#define MAX 1000000000
#define E 0.00000001
#define MOD 1000000007
#define INF 0x3f3f3f3f
#define INFll 0x3f3f3f3f3f3f3f3fll
#define LEFT(x) (2 * x)
#define RIGHT(x) (2 * x + 1)
#define se second
#define fi first
 
using namespace std;
 
typedef long long ll;
 
vector<int> g[N+1];
map<pair<int,int>, ll> e;
map<ll,int, greater<ll>> d[N+1];
ll dist[N+1];
int sz[N+1];
int ans = -1;
 
void prec(ll u, ll p){
	if(u != 1) dist[u] = dist[p] + e[{u,p}];
	for(ll v : g[u]){
		if(v == p) continue;
		prec(v, u);
	}
}
 
void solve(int u, int p, int depth, ll k){
	
	int big = -1;
	sz[u] = 1;
	
	for(int v : g[u]){
		if(v == p) continue;
		solve(v, u, depth+1, k);
		sz[u] += sz[v];
		if(big == -1 or sz[v] > sz[big]) big = v;
	}
 
	if(big == -1){
		d[u][dist[u]] = depth;	
		return;
	}
 
	swap(d[u], d[big]);
 
	d[u][dist[u]] = depth;

	for(int v : g[u]){
		if(v == p or v == big) continue; 
		for(auto i : d[v]){
			ll want = k + 2 * dist[u] - i.fi;

			if(d[u].count(want)){
				if(ans == -1) ans = (i.se - depth) + (d[u][want] - depth); 
				else ans = min(ans, (i.se - depth) + (d[u][want] - depth));
			}
		}
		for(auto i : d[v]){
			if(d[u].count(i.fi)){
				d[u][i.fi] = min(d[u][i.fi], i.se);
			}
			else{
				d[u][i.fi] = i.se;
			}
		}
	}

	if(d[u].count(k + dist[u])){
		if(ans == -1) ans = d[u][k + dist[u]] - depth;
		else  ans = min(ans, d[u][k + dist[u]] - depth);
	}
}
 
int best_path(int n, int k, int (*h)[2], int* l){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
 
	for(ll i = 0; i <= n; i++){
		g[i].clear();
		dist[i] = 0;
		sz[i] = 0;
		d[i].clear();
	}
	ans = -1;
	e.clear();
 
	for(ll i = 0; i < n-1; i++){
		ll u, v, w;
		u = h[i][0];
		v = h[i][1];
		w = l[i];
 
		u++;
		v++;
 
		g[u].push_back(v);
		g[v].push_back(u);
		e[{u,v}] = w;
		e[{v,u}] = w;
	}
 
	prec(1,0);
	solve(1, 0, 0, k);
 
	return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 7 ms 14448 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 8 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 8 ms 14456 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14444 KB Output is correct
10 Correct 10 ms 14400 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 8 ms 14456 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 8 ms 14420 KB Output is correct
16 Correct 11 ms 14432 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 7 ms 14480 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 7 ms 14448 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 8 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 8 ms 14456 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14444 KB Output is correct
10 Correct 10 ms 14400 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 8 ms 14456 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 8 ms 14420 KB Output is correct
16 Correct 11 ms 14432 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 7 ms 14480 KB Output is correct
19 Correct 7 ms 14420 KB Output is correct
20 Correct 7 ms 14420 KB Output is correct
21 Correct 9 ms 14768 KB Output is correct
22 Correct 9 ms 14804 KB Output is correct
23 Correct 8 ms 14800 KB Output is correct
24 Correct 9 ms 14804 KB Output is correct
25 Correct 11 ms 14744 KB Output is correct
26 Correct 9 ms 14804 KB Output is correct
27 Correct 8 ms 14676 KB Output is correct
28 Correct 9 ms 14804 KB Output is correct
29 Correct 10 ms 14804 KB Output is correct
30 Correct 9 ms 14796 KB Output is correct
31 Correct 9 ms 14796 KB Output is correct
32 Correct 9 ms 14760 KB Output is correct
33 Correct 9 ms 14804 KB Output is correct
34 Correct 9 ms 14676 KB Output is correct
35 Correct 9 ms 14664 KB Output is correct
36 Correct 9 ms 14764 KB Output is correct
37 Correct 9 ms 14676 KB Output is correct
38 Correct 9 ms 14664 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 7 ms 14448 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 8 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 8 ms 14456 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14444 KB Output is correct
10 Correct 10 ms 14400 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 8 ms 14456 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 8 ms 14420 KB Output is correct
16 Correct 11 ms 14432 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 7 ms 14480 KB Output is correct
19 Correct 215 ms 43688 KB Output is correct
20 Correct 233 ms 44824 KB Output is correct
21 Correct 248 ms 44892 KB Output is correct
22 Correct 370 ms 45136 KB Output is correct
23 Correct 346 ms 58384 KB Output is correct
24 Correct 326 ms 51376 KB Output is correct
25 Correct 236 ms 44348 KB Output is correct
26 Correct 121 ms 52472 KB Output is correct
27 Correct 480 ms 66776 KB Output is correct
28 Correct 623 ms 103496 KB Output is correct
29 Correct 623 ms 101652 KB Output is correct
30 Correct 453 ms 66688 KB Output is correct
31 Correct 466 ms 66724 KB Output is correct
32 Correct 803 ms 66700 KB Output is correct
33 Correct 655 ms 66276 KB Output is correct
34 Correct 682 ms 98860 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 7 ms 14448 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 8 ms 14420 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 8 ms 14456 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 7 ms 14444 KB Output is correct
10 Correct 10 ms 14400 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 8 ms 14456 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 8 ms 14420 KB Output is correct
16 Correct 11 ms 14432 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 7 ms 14480 KB Output is correct
19 Correct 7 ms 14420 KB Output is correct
20 Correct 7 ms 14420 KB Output is correct
21 Correct 9 ms 14768 KB Output is correct
22 Correct 9 ms 14804 KB Output is correct
23 Correct 8 ms 14800 KB Output is correct
24 Correct 9 ms 14804 KB Output is correct
25 Correct 11 ms 14744 KB Output is correct
26 Correct 9 ms 14804 KB Output is correct
27 Correct 8 ms 14676 KB Output is correct
28 Correct 9 ms 14804 KB Output is correct
29 Correct 10 ms 14804 KB Output is correct
30 Correct 9 ms 14796 KB Output is correct
31 Correct 9 ms 14796 KB Output is correct
32 Correct 9 ms 14760 KB Output is correct
33 Correct 9 ms 14804 KB Output is correct
34 Correct 9 ms 14676 KB Output is correct
35 Correct 9 ms 14664 KB Output is correct
36 Correct 9 ms 14764 KB Output is correct
37 Correct 9 ms 14676 KB Output is correct
38 Correct 9 ms 14664 KB Output is correct
39 Correct 215 ms 43688 KB Output is correct
40 Correct 233 ms 44824 KB Output is correct
41 Correct 248 ms 44892 KB Output is correct
42 Correct 370 ms 45136 KB Output is correct
43 Correct 346 ms 58384 KB Output is correct
44 Correct 326 ms 51376 KB Output is correct
45 Correct 236 ms 44348 KB Output is correct
46 Correct 121 ms 52472 KB Output is correct
47 Correct 480 ms 66776 KB Output is correct
48 Correct 623 ms 103496 KB Output is correct
49 Correct 623 ms 101652 KB Output is correct
50 Correct 453 ms 66688 KB Output is correct
51 Correct 466 ms 66724 KB Output is correct
52 Correct 803 ms 66700 KB Output is correct
53 Correct 655 ms 66276 KB Output is correct
54 Correct 682 ms 98860 KB Output is correct
55 Correct 28 ms 18468 KB Output is correct
56 Correct 20 ms 17100 KB Output is correct
57 Correct 133 ms 43516 KB Output is correct
58 Correct 129 ms 40056 KB Output is correct
59 Correct 127 ms 58812 KB Output is correct
60 Correct 646 ms 102088 KB Output is correct
61 Correct 490 ms 70220 KB Output is correct
62 Correct 439 ms 66608 KB Output is correct
63 Correct 730 ms 66928 KB Output is correct
64 Correct 938 ms 117172 KB Output is correct
65 Correct 960 ms 117732 KB Output is correct
66 Correct 693 ms 97580 KB Output is correct
67 Correct 570 ms 67244 KB Output is correct
68 Correct 743 ms 85020 KB Output is correct
69 Correct 775 ms 85984 KB Output is correct
70 Correct 731 ms 81948 KB Output is correct