oj.uz

답안 #429472

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
429472 2021-06-16T01:05:03 Z hibye1217 경주 (Race) (IOI11_race) C++17
100 / 100
 676 ms 38040 KB 
#ifndef NOTSUBMIT
#include "race.h"
#include <bits/stdc++.h>
using namespace std;
#endif // NOTSUBMIT

typedef long long ll;
typedef pair<ll, ll> pl2;
typedef pair<int, int> pi2;
#define fr first
#define sc second

vector<pl2> adj[200020];
bool chk[200020];
int sz[200020];

int siz(int now, int par){
	//cout << "  SIZ " << now << ' ' << par << endl;
	sz[now] = 1;
	for (pl2 p : adj[now]){
		//cout << "  P " << p.fr << ' ' << p.sc << endl;
		int nxt = p.fr;
		if (nxt == par || chk[nxt]){ continue; }
		//cout << "  ?? " << nxt << ' ' << now << endl;
		sz[now] += siz(nxt, now);
	}
	//cout << "    SIZE " << now << ' ' << sz[now] << endl;
	return sz[now];
}

int cen(int now){
	siz(now, -1);
	int ptr = now, tar = sz[now] / 2;
	int par = -1;
	while (1){
		bool flg = 1;
		for (pl2 p : adj[ptr]){
			int nxt = p.fr;
			if (par == nxt || chk[nxt] || sz[nxt] <= tar){ continue; }
			flg = 0; par = ptr; ptr = nxt; break;
		}
		if (flg){ return ptr; }
	}
}

int k;
vector<pi2> v;
int dp[1000020];
queue<int> q;


void dpf(int now, int par, int dep, ll dis){
	if (dis > k){ return; }
	v.push_back({dep, dis});
	for (pl2 p : adj[now]){
		int nxt = p.fr; ll dst = p.sc;
		if (par == nxt || chk[nxt]){ continue; }
		dpf(nxt, now, dep+1, dis+dst);
	}
}

int ans = 1e9;
void f(int now){
	int r = cen(now);
	//cout << "CEN " << now << ' ' << r << endl;
	for (pl2 p : adj[r]){
		int nxt = p.fr; ll dis = p.sc;
		if (chk[nxt]){ continue; }
		dpf(nxt, r, 1, dis);
		for (pi2 pp : v){
			int dep = pp.fr, dst = pp.sc;
			q.push(dst);
			//cout << "ANS " << dep << ' ' << dst << ' ';
			if (dp[k-dst] != -1){ ans = min(ans, dp[k-dst] + dep); }
			//cout << ans << endl;
		}
		for (pi2 pp : v){
			int dep = pp.fr, dst = pp.sc;
			//cout << "DP " << dst << ' ' << dp[dst] << ' ' << dep << endl;
			if (dp[dst] == -1){ dp[dst] = dep; }
			else{ dp[dst] = min(dp[dst], dep); }
		}
		v.clear();
	}
	while (!q.empty()){ dp[q.front()] = -1; q.pop(); }
	chk[r] = 1;
	for (pl2 p : adj[r]){
		int nxt = p.fr;
		if (chk[nxt]){ continue; }
		f(nxt);
	}
}

int best_path(int N, int K, int H[][2], int L[]){
	for (int i = 0; i < N-1; i++){
		adj[ H[i][0] ].push_back({ H[i][1], L[i] });
		adj[ H[i][1] ].push_back({ H[i][0], L[i] });
	}
	k = K; memset(dp, -1, sizeof(dp)); dp[0] = 0;
	f(0);
	if (ans == 1e9){ return -1; }
	else{ return ans; }
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 6 ms 8908 KB Output is correct
3 Correct 6 ms 8908 KB Output is correct
4 Correct 6 ms 8868 KB Output is correct
5 Correct 6 ms 8908 KB Output is correct
6 Correct 6 ms 8908 KB Output is correct
7 Correct 6 ms 8908 KB Output is correct
8 Correct 6 ms 8908 KB Output is correct
9 Correct 6 ms 8908 KB Output is correct
10 Correct 6 ms 8848 KB Output is correct
11 Correct 6 ms 8908 KB Output is correct
12 Correct 6 ms 8908 KB Output is correct
13 Correct 7 ms 8908 KB Output is correct
14 Correct 6 ms 8908 KB Output is correct
15 Correct 6 ms 8908 KB Output is correct
16 Correct 6 ms 8908 KB Output is correct
17 Correct 6 ms 8880 KB Output is correct
18 Correct 6 ms 8908 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 6 ms 8908 KB Output is correct
3 Correct 6 ms 8908 KB Output is correct
4 Correct 6 ms 8868 KB Output is correct
5 Correct 6 ms 8908 KB Output is correct
6 Correct 6 ms 8908 KB Output is correct
7 Correct 6 ms 8908 KB Output is correct
8 Correct 6 ms 8908 KB Output is correct
9 Correct 6 ms 8908 KB Output is correct
10 Correct 6 ms 8848 KB Output is correct
11 Correct 6 ms 8908 KB Output is correct
12 Correct 6 ms 8908 KB Output is correct
13 Correct 7 ms 8908 KB Output is correct
14 Correct 6 ms 8908 KB Output is correct
15 Correct 6 ms 8908 KB Output is correct
16 Correct 6 ms 8908 KB Output is correct
17 Correct 6 ms 8880 KB Output is correct
18 Correct 6 ms 8908 KB Output is correct
19 Correct 6 ms 8908 KB Output is correct
20 Correct 6 ms 8904 KB Output is correct
21 Correct 7 ms 8908 KB Output is correct
22 Correct 7 ms 8908 KB Output is correct
23 Correct 6 ms 8908 KB Output is correct
24 Correct 7 ms 8908 KB Output is correct
25 Correct 7 ms 8908 KB Output is correct
26 Correct 7 ms 8908 KB Output is correct
27 Correct 7 ms 8968 KB Output is correct
28 Correct 7 ms 8908 KB Output is correct
29 Correct 7 ms 8908 KB Output is correct
30 Correct 6 ms 8908 KB Output is correct
31 Correct 6 ms 8908 KB Output is correct
32 Correct 7 ms 8908 KB Output is correct
33 Correct 7 ms 8920 KB Output is correct
34 Correct 7 ms 8912 KB Output is correct
35 Correct 8 ms 8908 KB Output is correct
36 Correct 7 ms 8908 KB Output is correct
37 Correct 7 ms 8908 KB Output is correct
38 Correct 7 ms 8908 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 6 ms 8908 KB Output is correct
3 Correct 6 ms 8908 KB Output is correct
4 Correct 6 ms 8868 KB Output is correct
5 Correct 6 ms 8908 KB Output is correct
6 Correct 6 ms 8908 KB Output is correct
7 Correct 6 ms 8908 KB Output is correct
8 Correct 6 ms 8908 KB Output is correct
9 Correct 6 ms 8908 KB Output is correct
10 Correct 6 ms 8848 KB Output is correct
11 Correct 6 ms 8908 KB Output is correct
12 Correct 6 ms 8908 KB Output is correct
13 Correct 7 ms 8908 KB Output is correct
14 Correct 6 ms 8908 KB Output is correct
15 Correct 6 ms 8908 KB Output is correct
16 Correct 6 ms 8908 KB Output is correct
17 Correct 6 ms 8880 KB Output is correct
18 Correct 6 ms 8908 KB Output is correct
19 Correct 161 ms 15788 KB Output is correct
20 Correct 179 ms 15908 KB Output is correct
21 Correct 175 ms 16084 KB Output is correct
22 Correct 158 ms 16328 KB Output is correct
23 Correct 102 ms 16048 KB Output is correct
24 Correct 72 ms 15216 KB Output is correct
25 Correct 146 ms 18628 KB Output is correct
26 Correct 115 ms 22336 KB Output is correct
27 Correct 220 ms 22976 KB Output is correct
28 Correct 381 ms 34116 KB Output is correct
29 Correct 327 ms 33076 KB Output is correct
30 Correct 252 ms 22996 KB Output is correct
31 Correct 227 ms 23012 KB Output is correct
32 Correct 279 ms 23012 KB Output is correct
33 Correct 287 ms 21756 KB Output is correct
34 Correct 245 ms 21704 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 6 ms 8908 KB Output is correct
3 Correct 6 ms 8908 KB Output is correct
4 Correct 6 ms 8868 KB Output is correct
5 Correct 6 ms 8908 KB Output is correct
6 Correct 6 ms 8908 KB Output is correct
7 Correct 6 ms 8908 KB Output is correct
8 Correct 6 ms 8908 KB Output is correct
9 Correct 6 ms 8908 KB Output is correct
10 Correct 6 ms 8848 KB Output is correct
11 Correct 6 ms 8908 KB Output is correct
12 Correct 6 ms 8908 KB Output is correct
13 Correct 7 ms 8908 KB Output is correct
14 Correct 6 ms 8908 KB Output is correct
15 Correct 6 ms 8908 KB Output is correct
16 Correct 6 ms 8908 KB Output is correct
17 Correct 6 ms 8880 KB Output is correct
18 Correct 6 ms 8908 KB Output is correct
19 Correct 6 ms 8908 KB Output is correct
20 Correct 6 ms 8904 KB Output is correct
21 Correct 7 ms 8908 KB Output is correct
22 Correct 7 ms 8908 KB Output is correct
23 Correct 6 ms 8908 KB Output is correct
24 Correct 7 ms 8908 KB Output is correct
25 Correct 7 ms 8908 KB Output is correct
26 Correct 7 ms 8908 KB Output is correct
27 Correct 7 ms 8968 KB Output is correct
28 Correct 7 ms 8908 KB Output is correct
29 Correct 7 ms 8908 KB Output is correct
30 Correct 6 ms 8908 KB Output is correct
31 Correct 6 ms 8908 KB Output is correct
32 Correct 7 ms 8908 KB Output is correct
33 Correct 7 ms 8920 KB Output is correct
34 Correct 7 ms 8912 KB Output is correct
35 Correct 8 ms 8908 KB Output is correct
36 Correct 7 ms 8908 KB Output is correct
37 Correct 7 ms 8908 KB Output is correct
38 Correct 7 ms 8908 KB Output is correct
39 Correct 161 ms 15788 KB Output is correct
40 Correct 179 ms 15908 KB Output is correct
41 Correct 175 ms 16084 KB Output is correct
42 Correct 158 ms 16328 KB Output is correct
43 Correct 102 ms 16048 KB Output is correct
44 Correct 72 ms 15216 KB Output is correct
45 Correct 146 ms 18628 KB Output is correct
46 Correct 115 ms 22336 KB Output is correct
47 Correct 220 ms 22976 KB Output is correct
48 Correct 381 ms 34116 KB Output is correct
49 Correct 327 ms 33076 KB Output is correct
50 Correct 252 ms 22996 KB Output is correct
51 Correct 227 ms 23012 KB Output is correct
52 Correct 279 ms 23012 KB Output is correct
53 Correct 287 ms 21756 KB Output is correct
54 Correct 245 ms 21704 KB Output is correct
55 Correct 20 ms 9548 KB Output is correct
56 Correct 16 ms 9676 KB Output is correct
57 Correct 102 ms 16700 KB Output is correct
58 Correct 47 ms 15604 KB Output is correct
59 Correct 117 ms 23704 KB Output is correct
60 Correct 598 ms 38040 KB Output is correct
61 Correct 236 ms 26200 KB Output is correct
62 Correct 276 ms 26700 KB Output is correct
63 Correct 337 ms 26796 KB Output is correct
64 Correct 676 ms 27440 KB Output is correct
65 Correct 326 ms 26356 KB Output is correct
66 Correct 478 ms 34420 KB Output is correct
67 Correct 184 ms 25768 KB Output is correct
68 Correct 330 ms 26364 KB Output is correct
69 Correct 336 ms 26528 KB Output is correct
70 Correct 343 ms 25604 KB Output is correct