oj.uz

답안 #896711

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
896711 2024-01-01T23:06:42 Z ShaShi 경주 (Race) (IOI11_race) C++17
100 / 100
 309 ms 73044 KB 
#include "race.h"
#include <bits/stdc++.h>
// #define int long long 
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define kill(x) cout << x << endl, exit(0);
#define mp make_pair
#define pii pair<ll, ll>
#define pb push_back


using namespace std;
typedef long long ll;

const int MAXN = (int)1e6 + 7;
const int MOD = 998244353;
const int INF = (int)1e9 + 7;

ll n, m, t, u, v, w, tmp, tmp2, tmp3, tmp4, ans, k;
ll arr[MAXN], cost[MAXN], sz[MAXN];
pii love[MAXN];
bool hate[MAXN];
vector<pii> adj[MAXN];


void DFSsz(int v, int p=-1) {
	sz[v] = 1;

	for (auto cur:adj[v]) {
		int u = cur.F, w = cur.S;

		if (!hate[u] && u != p) {
			DFSsz(u, v);
			sz[v] += sz[u];
		}
	}
}


int centroid(int tot, int v, int p=-1) {
	for (auto cur:adj[v]) {
		int u = cur.F, w = cur.S;

		if (u != p && !hate[u] && 2*sz[u] > tot) return centroid(tot, u, v);
	}

	return v;
}


void check_mol(int v, int cent, int p, pii dis, bool x) {
	if (dis.S > k) return;

	for (auto cur:adj[v]) {
		int u = cur.F, w = cur.S;

		if (u != p && !hate[u]) check_mol(u, cent, v, mp(dis.F+1, dis.S+w), x);
	}

	if (!x) {
		if (love[k-dis.S].F == cent) {
			ans = min(ans, dis.F+love[k-dis.S].S);
		}
	} else {
		if (love[dis.S].F != cent) {
			love[dis.S].F = cent;
			love[dis.S].S = dis.F;
		} else {
			love[dis.S].S = min(love[dis.S].S, dis.F);
		}
	}
}


void solve(int v) {
	DFSsz(v);
	int cent = centroid(sz[v], v);


	for (auto cur:adj[cent]) {
		int u = cur.F, w = cur.S;
		if (hate[u]) continue;

		check_mol(u, cent, cent, mp(1, w), 0);
		check_mol(u, cent, cent, mp(1, w), 1);
	}

	if (love[k].F == cent) ans = min(ans, love[k].S);

	hate[cent] = 1;
	for (auto cur:adj[cent]) if (!hate[cur.F]) solve(cur.F);
}


int best_path(int N, int K, int H[][2], int L[]) {
	n = N, k=K;

	for (int i=0; i<n-1; i++) {
		u = H[i][0];
		v = H[i][1];
		w = L[i];
		u++, v++;

		adj[u].pb(mp(v, w));
		adj[v].pb(mp(u, w));
	}

	ans = INF;

	solve(1);

	if (ans == INF) return -1;
	return ans;
}

Compilation message

race.cpp: In function 'void DFSsz(int, int)':
race.cpp:31:18: warning: unused variable 'w' [-Wunused-variable]
   31 |   int u = cur.F, w = cur.S;
      |                  ^
race.cpp: In function 'int centroid(int, int, int)':
race.cpp:43:18: warning: unused variable 'w' [-Wunused-variable]
   43 |   int u = cur.F, w = cur.S;
      |                  ^

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 31068 KB Output is correct
2 Correct 6 ms 31064 KB Output is correct
3 Correct 6 ms 31068 KB Output is correct
4 Correct 7 ms 31068 KB Output is correct
5 Correct 6 ms 31068 KB Output is correct
6 Correct 6 ms 31068 KB Output is correct
7 Correct 6 ms 31068 KB Output is correct
8 Correct 7 ms 31064 KB Output is correct
9 Correct 7 ms 31324 KB Output is correct
10 Correct 6 ms 31216 KB Output is correct
11 Correct 6 ms 31068 KB Output is correct
12 Correct 7 ms 31068 KB Output is correct
13 Correct 6 ms 31172 KB Output is correct
14 Correct 6 ms 31068 KB Output is correct
15 Correct 6 ms 31184 KB Output is correct
16 Correct 6 ms 31068 KB Output is correct
17 Correct 6 ms 31064 KB Output is correct
18 Correct 6 ms 31068 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 31068 KB Output is correct
2 Correct 6 ms 31064 KB Output is correct
3 Correct 6 ms 31068 KB Output is correct
4 Correct 7 ms 31068 KB Output is correct
5 Correct 6 ms 31068 KB Output is correct
6 Correct 6 ms 31068 KB Output is correct
7 Correct 6 ms 31068 KB Output is correct
8 Correct 7 ms 31064 KB Output is correct
9 Correct 7 ms 31324 KB Output is correct
10 Correct 6 ms 31216 KB Output is correct
11 Correct 6 ms 31068 KB Output is correct
12 Correct 7 ms 31068 KB Output is correct
13 Correct 6 ms 31172 KB Output is correct
14 Correct 6 ms 31068 KB Output is correct
15 Correct 6 ms 31184 KB Output is correct
16 Correct 6 ms 31068 KB Output is correct
17 Correct 6 ms 31064 KB Output is correct
18 Correct 6 ms 31068 KB Output is correct
19 Correct 6 ms 31068 KB Output is correct
20 Correct 7 ms 31068 KB Output is correct
21 Correct 8 ms 31220 KB Output is correct
22 Correct 9 ms 35204 KB Output is correct
23 Correct 8 ms 34396 KB Output is correct
24 Correct 9 ms 36152 KB Output is correct
25 Correct 9 ms 35928 KB Output is correct
26 Correct 8 ms 34500 KB Output is correct
27 Correct 6 ms 31304 KB Output is correct
28 Correct 7 ms 33628 KB Output is correct
29 Correct 8 ms 34908 KB Output is correct
30 Correct 9 ms 35420 KB Output is correct
31 Correct 9 ms 36188 KB Output is correct
32 Correct 9 ms 36324 KB Output is correct
33 Correct 11 ms 38632 KB Output is correct
34 Correct 9 ms 37064 KB Output is correct
35 Correct 10 ms 37980 KB Output is correct
36 Correct 10 ms 38564 KB Output is correct
37 Correct 9 ms 36084 KB Output is correct
38 Correct 8 ms 34396 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 31068 KB Output is correct
2 Correct 6 ms 31064 KB Output is correct
3 Correct 6 ms 31068 KB Output is correct
4 Correct 7 ms 31068 KB Output is correct
5 Correct 6 ms 31068 KB Output is correct
6 Correct 6 ms 31068 KB Output is correct
7 Correct 6 ms 31068 KB Output is correct
8 Correct 7 ms 31064 KB Output is correct
9 Correct 7 ms 31324 KB Output is correct
10 Correct 6 ms 31216 KB Output is correct
11 Correct 6 ms 31068 KB Output is correct
12 Correct 7 ms 31068 KB Output is correct
13 Correct 6 ms 31172 KB Output is correct
14 Correct 6 ms 31068 KB Output is correct
15 Correct 6 ms 31184 KB Output is correct
16 Correct 6 ms 31068 KB Output is correct
17 Correct 6 ms 31064 KB Output is correct
18 Correct 6 ms 31068 KB Output is correct
19 Correct 90 ms 39508 KB Output is correct
20 Correct 83 ms 39540 KB Output is correct
21 Correct 100 ms 39552 KB Output is correct
22 Correct 83 ms 39504 KB Output is correct
23 Correct 54 ms 39760 KB Output is correct
24 Correct 44 ms 39144 KB Output is correct
25 Correct 87 ms 43088 KB Output is correct
26 Correct 77 ms 46828 KB Output is correct
27 Correct 115 ms 47952 KB Output is correct
28 Correct 167 ms 62092 KB Output is correct
29 Correct 166 ms 61008 KB Output is correct
30 Correct 113 ms 47888 KB Output is correct
31 Correct 118 ms 47856 KB Output is correct
32 Correct 125 ms 47956 KB Output is correct
33 Correct 135 ms 46676 KB Output is correct
34 Correct 121 ms 46848 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 31068 KB Output is correct
2 Correct 6 ms 31064 KB Output is correct
3 Correct 6 ms 31068 KB Output is correct
4 Correct 7 ms 31068 KB Output is correct
5 Correct 6 ms 31068 KB Output is correct
6 Correct 6 ms 31068 KB Output is correct
7 Correct 6 ms 31068 KB Output is correct
8 Correct 7 ms 31064 KB Output is correct
9 Correct 7 ms 31324 KB Output is correct
10 Correct 6 ms 31216 KB Output is correct
11 Correct 6 ms 31068 KB Output is correct
12 Correct 7 ms 31068 KB Output is correct
13 Correct 6 ms 31172 KB Output is correct
14 Correct 6 ms 31068 KB Output is correct
15 Correct 6 ms 31184 KB Output is correct
16 Correct 6 ms 31068 KB Output is correct
17 Correct 6 ms 31064 KB Output is correct
18 Correct 6 ms 31068 KB Output is correct
19 Correct 6 ms 31068 KB Output is correct
20 Correct 7 ms 31068 KB Output is correct
21 Correct 8 ms 31220 KB Output is correct
22 Correct 9 ms 35204 KB Output is correct
23 Correct 8 ms 34396 KB Output is correct
24 Correct 9 ms 36152 KB Output is correct
25 Correct 9 ms 35928 KB Output is correct
26 Correct 8 ms 34500 KB Output is correct
27 Correct 6 ms 31304 KB Output is correct
28 Correct 7 ms 33628 KB Output is correct
29 Correct 8 ms 34908 KB Output is correct
30 Correct 9 ms 35420 KB Output is correct
31 Correct 9 ms 36188 KB Output is correct
32 Correct 9 ms 36324 KB Output is correct
33 Correct 11 ms 38632 KB Output is correct
34 Correct 9 ms 37064 KB Output is correct
35 Correct 10 ms 37980 KB Output is correct
36 Correct 10 ms 38564 KB Output is correct
37 Correct 9 ms 36084 KB Output is correct
38 Correct 8 ms 34396 KB Output is correct
39 Correct 90 ms 39508 KB Output is correct
40 Correct 83 ms 39540 KB Output is correct
41 Correct 100 ms 39552 KB Output is correct
42 Correct 83 ms 39504 KB Output is correct
43 Correct 54 ms 39760 KB Output is correct
44 Correct 44 ms 39144 KB Output is correct
45 Correct 87 ms 43088 KB Output is correct
46 Correct 77 ms 46828 KB Output is correct
47 Correct 115 ms 47952 KB Output is correct
48 Correct 167 ms 62092 KB Output is correct
49 Correct 166 ms 61008 KB Output is correct
50 Correct 113 ms 47888 KB Output is correct
51 Correct 118 ms 47856 KB Output is correct
52 Correct 125 ms 47956 KB Output is correct
53 Correct 135 ms 46676 KB Output is correct
54 Correct 121 ms 46848 KB Output is correct
55 Correct 12 ms 31904 KB Output is correct
56 Correct 12 ms 31892 KB Output is correct
57 Correct 59 ms 39920 KB Output is correct
58 Correct 32 ms 38860 KB Output is correct
59 Correct 79 ms 47916 KB Output is correct
60 Correct 309 ms 70712 KB Output is correct
61 Correct 125 ms 48012 KB Output is correct
62 Correct 131 ms 47956 KB Output is correct
63 Correct 164 ms 48100 KB Output is correct
64 Correct 294 ms 51088 KB Output is correct
65 Correct 126 ms 47912 KB Output is correct
66 Correct 280 ms 73044 KB Output is correct
67 Correct 74 ms 47296 KB Output is correct
68 Correct 195 ms 57156 KB Output is correct
69 Correct 173 ms 57424 KB Output is correct
70 Correct 166 ms 56460 KB Output is correct