oj.uz

답안 #680961

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
680961 2023-01-12T06:49:05 Z nicky4321 경주 (Race) (IOI11_race) C++14
100 / 100
 988 ms 62020 KB 
#include <iostream>
#include <cstring>
#include <string>
#include <map>
#include <cmath>
#include <vector>
#include <set>
#include <algorithm>
#include <queue>
#include <bitset>
#include <deque>
#include <stack>
#include <array>
#include <cassert>
#define ll long long
#define ld long double
#define F first
#define S second
#define PB push_back
#define MK make_pair
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pdd pair<double, double>
#define ALL(x) x.begin(), x.end()
#define vi vector<int>
#define vl vector<ll>
#define SZ(x) (int)x.size()
#define CASE int t;cin>>t;for(int ca=1;ca<=t;ca++)
#define IOS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
using namespace std;
const int MAX = 1 << 20, MOD = 1e9 + 7;
vector<pii> edge[MAX];
int cnt[MAX], vis[MAX], w[MAX];
int n, k, half;
int ans = 2e9;
map<ll, int> dis;
 
void dfs(int now, int from){
	cnt[now] = 1;
	for(pii y : edge[now]){
        int i = y.F;
		if(i == from || vis[i])
			continue;
		dfs(i, now);
		cnt[now] += cnt[i];
	}
}
 
int find(int now, int from){
	for(pii y : edge[now]){
        int i = y.F;
		if(i == from || vis[i])
			continue;
		if(cnt[i] > half)
			return find(i, now);
	}
	return now;
}
 
void calc1(int now, int from, int d, ll val){
    if(val > k)
        return;
    if(dis.count(k - val)){
        ans = min(ans, d + dis[k - val]);
    }
	for(pii y: edge[now]){
        int i = y.F;
		if(vis[i] || i == from)
			continue;
		calc1(i, now, d + 1, val + y.S);
	}
}
 
void calc2(int now, int from, int d, ll val){
    if(val > k){
        return;
    }
    if(dis.count(val) != 0){
        dis[val] = min(dis[val], d);
    }else{
        dis[val] = d;
    }
	for(pii y : edge[now]){
        int i = y.F;
		if(vis[i] || i == from)
			continue;
		calc2(i, now, d + 1, val + y.S);
	}
}
 
void solve(int x){
	dfs(x, x);
	half = cnt[x] / 2;
	int c = find(x, x);
	vis[c] = 1;
	dis[0] = 0;
	for(pii i : edge[c]){
        int y = i.F;
		if(!vis[y]){
			calc1(y, y, 1, i.S);
			calc2(y, y, 1, i.S);
		}
	}
    dis.clear();
	for(pii i : edge[c]){
		if(!vis[i.F])
			solve(i.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++){
        edge[H[i][0]].PB(MK(H[i][1], L[i]));
        edge[H[i][1]].PB(MK(H[i][0], L[i]));
    }
    solve(0);
    return (ans == 2e9 ? -1 : ans);
}

// int main(){
//     IOS
//     int N, K;
//     cin >> N >> K;
//     int H[N - 1][2], L[N - 1];
//     for(int i = 0;i < N - 1;i++){
//         cin >> H[i][0] >> H[i][1];
//     }
//     for(int i = 0;i < N - 1;i++)
//         cin >> L[i];
//     cout << best_path(N, K, H, L) << '\n';
//     return 0;
// }

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 24916 KB Output is correct
2 Correct 16 ms 24944 KB Output is correct
3 Correct 14 ms 24860 KB Output is correct
4 Correct 13 ms 24940 KB Output is correct
5 Correct 14 ms 24916 KB Output is correct
6 Correct 14 ms 24976 KB Output is correct
7 Correct 13 ms 24916 KB Output is correct
8 Correct 14 ms 24944 KB Output is correct
9 Correct 14 ms 24936 KB Output is correct
10 Correct 14 ms 24936 KB Output is correct
11 Correct 13 ms 24936 KB Output is correct
12 Correct 13 ms 24940 KB Output is correct
13 Correct 14 ms 24916 KB Output is correct
14 Correct 14 ms 24936 KB Output is correct
15 Correct 13 ms 24920 KB Output is correct
16 Correct 17 ms 24916 KB Output is correct
17 Correct 17 ms 24972 KB Output is correct
18 Correct 17 ms 24936 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 24916 KB Output is correct
2 Correct 16 ms 24944 KB Output is correct
3 Correct 14 ms 24860 KB Output is correct
4 Correct 13 ms 24940 KB Output is correct
5 Correct 14 ms 24916 KB Output is correct
6 Correct 14 ms 24976 KB Output is correct
7 Correct 13 ms 24916 KB Output is correct
8 Correct 14 ms 24944 KB Output is correct
9 Correct 14 ms 24936 KB Output is correct
10 Correct 14 ms 24936 KB Output is correct
11 Correct 13 ms 24936 KB Output is correct
12 Correct 13 ms 24940 KB Output is correct
13 Correct 14 ms 24916 KB Output is correct
14 Correct 14 ms 24936 KB Output is correct
15 Correct 13 ms 24920 KB Output is correct
16 Correct 17 ms 24916 KB Output is correct
17 Correct 17 ms 24972 KB Output is correct
18 Correct 17 ms 24936 KB Output is correct
19 Correct 13 ms 24916 KB Output is correct
20 Correct 13 ms 24940 KB Output is correct
21 Correct 14 ms 24956 KB Output is correct
22 Correct 14 ms 24916 KB Output is correct
23 Correct 14 ms 24956 KB Output is correct
24 Correct 14 ms 24948 KB Output is correct
25 Correct 14 ms 25044 KB Output is correct
26 Correct 15 ms 24916 KB Output is correct
27 Correct 14 ms 24916 KB Output is correct
28 Correct 16 ms 24952 KB Output is correct
29 Correct 14 ms 25044 KB Output is correct
30 Correct 15 ms 25080 KB Output is correct
31 Correct 14 ms 25060 KB Output is correct
32 Correct 15 ms 25044 KB Output is correct
33 Correct 15 ms 24988 KB Output is correct
34 Correct 14 ms 25032 KB Output is correct
35 Correct 15 ms 25044 KB Output is correct
36 Correct 15 ms 25044 KB Output is correct
37 Correct 19 ms 25172 KB Output is correct
38 Correct 15 ms 25048 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 24916 KB Output is correct
2 Correct 16 ms 24944 KB Output is correct
3 Correct 14 ms 24860 KB Output is correct
4 Correct 13 ms 24940 KB Output is correct
5 Correct 14 ms 24916 KB Output is correct
6 Correct 14 ms 24976 KB Output is correct
7 Correct 13 ms 24916 KB Output is correct
8 Correct 14 ms 24944 KB Output is correct
9 Correct 14 ms 24936 KB Output is correct
10 Correct 14 ms 24936 KB Output is correct
11 Correct 13 ms 24936 KB Output is correct
12 Correct 13 ms 24940 KB Output is correct
13 Correct 14 ms 24916 KB Output is correct
14 Correct 14 ms 24936 KB Output is correct
15 Correct 13 ms 24920 KB Output is correct
16 Correct 17 ms 24916 KB Output is correct
17 Correct 17 ms 24972 KB Output is correct
18 Correct 17 ms 24936 KB Output is correct
19 Correct 199 ms 31088 KB Output is correct
20 Correct 234 ms 31092 KB Output is correct
21 Correct 246 ms 31148 KB Output is correct
22 Correct 230 ms 31152 KB Output is correct
23 Correct 108 ms 31420 KB Output is correct
24 Correct 89 ms 31220 KB Output is correct
25 Correct 180 ms 34668 KB Output is correct
26 Correct 120 ms 38360 KB Output is correct
27 Correct 207 ms 36888 KB Output is correct
28 Correct 310 ms 51156 KB Output is correct
29 Correct 280 ms 50244 KB Output is correct
30 Correct 254 ms 36908 KB Output is correct
31 Correct 235 ms 37068 KB Output is correct
32 Correct 245 ms 37068 KB Output is correct
33 Correct 297 ms 35764 KB Output is correct
34 Correct 199 ms 35792 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 24916 KB Output is correct
2 Correct 16 ms 24944 KB Output is correct
3 Correct 14 ms 24860 KB Output is correct
4 Correct 13 ms 24940 KB Output is correct
5 Correct 14 ms 24916 KB Output is correct
6 Correct 14 ms 24976 KB Output is correct
7 Correct 13 ms 24916 KB Output is correct
8 Correct 14 ms 24944 KB Output is correct
9 Correct 14 ms 24936 KB Output is correct
10 Correct 14 ms 24936 KB Output is correct
11 Correct 13 ms 24936 KB Output is correct
12 Correct 13 ms 24940 KB Output is correct
13 Correct 14 ms 24916 KB Output is correct
14 Correct 14 ms 24936 KB Output is correct
15 Correct 13 ms 24920 KB Output is correct
16 Correct 17 ms 24916 KB Output is correct
17 Correct 17 ms 24972 KB Output is correct
18 Correct 17 ms 24936 KB Output is correct
19 Correct 13 ms 24916 KB Output is correct
20 Correct 13 ms 24940 KB Output is correct
21 Correct 14 ms 24956 KB Output is correct
22 Correct 14 ms 24916 KB Output is correct
23 Correct 14 ms 24956 KB Output is correct
24 Correct 14 ms 24948 KB Output is correct
25 Correct 14 ms 25044 KB Output is correct
26 Correct 15 ms 24916 KB Output is correct
27 Correct 14 ms 24916 KB Output is correct
28 Correct 16 ms 24952 KB Output is correct
29 Correct 14 ms 25044 KB Output is correct
30 Correct 15 ms 25080 KB Output is correct
31 Correct 14 ms 25060 KB Output is correct
32 Correct 15 ms 25044 KB Output is correct
33 Correct 15 ms 24988 KB Output is correct
34 Correct 14 ms 25032 KB Output is correct
35 Correct 15 ms 25044 KB Output is correct
36 Correct 15 ms 25044 KB Output is correct
37 Correct 19 ms 25172 KB Output is correct
38 Correct 15 ms 25048 KB Output is correct
39 Correct 199 ms 31088 KB Output is correct
40 Correct 234 ms 31092 KB Output is correct
41 Correct 246 ms 31148 KB Output is correct
42 Correct 230 ms 31152 KB Output is correct
43 Correct 108 ms 31420 KB Output is correct
44 Correct 89 ms 31220 KB Output is correct
45 Correct 180 ms 34668 KB Output is correct
46 Correct 120 ms 38360 KB Output is correct
47 Correct 207 ms 36888 KB Output is correct
48 Correct 310 ms 51156 KB Output is correct
49 Correct 280 ms 50244 KB Output is correct
50 Correct 254 ms 36908 KB Output is correct
51 Correct 235 ms 37068 KB Output is correct
52 Correct 245 ms 37068 KB Output is correct
53 Correct 297 ms 35764 KB Output is correct
54 Correct 199 ms 35792 KB Output is correct
55 Correct 33 ms 25792 KB Output is correct
56 Correct 26 ms 25560 KB Output is correct
57 Correct 150 ms 31244 KB Output is correct
58 Correct 58 ms 31296 KB Output is correct
59 Correct 299 ms 43052 KB Output is correct
60 Correct 874 ms 62020 KB Output is correct
61 Correct 303 ms 37312 KB Output is correct
62 Correct 290 ms 37096 KB Output is correct
63 Correct 366 ms 37168 KB Output is correct
64 Correct 988 ms 42876 KB Output is correct
65 Correct 242 ms 36988 KB Output is correct
66 Correct 602 ms 47740 KB Output is correct
67 Correct 140 ms 37304 KB Output is correct
68 Correct 415 ms 41852 KB Output is correct
69 Correct 449 ms 41792 KB Output is correct
70 Correct 382 ms 41260 KB Output is correct