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답안 #994458

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
994458 2024-06-07T16:38:05 Z pannenkoek 경주 (Race) (IOI11_race) C++17
100 / 100
 356 ms 110780 KB 
#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define pb push_back
#define fi first
#define se second

using ll = long long;
using ld = long double;
using pii = pair<ll, ll>;

const int MAXN = 2e5 + 5;
vector<pii> adj[MAXN];
map<ll, ll> poss[MAXN]; 
ll off[MAXN], cost_off[MAXN];
ll res = 1e18;
int k;

void dfs(ll v, ll p){
    poss[v][0] = 0;
    for(auto [u, d]: adj[v]){
        if(u == p) continue;
        dfs(u, v);
        off[u] += d;
        cost_off[u]++;
        if(poss[u].size() > poss[v].size()) {
            swap(off[u], off[v]);
            swap(cost_off[u], cost_off[v]);
            swap(poss[u], poss[v]);
        }
        set<ll> new_entries;
        map<ll, ll> old_vals;
        for(auto [dis, cost]: poss[u]){
            ll real_dis = dis + off[u];
            if(real_dis > k) continue;
            ll miss = k - real_dis - off[v];
            if(poss[v].count(miss) && !new_entries.count(miss)){
                ll old_cost = poss[v][miss];
                if(old_vals.count(miss)) {
                    old_cost = old_vals[miss]; 
                }
                res = min(old_cost + cost_off[u] + cost_off[v] + cost, res);
            }
            real_dis -= off[v];
            if(poss[v].count(real_dis)) {
                old_vals[real_dis] = poss[v][real_dis];
                poss[v][real_dis] = min(poss[v][real_dis], cost + cost_off[u] - cost_off[v]);
            } else {
                poss[v][real_dis] = cost + cost_off[u] - cost_off[v];
                new_entries.insert(real_dis);
            }
        }
        poss[u] = {};
    }
}

int best_path(int N, int K, int H[][2], int L[]) {
    rep(i, 0, N) {
        adj[i] = {};
        poss[i] = {};
        off[i] = 0;
    }
    k = K;
    rep(i, 0, N - 1) {
        adj[H[i][0]].pb({H[i][1], L[i]});
        adj[H[i][1]].pb({H[i][0], L[i]});
    }
    dfs(0, -1); 
    if(res < 1e18) return res;
    else return -1;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 21340 KB Output is correct
2 Correct 3 ms 21340 KB Output is correct
3 Correct 3 ms 21340 KB Output is correct
4 Correct 3 ms 21340 KB Output is correct
5 Correct 3 ms 21340 KB Output is correct
6 Correct 3 ms 21340 KB Output is correct
7 Correct 3 ms 21340 KB Output is correct
8 Correct 3 ms 21340 KB Output is correct
9 Correct 3 ms 21340 KB Output is correct
10 Correct 4 ms 21340 KB Output is correct
11 Correct 3 ms 21172 KB Output is correct
12 Correct 3 ms 21340 KB Output is correct
13 Correct 3 ms 21340 KB Output is correct
14 Correct 3 ms 21340 KB Output is correct
15 Correct 3 ms 21340 KB Output is correct
16 Correct 3 ms 21340 KB Output is correct
17 Correct 3 ms 21352 KB Output is correct
18 Correct 3 ms 21340 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 21340 KB Output is correct
2 Correct 3 ms 21340 KB Output is correct
3 Correct 3 ms 21340 KB Output is correct
4 Correct 3 ms 21340 KB Output is correct
5 Correct 3 ms 21340 KB Output is correct
6 Correct 3 ms 21340 KB Output is correct
7 Correct 3 ms 21340 KB Output is correct
8 Correct 3 ms 21340 KB Output is correct
9 Correct 3 ms 21340 KB Output is correct
10 Correct 4 ms 21340 KB Output is correct
11 Correct 3 ms 21172 KB Output is correct
12 Correct 3 ms 21340 KB Output is correct
13 Correct 3 ms 21340 KB Output is correct
14 Correct 3 ms 21340 KB Output is correct
15 Correct 3 ms 21340 KB Output is correct
16 Correct 3 ms 21340 KB Output is correct
17 Correct 3 ms 21352 KB Output is correct
18 Correct 3 ms 21340 KB Output is correct
19 Correct 3 ms 21084 KB Output is correct
20 Correct 3 ms 21300 KB Output is correct
21 Correct 4 ms 21340 KB Output is correct
22 Correct 3 ms 21340 KB Output is correct
23 Correct 3 ms 21340 KB Output is correct
24 Correct 4 ms 21340 KB Output is correct
25 Correct 4 ms 21340 KB Output is correct
26 Correct 4 ms 21340 KB Output is correct
27 Correct 3 ms 21340 KB Output is correct
28 Correct 4 ms 21340 KB Output is correct
29 Correct 4 ms 21340 KB Output is correct
30 Correct 4 ms 21340 KB Output is correct
31 Correct 4 ms 21340 KB Output is correct
32 Correct 4 ms 21340 KB Output is correct
33 Correct 4 ms 21340 KB Output is correct
34 Correct 3 ms 21340 KB Output is correct
35 Correct 3 ms 21340 KB Output is correct
36 Correct 3 ms 21340 KB Output is correct
37 Correct 3 ms 21340 KB Output is correct
38 Correct 3 ms 21340 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 21340 KB Output is correct
2 Correct 3 ms 21340 KB Output is correct
3 Correct 3 ms 21340 KB Output is correct
4 Correct 3 ms 21340 KB Output is correct
5 Correct 3 ms 21340 KB Output is correct
6 Correct 3 ms 21340 KB Output is correct
7 Correct 3 ms 21340 KB Output is correct
8 Correct 3 ms 21340 KB Output is correct
9 Correct 3 ms 21340 KB Output is correct
10 Correct 4 ms 21340 KB Output is correct
11 Correct 3 ms 21172 KB Output is correct
12 Correct 3 ms 21340 KB Output is correct
13 Correct 3 ms 21340 KB Output is correct
14 Correct 3 ms 21340 KB Output is correct
15 Correct 3 ms 21340 KB Output is correct
16 Correct 3 ms 21340 KB Output is correct
17 Correct 3 ms 21352 KB Output is correct
18 Correct 3 ms 21340 KB Output is correct
19 Correct 76 ms 28500 KB Output is correct
20 Correct 72 ms 28496 KB Output is correct
21 Correct 75 ms 28688 KB Output is correct
22 Correct 70 ms 28504 KB Output is correct
23 Correct 55 ms 29020 KB Output is correct
24 Correct 50 ms 28244 KB Output is correct
25 Correct 64 ms 48980 KB Output is correct
26 Correct 58 ms 67156 KB Output is correct
27 Correct 113 ms 34456 KB Output is correct
28 Correct 222 ms 110672 KB Output is correct
29 Correct 210 ms 106056 KB Output is correct
30 Correct 95 ms 34268 KB Output is correct
31 Correct 92 ms 34256 KB Output is correct
32 Correct 109 ms 34644 KB Output is correct
33 Correct 111 ms 34268 KB Output is correct
34 Correct 81 ms 33936 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 21340 KB Output is correct
2 Correct 3 ms 21340 KB Output is correct
3 Correct 3 ms 21340 KB Output is correct
4 Correct 3 ms 21340 KB Output is correct
5 Correct 3 ms 21340 KB Output is correct
6 Correct 3 ms 21340 KB Output is correct
7 Correct 3 ms 21340 KB Output is correct
8 Correct 3 ms 21340 KB Output is correct
9 Correct 3 ms 21340 KB Output is correct
10 Correct 4 ms 21340 KB Output is correct
11 Correct 3 ms 21172 KB Output is correct
12 Correct 3 ms 21340 KB Output is correct
13 Correct 3 ms 21340 KB Output is correct
14 Correct 3 ms 21340 KB Output is correct
15 Correct 3 ms 21340 KB Output is correct
16 Correct 3 ms 21340 KB Output is correct
17 Correct 3 ms 21352 KB Output is correct
18 Correct 3 ms 21340 KB Output is correct
19 Correct 3 ms 21084 KB Output is correct
20 Correct 3 ms 21300 KB Output is correct
21 Correct 4 ms 21340 KB Output is correct
22 Correct 3 ms 21340 KB Output is correct
23 Correct 3 ms 21340 KB Output is correct
24 Correct 4 ms 21340 KB Output is correct
25 Correct 4 ms 21340 KB Output is correct
26 Correct 4 ms 21340 KB Output is correct
27 Correct 3 ms 21340 KB Output is correct
28 Correct 4 ms 21340 KB Output is correct
29 Correct 4 ms 21340 KB Output is correct
30 Correct 4 ms 21340 KB Output is correct
31 Correct 4 ms 21340 KB Output is correct
32 Correct 4 ms 21340 KB Output is correct
33 Correct 4 ms 21340 KB Output is correct
34 Correct 3 ms 21340 KB Output is correct
35 Correct 3 ms 21340 KB Output is correct
36 Correct 3 ms 21340 KB Output is correct
37 Correct 3 ms 21340 KB Output is correct
38 Correct 3 ms 21340 KB Output is correct
39 Correct 76 ms 28500 KB Output is correct
40 Correct 72 ms 28496 KB Output is correct
41 Correct 75 ms 28688 KB Output is correct
42 Correct 70 ms 28504 KB Output is correct
43 Correct 55 ms 29020 KB Output is correct
44 Correct 50 ms 28244 KB Output is correct
45 Correct 64 ms 48980 KB Output is correct
46 Correct 58 ms 67156 KB Output is correct
47 Correct 113 ms 34456 KB Output is correct
48 Correct 222 ms 110672 KB Output is correct
49 Correct 210 ms 106056 KB Output is correct
50 Correct 95 ms 34268 KB Output is correct
51 Correct 92 ms 34256 KB Output is correct
52 Correct 109 ms 34644 KB Output is correct
53 Correct 111 ms 34268 KB Output is correct
54 Correct 81 ms 33936 KB Output is correct
55 Correct 13 ms 22104 KB Output is correct
56 Correct 8 ms 21852 KB Output is correct
57 Correct 44 ms 29020 KB Output is correct
58 Correct 36 ms 28100 KB Output is correct
59 Correct 80 ms 67176 KB Output is correct
60 Correct 211 ms 110780 KB Output is correct
61 Correct 132 ms 36056 KB Output is correct
62 Correct 136 ms 36756 KB Output is correct
63 Correct 133 ms 36752 KB Output is correct
64 Correct 356 ms 44368 KB Output is correct
65 Correct 95 ms 36948 KB Output is correct
66 Correct 214 ms 95312 KB Output is correct
67 Correct 93 ms 36768 KB Output is correct
68 Correct 223 ms 45380 KB Output is correct
69 Correct 249 ms 49492 KB Output is correct
70 Correct 201 ms 45412 KB Output is correct