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답안 #299028

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
299028 2020-09-14T12:25:39 Z ToMmyDong 경주 (Race) (IOI11_race) C++17
100 / 100
 798 ms 104056 KB 
#include <bits/extc++.h>
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef pair<int,int> pii;
#define ALL(i) i.begin(),i.end()
#define SZ(i) int(i.size())
#define X first
#define Y second
#define eb emplace_back
#define pb push_back
#ifdef tmd
#define debug(...) fprintf(stderr,"#%d-(%s)=",__LINE__,#__VA_ARGS__);_do(__VA_ARGS__);
template<typename T> void _do(T &&x) {cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T &&x, S &&...y) {cerr<<x<<",";_do(y...);}
template<typename IT> ostream& printRng (ostream& os, IT bg, IT ed) {
    os << "{";
    for (IT it=bg; it!=ed; it++) {
        if (it == bg) os << *it;
        else os << "," << *it;
    }
    return os << "}";
}
template<typename T> ostream& operator << (ostream& os, const vector<T>& v) {return printRng(os,ALL(v));}
template<typename T, typename S> ostream& operator << (ostream& os, const map<T,S>& v) {return printRng(os,ALL(v));}
template<typename T, typename S> ostream& operator << (ostream& os, const pair<T,S>& v) {return os<<"("<<v.X<<","<<v.Y<<")";}
#else
#define debug(...)
#endif
#include "race.h"

int n, k;
vector<vector<pii> > edge;
vector<ll> dep;
vector<int> edp;
vector<map<ll,int> > dmp;

const int INF = 0x3f3f3f3f;

int getm (map<ll,int> &mp, ll tg) {
    auto ptr = mp.find(tg);
    if (ptr == mp.end()) return INF;
    else return ptr->Y;
}

int ans = INF;
void dfs (int nd, int par) {
    dmp[nd][dep[nd]] = edp[nd];
    for (auto &[u, w] : edge[nd]) {
        if (u != par) {
            dep[u] = dep[nd] + w;
            edp[u] = edp[nd] + 1;
            dfs(u, nd);

            if (SZ(dmp[nd]) < SZ(dmp[u])) {
                swap(dmp[nd], dmp[u]);
            }

            debug(dmp[nd]);
            for (auto &[dw, de] : dmp[u]) {
                ll rem = k - (dw-dep[nd]) + dep[nd];
                int res = getm(dmp[nd], rem);
                debug(nd, u, de, res, edp[nd]);
                ans = min(ans, de + res - 2*edp[nd]);
            }

            for (auto &[dw, de] : dmp[u]) {
                if (dmp[nd].count(dw)) {
                    int &x = dmp[nd][dw];
                    x = min(x, de);
                } else {
                    dmp[nd][dw] = de;
                }
            }
        }
    }
    debug(nd, dmp[nd]);
}
int best_path(int N, int K, int H[][2], int L[]) {
    n = N;
    k = K;
    edge.resize(N);
    for (int i=0; i<n-1; i++) {
        int u, v, w;
        u = H[i][0];
        v = H[i][1];
        w = L[i];
        edge[u].eb(v, w);
        edge[v].eb(u, w);
    }
    dep.resize(n);
    edp.resize(n);
    dmp.resize(n);
    dfs(0, -1);
    return ans <= n ? ans : -1;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 380 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 380 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 2 ms 640 KB Output is correct
22 Correct 2 ms 768 KB Output is correct
23 Correct 2 ms 768 KB Output is correct
24 Correct 2 ms 768 KB Output is correct
25 Correct 2 ms 640 KB Output is correct
26 Correct 2 ms 768 KB Output is correct
27 Correct 1 ms 512 KB Output is correct
28 Correct 2 ms 640 KB Output is correct
29 Correct 2 ms 768 KB Output is correct
30 Correct 2 ms 768 KB Output is correct
31 Correct 2 ms 768 KB Output is correct
32 Correct 2 ms 640 KB Output is correct
33 Correct 2 ms 768 KB Output is correct
34 Correct 2 ms 640 KB Output is correct
35 Correct 2 ms 648 KB Output is correct
36 Correct 2 ms 640 KB Output is correct
37 Correct 2 ms 640 KB Output is correct
38 Correct 2 ms 640 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 380 KB Output is correct
19 Correct 173 ms 30412 KB Output is correct
20 Correct 176 ms 30328 KB Output is correct
21 Correct 161 ms 30072 KB Output is correct
22 Correct 178 ms 29688 KB Output is correct
23 Correct 217 ms 42488 KB Output is correct
24 Correct 198 ms 33144 KB Output is correct
25 Correct 161 ms 30200 KB Output is correct
26 Correct 83 ms 37752 KB Output is correct
27 Correct 278 ms 48624 KB Output is correct
28 Correct 401 ms 87928 KB Output is correct
29 Correct 428 ms 86264 KB Output is correct
30 Correct 278 ms 48632 KB Output is correct
31 Correct 271 ms 48632 KB Output is correct
32 Correct 357 ms 48760 KB Output is correct
33 Correct 355 ms 53624 KB Output is correct
34 Correct 471 ms 86392 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 380 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 2 ms 640 KB Output is correct
22 Correct 2 ms 768 KB Output is correct
23 Correct 2 ms 768 KB Output is correct
24 Correct 2 ms 768 KB Output is correct
25 Correct 2 ms 640 KB Output is correct
26 Correct 2 ms 768 KB Output is correct
27 Correct 1 ms 512 KB Output is correct
28 Correct 2 ms 640 KB Output is correct
29 Correct 2 ms 768 KB Output is correct
30 Correct 2 ms 768 KB Output is correct
31 Correct 2 ms 768 KB Output is correct
32 Correct 2 ms 640 KB Output is correct
33 Correct 2 ms 768 KB Output is correct
34 Correct 2 ms 640 KB Output is correct
35 Correct 2 ms 648 KB Output is correct
36 Correct 2 ms 640 KB Output is correct
37 Correct 2 ms 640 KB Output is correct
38 Correct 2 ms 640 KB Output is correct
39 Correct 173 ms 30412 KB Output is correct
40 Correct 176 ms 30328 KB Output is correct
41 Correct 161 ms 30072 KB Output is correct
42 Correct 178 ms 29688 KB Output is correct
43 Correct 217 ms 42488 KB Output is correct
44 Correct 198 ms 33144 KB Output is correct
45 Correct 161 ms 30200 KB Output is correct
46 Correct 83 ms 37752 KB Output is correct
47 Correct 278 ms 48624 KB Output is correct
48 Correct 401 ms 87928 KB Output is correct
49 Correct 428 ms 86264 KB Output is correct
50 Correct 278 ms 48632 KB Output is correct
51 Correct 271 ms 48632 KB Output is correct
52 Correct 357 ms 48760 KB Output is correct
53 Correct 355 ms 53624 KB Output is correct
54 Correct 471 ms 86392 KB Output is correct
55 Correct 20 ms 4352 KB Output is correct
56 Correct 13 ms 3072 KB Output is correct
57 Correct 107 ms 27772 KB Output is correct
58 Correct 65 ms 20972 KB Output is correct
59 Correct 117 ms 43924 KB Output is correct
60 Correct 497 ms 86624 KB Output is correct
61 Correct 319 ms 52088 KB Output is correct
62 Correct 266 ms 48760 KB Output is correct
63 Correct 365 ms 48652 KB Output is correct
64 Correct 630 ms 104056 KB Output is correct
65 Correct 692 ms 102136 KB Output is correct
66 Correct 531 ms 82680 KB Output is correct
67 Correct 290 ms 43156 KB Output is correct
68 Correct 513 ms 65528 KB Output is correct
69 Correct 798 ms 70648 KB Output is correct
70 Correct 508 ms 62840 KB Output is correct