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답안 #625637

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
625637 2022-08-10T16:14:06 Z Soul234 경주 (Race) (IOI11_race) C++14
100 / 100
 495 ms 72100 KB 
#include<bits/stdc++.h>
using namespace std;

void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
    cerr << h; if(sizeof...(t)) cerr << ", ";
    DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL

#define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--)
#define R0F(i,a) ROF(i,0,a)
#define each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pb push_back
#define tcT template<class T
#define nl "\n"
#define fi first
#define se second

using ll = long long;
using vi = vector<int>;
using pi = pair<int,int>;
using str = string;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;

void setIO(string NAME = "") {
    cin.tie(0)->sync_with_stdio(0);
    if(sz(NAME)) {
        freopen((NAME + ".inp").c_str(),"r",stdin);
        freopen((NAME + ".out").c_str(),"w",stdout);
    }
}

tcT> bool ckmin(T&a, const T&b) {
    return b < a ? a=b,1 : 0; }
tcT> bool ckmax(T&a, const T&b) {
    return b > a ? a=b,1 : 0; }

const int MOD = 1e9 + 7;
const int MX = 2e5+5;
const ll INF = 1e18;

int N, dep[MX];
V<pi> adj[MX];
map<ll, int> mn_dep[MX];
ll dist[MX], K;
int ans = MOD;

void dfs(int u, int p) {
    mn_dep[u][dist[u]] = dep[u];
    each(ed, adj[u]) if(ed.fi != p) {
        dep[ed.fi] = dep[u] + 1;
        dist[ed.fi] = dist[u] + ed.se;
        dfs(ed.fi, u);
    }
}

void dfsCalc(int u, int p) {
    each(ed, adj[u]) if(ed.fi != p) {
        dfsCalc(ed.fi, u);
        int v = ed.fi;
        if(sz(mn_dep[u]) < sz(mn_dep[v])) swap(mn_dep[u], mn_dep[v]);
        each(val, mn_dep[v]) {
            ll du = K + dist[u]*2 - val.fi;
            if(mn_dep[u].find(du) != mn_dep[u].end()) ckmin(ans, val.se + mn_dep[u][du] - 2*dep[u]);
        }
        each(val, mn_dep[v]) {
            if(mn_dep[u].find(val.fi) != mn_dep[u].end()) ckmin(mn_dep[u][val.fi], val.se);
            else mn_dep[u][val.fi] = val.se;
        }
        mn_dep[v].clear();
    }
}

int best_path(int n, int k, int eds[][2], int cst[]) {
    N = n;
    K = k;
    F0R(i, N-1) {
        int u = eds[i][0], v = eds[i][1], w = cst[i];
        adj[u].pb({v, w});
        adj[v].pb({u, w});
    }
    dfs(0, -1);
    dfsCalc(0, -1);
    if(ans >= MOD) ans = -1;
    return ans;
}

Compilation message

race.cpp: In function 'void setIO(std::string)':
race.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
race.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 9 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 8 ms 14336 KB Output is correct
5 Correct 9 ms 14420 KB Output is correct
6 Correct 9 ms 14428 KB Output is correct
7 Correct 9 ms 14440 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14408 KB Output is correct
10 Correct 8 ms 14404 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 8 ms 14420 KB Output is correct
14 Correct 7 ms 14420 KB Output is correct
15 Correct 9 ms 14444 KB Output is correct
16 Correct 8 ms 14420 KB Output is correct
17 Correct 10 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 9 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 8 ms 14336 KB Output is correct
5 Correct 9 ms 14420 KB Output is correct
6 Correct 9 ms 14428 KB Output is correct
7 Correct 9 ms 14440 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14408 KB Output is correct
10 Correct 8 ms 14404 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 8 ms 14420 KB Output is correct
14 Correct 7 ms 14420 KB Output is correct
15 Correct 9 ms 14444 KB Output is correct
16 Correct 8 ms 14420 KB Output is correct
17 Correct 10 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 9 ms 14408 KB Output is correct
20 Correct 8 ms 14440 KB Output is correct
21 Correct 8 ms 14540 KB Output is correct
22 Correct 8 ms 14548 KB Output is correct
23 Correct 9 ms 14548 KB Output is correct
24 Correct 9 ms 14548 KB Output is correct
25 Correct 9 ms 14524 KB Output is correct
26 Correct 9 ms 14548 KB Output is correct
27 Correct 8 ms 14560 KB Output is correct
28 Correct 8 ms 14500 KB Output is correct
29 Correct 9 ms 14548 KB Output is correct
30 Correct 9 ms 14544 KB Output is correct
31 Correct 11 ms 14532 KB Output is correct
32 Correct 11 ms 14548 KB Output is correct
33 Correct 12 ms 14548 KB Output is correct
34 Correct 8 ms 14540 KB Output is correct
35 Correct 8 ms 14548 KB Output is correct
36 Correct 8 ms 14548 KB Output is correct
37 Correct 9 ms 14548 KB Output is correct
38 Correct 9 ms 14544 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 9 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 8 ms 14336 KB Output is correct
5 Correct 9 ms 14420 KB Output is correct
6 Correct 9 ms 14428 KB Output is correct
7 Correct 9 ms 14440 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14408 KB Output is correct
10 Correct 8 ms 14404 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 8 ms 14420 KB Output is correct
14 Correct 7 ms 14420 KB Output is correct
15 Correct 9 ms 14444 KB Output is correct
16 Correct 8 ms 14420 KB Output is correct
17 Correct 10 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 121 ms 27936 KB Output is correct
20 Correct 122 ms 28000 KB Output is correct
21 Correct 115 ms 27976 KB Output is correct
22 Correct 154 ms 28248 KB Output is correct
23 Correct 146 ms 28360 KB Output is correct
24 Correct 117 ms 28244 KB Output is correct
25 Correct 105 ms 35700 KB Output is correct
26 Correct 66 ms 43116 KB Output is correct
27 Correct 205 ms 41928 KB Output is correct
28 Correct 270 ms 72100 KB Output is correct
29 Correct 336 ms 70772 KB Output is correct
30 Correct 190 ms 41944 KB Output is correct
31 Correct 195 ms 41948 KB Output is correct
32 Correct 277 ms 42120 KB Output is correct
33 Correct 251 ms 41000 KB Output is correct
34 Correct 337 ms 45224 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 9 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 8 ms 14336 KB Output is correct
5 Correct 9 ms 14420 KB Output is correct
6 Correct 9 ms 14428 KB Output is correct
7 Correct 9 ms 14440 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14408 KB Output is correct
10 Correct 8 ms 14404 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 8 ms 14420 KB Output is correct
14 Correct 7 ms 14420 KB Output is correct
15 Correct 9 ms 14444 KB Output is correct
16 Correct 8 ms 14420 KB Output is correct
17 Correct 10 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 9 ms 14408 KB Output is correct
20 Correct 8 ms 14440 KB Output is correct
21 Correct 8 ms 14540 KB Output is correct
22 Correct 8 ms 14548 KB Output is correct
23 Correct 9 ms 14548 KB Output is correct
24 Correct 9 ms 14548 KB Output is correct
25 Correct 9 ms 14524 KB Output is correct
26 Correct 9 ms 14548 KB Output is correct
27 Correct 8 ms 14560 KB Output is correct
28 Correct 8 ms 14500 KB Output is correct
29 Correct 9 ms 14548 KB Output is correct
30 Correct 9 ms 14544 KB Output is correct
31 Correct 11 ms 14532 KB Output is correct
32 Correct 11 ms 14548 KB Output is correct
33 Correct 12 ms 14548 KB Output is correct
34 Correct 8 ms 14540 KB Output is correct
35 Correct 8 ms 14548 KB Output is correct
36 Correct 8 ms 14548 KB Output is correct
37 Correct 9 ms 14548 KB Output is correct
38 Correct 9 ms 14544 KB Output is correct
39 Correct 121 ms 27936 KB Output is correct
40 Correct 122 ms 28000 KB Output is correct
41 Correct 115 ms 27976 KB Output is correct
42 Correct 154 ms 28248 KB Output is correct
43 Correct 146 ms 28360 KB Output is correct
44 Correct 117 ms 28244 KB Output is correct
45 Correct 105 ms 35700 KB Output is correct
46 Correct 66 ms 43116 KB Output is correct
47 Correct 205 ms 41928 KB Output is correct
48 Correct 270 ms 72100 KB Output is correct
49 Correct 336 ms 70772 KB Output is correct
50 Correct 190 ms 41944 KB Output is correct
51 Correct 195 ms 41948 KB Output is correct
52 Correct 277 ms 42120 KB Output is correct
53 Correct 251 ms 41000 KB Output is correct
54 Correct 337 ms 45224 KB Output is correct
55 Correct 21 ms 15700 KB Output is correct
56 Correct 16 ms 15700 KB Output is correct
57 Correct 87 ms 28228 KB Output is correct
58 Correct 54 ms 27976 KB Output is correct
59 Correct 88 ms 43088 KB Output is correct
60 Correct 304 ms 71068 KB Output is correct
61 Correct 232 ms 42120 KB Output is correct
62 Correct 186 ms 42092 KB Output is correct
63 Correct 297 ms 42280 KB Output is correct
64 Correct 447 ms 42640 KB Output is correct
65 Correct 495 ms 44976 KB Output is correct
66 Correct 298 ms 67744 KB Output is correct
67 Correct 190 ms 42756 KB Output is correct
68 Correct 376 ms 42756 KB Output is correct
69 Correct 366 ms 46196 KB Output is correct
70 Correct 379 ms 41572 KB Output is correct