oj.uz

답안 #372767

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
372767 2021-03-01T13:53:03 Z Lightning 경주 (Race) (IOI11_race) C++14
100 / 100
 1292 ms 45172 KB 
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,sse3,sse4,popcnt,abm,mmx")
 
#include "race.h"
#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <set>
#include <map>
#include <iomanip>
#include <cassert>
#include <stack>
#include <queue>
#include <deque>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>-
 
using namespace std;
//using namespace __gnu_pbds;
 
typedef long long ll;
//#define int ll
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
 
// template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//  order_of_key (k) : Number of items strictly smaller than k .
//  find_by_order(k) : K-th element in a set (counting from zero).
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define pb push_back
#define ppb pop_back
#define mkp make_pair
#define F first
#define S second
#define lb lower_bound
#define ub upper_bound
#define show(a) cerr << #a <<" -> "<< a <<" "
#define nl cerr <<"\n"
 
 
const int MAXN = 2e5 + 5;
const int oo = 1e18 + 5;
 
int n, k, h[MAXN][2], l[MAXN];
vector <pii> g[MAXN];
int sz[MAXN], ANS = oo;
bool del[MAXN];
set <pii> st;
 
void calcSZ(int v, int pr = -1) {
    sz[v] = 1;
    for (pii x : g[v]) {
        int to = x.F;
        if (to == pr || del[to]) { continue; }
        calcSZ(to, v);
        sz[v] += sz[to];
    }
}
 
int findCentroid(int v, int pr = -1) {
    for (pii x : g[v]) {
        int to = x.F;
        if (to == pr || del[to]) { continue; }
        if (sz[to] > sz[v] / 2) {
            sz[v] -= sz[to];
            sz[to] += sz[v];
            return findCentroid(to, v);
        }
    }
    return v;
}
 
void update(int v, int pr, int lvl, int d) {
    st.insert({d, lvl});
    for (pii x : g[v]) {
        int to = x.F, w = x.S;
        if (to == pr || del[to]) { continue; }
        update(to, v, lvl + 1, d + w);
    }
}
 
void query(int v, int pr, int lvl, int d) {
    auto it = st.lower_bound({k - d, 0ll});
    if (it != st.end()) {
        int d2 = it -> F, lvl2 = it -> S;
        if (d + d2 == k) {
            ANS = min(ANS, lvl + lvl2);
        }
    }
    for (pii x : g[v]) {
        int to = x.F, w = x.S;
        if (to == pr || del[to]) { continue; }
        query(to, v, lvl + 1, d + w);
    }
}
 
void travel(int root) {
    calcSZ(root);
    int c = findCentroid(root);
    st.insert({0, 0});
    for (pii x : g[c]) {
        int to = x.F, w = x.S;
        if (del[to]) { continue; }
        query(to, c, 1, w);
        update(to, c, 1, w);
    }
    st.clear();
    del[c] = 1;
    for (pii x : g[c]) {
        int to = x.F;
        if (del[to]) { continue; }
        travel(to);
    }
}
 
int best_path(int N, int K, int H[][2], int L[]) {
    n = N, k = K;
    for (int i = 0; i < n-1; ++i) {
        h[i][0] = H[i][0];
        h[i][1] = H[i][1];
    }
    for (int i = 0; i < n-1; ++i) {
        l[i] = L[i];
        int a = h[i][0], b = h[i][1], w = l[i];
        g[a].pb({b, w});
        g[b].pb({a, w});
    }
 
    travel(0);
 
    if (ANS == oo) { return -1; }
    return ANS;
}

Compilation message

race.cpp:44:21: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   44 | const int oo = 1e18 + 5;
      |                ~~~~~^~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 5 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5248 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 5 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5248 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 5 ms 5100 KB Output is correct
22 Correct 5 ms 5228 KB Output is correct
23 Correct 5 ms 5228 KB Output is correct
24 Correct 5 ms 5228 KB Output is correct
25 Correct 5 ms 5228 KB Output is correct
26 Correct 5 ms 5228 KB Output is correct
27 Correct 5 ms 5100 KB Output is correct
28 Correct 5 ms 5228 KB Output is correct
29 Correct 5 ms 5228 KB Output is correct
30 Correct 7 ms 5228 KB Output is correct
31 Correct 6 ms 5228 KB Output is correct
32 Correct 5 ms 5228 KB Output is correct
33 Correct 5 ms 5228 KB Output is correct
34 Correct 5 ms 5228 KB Output is correct
35 Correct 5 ms 5228 KB Output is correct
36 Correct 5 ms 5228 KB Output is correct
37 Correct 5 ms 5100 KB Output is correct
38 Correct 5 ms 5100 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 5 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5248 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 333 ms 13036 KB Output is correct
20 Correct 343 ms 13036 KB Output is correct
21 Correct 319 ms 13036 KB Output is correct
22 Correct 268 ms 13036 KB Output is correct
23 Correct 314 ms 13548 KB Output is correct
24 Correct 139 ms 13292 KB Output is correct
25 Correct 386 ms 21236 KB Output is correct
26 Correct 239 ms 24812 KB Output is correct
27 Correct 386 ms 23788 KB Output is correct
28 Correct 1008 ms 45172 KB Output is correct
29 Correct 1020 ms 44088 KB Output is correct
30 Correct 366 ms 23788 KB Output is correct
31 Correct 361 ms 23788 KB Output is correct
32 Correct 457 ms 23660 KB Output is correct
33 Correct 507 ms 20316 KB Output is correct
34 Correct 950 ms 30476 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 5 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5248 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 5 ms 5100 KB Output is correct
22 Correct 5 ms 5228 KB Output is correct
23 Correct 5 ms 5228 KB Output is correct
24 Correct 5 ms 5228 KB Output is correct
25 Correct 5 ms 5228 KB Output is correct
26 Correct 5 ms 5228 KB Output is correct
27 Correct 5 ms 5100 KB Output is correct
28 Correct 5 ms 5228 KB Output is correct
29 Correct 5 ms 5228 KB Output is correct
30 Correct 7 ms 5228 KB Output is correct
31 Correct 6 ms 5228 KB Output is correct
32 Correct 5 ms 5228 KB Output is correct
33 Correct 5 ms 5228 KB Output is correct
34 Correct 5 ms 5228 KB Output is correct
35 Correct 5 ms 5228 KB Output is correct
36 Correct 5 ms 5228 KB Output is correct
37 Correct 5 ms 5100 KB Output is correct
38 Correct 5 ms 5100 KB Output is correct
39 Correct 333 ms 13036 KB Output is correct
40 Correct 343 ms 13036 KB Output is correct
41 Correct 319 ms 13036 KB Output is correct
42 Correct 268 ms 13036 KB Output is correct
43 Correct 314 ms 13548 KB Output is correct
44 Correct 139 ms 13292 KB Output is correct
45 Correct 386 ms 21236 KB Output is correct
46 Correct 239 ms 24812 KB Output is correct
47 Correct 386 ms 23788 KB Output is correct
48 Correct 1008 ms 45172 KB Output is correct
49 Correct 1020 ms 44088 KB Output is correct
50 Correct 366 ms 23788 KB Output is correct
51 Correct 361 ms 23788 KB Output is correct
52 Correct 457 ms 23660 KB Output is correct
53 Correct 507 ms 20316 KB Output is correct
54 Correct 950 ms 30476 KB Output is correct
55 Correct 24 ms 6300 KB Output is correct
56 Correct 19 ms 5868 KB Output is correct
57 Correct 159 ms 13164 KB Output is correct
58 Correct 53 ms 12896 KB Output is correct
59 Correct 278 ms 24940 KB Output is correct
60 Correct 1018 ms 44276 KB Output is correct
61 Correct 405 ms 26872 KB Output is correct
62 Correct 362 ms 24044 KB Output is correct
63 Correct 443 ms 23832 KB Output is correct
64 Correct 1292 ms 30224 KB Output is correct
65 Correct 1026 ms 31448 KB Output is correct
66 Correct 990 ms 41452 KB Output is correct
67 Correct 161 ms 21980 KB Output is correct
68 Correct 615 ms 31212 KB Output is correct
69 Correct 621 ms 31468 KB Output is correct
70 Correct 562 ms 30060 KB Output is correct