oj.uz

답안 #834033

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
834033 2023-08-22T10:16:48 Z Essa2006 경주 (Race) (IOI11_race) C++14
100 / 100
 864 ms 118844 KB 
#include<bits/stdc++.h>
#include "race.h"
using namespace std;
#define ll long long
#define endl '\n'
#define FF first
#define SS second
#define all(a) a.begin(), a.end()
#define mod (ll)(1000000007)
#define MAX_N 500000
const int inf=1e9;
int nn;
vector<ll>P, Order, ofst2;
vector<ll>ofst;
vector<vector<ll>>A;
vector<map<ll, ll>>Has;
map<pair<ll, ll>, ll>mp;
void pre(){
    P.clear(), Order.clear(), ofst.clear(), ofst2.clear(), A.clear(), Has.clear(), mp.clear();
    P.resize(nn+1), ofst.resize(nn+1), ofst2.resize(nn+1), A.resize(nn+1), Has.resize(nn+1);
}

void dfs(int u){
    for(int i=0;i<A[u].size();i++){
        int v=A[u][i];
        if(v!=P[u])
            P[v]=u, dfs(v);
    }
    Order.push_back(u);
}
int best_path(int n, int k, int H[][2], int L[]){
    nn=n;
    pre();
    ll ans=inf;
    for(int i=0;i<n-1;i++){
        int u=H[i][0], v=H[i][1];
        A[u].push_back(v);
        A[v].push_back(u);
        mp[{u, v}]=mp[{v, u}]=L[i];
    }
    dfs(0);
    for(int kk=0;kk<n;kk++){
        int u=Order[kk], mx=-1;
        for(int i=0;i<A[u].size();i++){
            int v=A[u][i];
            if(v==P[u])
                continue;
            if(mx==-1 || Has[v].size()>Has[mx].size())
                mx=v;
        }
        if(mx!=-1)
            ofst[u]=ofst[mx]+mp[{u, mx}], ofst2[u]=ofst2[mx]+1, swap(Has[u], Has[mx]);
        for(int i=0;i<A[u].size();i++){
            int v=A[u][i];
            if(v==P[u] || v==mx)
                continue;
            vector<array<ll, 2>>New;
            for(auto it:Has[v]){
                ll len=it.FF+ofst[v]+mp[{u, v}], need=it.SS+ofst2[v]+1;
                if(Has[u].count(k-len-ofst[u]))
                    ans=min(ans, need+Has[u][k-len-ofst[u]]+ofst2[u]);
                New.push_back({len, need});
            }
            for(int i=0;i<New.size();i++){
                int len=New[i][0], need=New[i][1];
                if(!Has[u].count(len-ofst[u]))
                        Has[u][len-ofst[u]]=need-ofst2[u];
                else
                    Has[u][len-ofst[u]]=min(Has[u][len-ofst[u]], need-ofst2[u]);
            }
        }
        Has[u][-ofst[u]]=-ofst2[u];
        if(Has[u].count(k-ofst[u])){
            ans=min(ans, Has[u][k-ofst[u]]+ofst2[u]);
        }
    }
    if(ans==inf)
        ans=-1;
    return ans;
}

Compilation message

race.cpp: In function 'void dfs(int)':
race.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i=0;i<A[u].size();i++){
      |                 ~^~~~~~~~~~~~
race.cpp: In function 'int best_path(int, int, int (*)[2], int*)':
race.cpp:44:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         for(int i=0;i<A[u].size();i++){
      |                     ~^~~~~~~~~~~~
race.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for(int i=0;i<A[u].size();i++){
      |                     ~^~~~~~~~~~~~
race.cpp:64:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<long long int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |             for(int i=0;i<New.size();i++){
      |                         ~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 360 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 360 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 308 KB Output is correct
21 Correct 2 ms 828 KB Output is correct
22 Correct 2 ms 724 KB Output is correct
23 Correct 2 ms 704 KB Output is correct
24 Correct 2 ms 724 KB Output is correct
25 Correct 2 ms 724 KB Output is correct
26 Correct 3 ms 724 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 2 ms 724 KB Output is correct
29 Correct 2 ms 724 KB Output is correct
30 Correct 2 ms 724 KB Output is correct
31 Correct 2 ms 724 KB Output is correct
32 Correct 2 ms 724 KB Output is correct
33 Correct 3 ms 724 KB Output is correct
34 Correct 2 ms 596 KB Output is correct
35 Correct 1 ms 596 KB Output is correct
36 Correct 1 ms 596 KB Output is correct
37 Correct 1 ms 596 KB Output is correct
38 Correct 2 ms 596 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 360 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 187 ms 39060 KB Output is correct
20 Correct 196 ms 38972 KB Output is correct
21 Correct 191 ms 39064 KB Output is correct
22 Correct 258 ms 39160 KB Output is correct
23 Correct 280 ms 52288 KB Output is correct
24 Correct 231 ms 45328 KB Output is correct
25 Correct 194 ms 32440 KB Output is correct
26 Correct 82 ms 35568 KB Output is correct
27 Correct 476 ms 68248 KB Output is correct
28 Correct 539 ms 82584 KB Output is correct
29 Correct 531 ms 82484 KB Output is correct
30 Correct 442 ms 68304 KB Output is correct
31 Correct 450 ms 68192 KB Output is correct
32 Correct 593 ms 68168 KB Output is correct
33 Correct 539 ms 66808 KB Output is correct
34 Correct 601 ms 98776 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 360 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 308 KB Output is correct
21 Correct 2 ms 828 KB Output is correct
22 Correct 2 ms 724 KB Output is correct
23 Correct 2 ms 704 KB Output is correct
24 Correct 2 ms 724 KB Output is correct
25 Correct 2 ms 724 KB Output is correct
26 Correct 3 ms 724 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 2 ms 724 KB Output is correct
29 Correct 2 ms 724 KB Output is correct
30 Correct 2 ms 724 KB Output is correct
31 Correct 2 ms 724 KB Output is correct
32 Correct 2 ms 724 KB Output is correct
33 Correct 3 ms 724 KB Output is correct
34 Correct 2 ms 596 KB Output is correct
35 Correct 1 ms 596 KB Output is correct
36 Correct 1 ms 596 KB Output is correct
37 Correct 1 ms 596 KB Output is correct
38 Correct 2 ms 596 KB Output is correct
39 Correct 187 ms 39060 KB Output is correct
40 Correct 196 ms 38972 KB Output is correct
41 Correct 191 ms 39064 KB Output is correct
42 Correct 258 ms 39160 KB Output is correct
43 Correct 280 ms 52288 KB Output is correct
44 Correct 231 ms 45328 KB Output is correct
45 Correct 194 ms 32440 KB Output is correct
46 Correct 82 ms 35568 KB Output is correct
47 Correct 476 ms 68248 KB Output is correct
48 Correct 539 ms 82584 KB Output is correct
49 Correct 531 ms 82484 KB Output is correct
50 Correct 442 ms 68304 KB Output is correct
51 Correct 450 ms 68192 KB Output is correct
52 Correct 593 ms 68168 KB Output is correct
53 Correct 539 ms 66808 KB Output is correct
54 Correct 601 ms 98776 KB Output is correct
55 Correct 20 ms 5332 KB Output is correct
56 Correct 11 ms 3924 KB Output is correct
57 Correct 144 ms 37312 KB Output is correct
58 Correct 109 ms 34508 KB Output is correct
59 Correct 112 ms 41472 KB Output is correct
60 Correct 523 ms 82412 KB Output is correct
61 Correct 444 ms 71672 KB Output is correct
62 Correct 401 ms 68136 KB Output is correct
63 Correct 582 ms 68156 KB Output is correct
64 Correct 861 ms 118700 KB Output is correct
65 Correct 864 ms 118844 KB Output is correct
66 Correct 546 ms 82508 KB Output is correct
67 Correct 514 ms 68620 KB Output is correct
68 Correct 786 ms 85756 KB Output is correct
69 Correct 763 ms 86716 KB Output is correct
70 Correct 721 ms 81996 KB Output is correct