oj.uz

답안 #471172

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
471172 2021-09-07T15:33:14 Z jeroenodb 경주 (Race) (IOI11_race) C++14
100 / 100
 424 ms 60404 KB 
#include "race.h"
#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 2e5+1, oo = 1e9;
static int ans,k;

struct paths {
    map<ll,int> m;
    ll delta=0;
    int extraedge=0;
    int get(ll l) {
        ll tmp = l-delta;
        auto iter = m.find(tmp);
        if(iter!=m.end()) return iter->second+extraedge;
        return oo;
    }
    void insert(ll l, int i) {
        i-=extraedge;
        ll tmp = l-delta;
        auto iter = m.find(tmp);
        if(iter!=m.end()) iter->second = min(i,iter->second);
        else m[tmp] = i;
    }
};
void merge(paths& a, paths& b) {
    if(a.m.size()<b.m.size()) swap(a,b);
    for(auto& p: b.m) {
        int real = p.first+b.delta;
        ans = min(ans,p.second+b.extraedge+a.get(k-real));
    }
    for(auto& p: b.m) {
        auto real = p.first+b.delta;
        a.insert(real,p.second+b.extraedge);
    }
}
vector<pi> adj[mxN];
void dfs(int at, int from, int ww, paths& parent) {
    paths p;
    p.insert(0,0);
    for(auto [to,w]: adj[at]) {
        if(to==from) continue;
        dfs(to,at,w,p);
    }
    p.delta+=ww,p.extraedge++;
    merge(parent,p);
}
int best_path(int N, int K, int H[][2], int L[]) {
    int n = N;
    k=K, ans = oo;
    for(int i=0;i<n;++i) adj[i].clear();
    for(int i=0;i<n-1;++i) {
        int a = H[i][0], b = H[i][1], w = L[i];
        adj[a].emplace_back(b,w);
        adj[b].emplace_back(a,w);
    }
    paths empty;
    dfs(0,-1,0,empty);
    return ans==oo?-1:ans;
}

Compilation message

race.cpp: In function 'void dfs(int, int, int, paths&)':
race.cpp:48:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   48 |     for(auto [to,w]: adj[at]) {
      |              ^

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 5028 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 5028 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 4 ms 5068 KB Output is correct
22 Correct 5 ms 5068 KB Output is correct
23 Correct 4 ms 5068 KB Output is correct
24 Correct 5 ms 5068 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 4 ms 5132 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 5 ms 5140 KB Output is correct
29 Correct 5 ms 5004 KB Output is correct
30 Correct 5 ms 5068 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 5 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 5028 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 102 ms 9932 KB Output is correct
20 Correct 94 ms 9896 KB Output is correct
21 Correct 93 ms 9840 KB Output is correct
22 Correct 90 ms 9880 KB Output is correct
23 Correct 123 ms 10340 KB Output is correct
24 Correct 101 ms 10084 KB Output is correct
25 Correct 79 ms 21056 KB Output is correct
26 Correct 70 ms 32456 KB Output is correct
27 Correct 179 ms 18088 KB Output is correct
28 Correct 255 ms 60404 KB Output is correct
29 Correct 256 ms 58948 KB Output is correct
30 Correct 180 ms 18004 KB Output is correct
31 Correct 179 ms 17988 KB Output is correct
32 Correct 199 ms 18268 KB Output is correct
33 Correct 178 ms 17476 KB Output is correct
34 Correct 327 ms 30412 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 5028 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 4 ms 5068 KB Output is correct
22 Correct 5 ms 5068 KB Output is correct
23 Correct 4 ms 5068 KB Output is correct
24 Correct 5 ms 5068 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 4 ms 5132 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 5 ms 5140 KB Output is correct
29 Correct 5 ms 5004 KB Output is correct
30 Correct 5 ms 5068 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 5 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 102 ms 9932 KB Output is correct
40 Correct 94 ms 9896 KB Output is correct
41 Correct 93 ms 9840 KB Output is correct
42 Correct 90 ms 9880 KB Output is correct
43 Correct 123 ms 10340 KB Output is correct
44 Correct 101 ms 10084 KB Output is correct
45 Correct 79 ms 21056 KB Output is correct
46 Correct 70 ms 32456 KB Output is correct
47 Correct 179 ms 18088 KB Output is correct
48 Correct 255 ms 60404 KB Output is correct
49 Correct 256 ms 58948 KB Output is correct
50 Correct 180 ms 18004 KB Output is correct
51 Correct 179 ms 17988 KB Output is correct
52 Correct 199 ms 18268 KB Output is correct
53 Correct 178 ms 17476 KB Output is correct
54 Correct 327 ms 30412 KB Output is correct
55 Correct 17 ms 5996 KB Output is correct
56 Correct 10 ms 5524 KB Output is correct
57 Correct 63 ms 11368 KB Output is correct
58 Correct 49 ms 11096 KB Output is correct
59 Correct 102 ms 32524 KB Output is correct
60 Correct 245 ms 59332 KB Output is correct
61 Correct 208 ms 19896 KB Output is correct
62 Correct 180 ms 18076 KB Output is correct
63 Correct 194 ms 18264 KB Output is correct
64 Correct 424 ms 26484 KB Output is correct
65 Correct 424 ms 30652 KB Output is correct
66 Correct 276 ms 56004 KB Output is correct
67 Correct 132 ms 18412 KB Output is correct
68 Correct 321 ms 28980 KB Output is correct
69 Correct 343 ms 33348 KB Output is correct
70 Correct 286 ms 28100 KB Output is correct