oj.uz

답안 #868936

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
868936 2023-11-02T12:59:50 Z TB_ 경주 (Race) (IOI11_race) C++17
100 / 100
 264 ms 50260 KB 
#include <bits/stdc++.h>
using namespace std;

#undef _GLIBCXX_DEBUG                // disable run-time bound checking, etc
#pragma GCC optimize("Ofast,inline") // Ofast = O3,fast-math,allow-store-data-races,no-protect-parens
#pragma GCC optimize ("unroll-loops")

// #pragma GCC target("bmi,bmi2,lzcnt,popcnt")                      // bit manipulation
// #pragma GCC target("movbe")                                      // byte swap
// #pragma GCC target("aes,pclmul,rdrnd")                           // encryption
// #pragma GCC target("avx,avx2,f16c,fma,sse3,ssse3,sse4.1,sse4.2") // SIMD

// #include <bits/extc++.h>
// using namespace __gnu_pbds;
// template<class T>using ordered_set = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;
// template<class T>using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag,tree_order_statistics_node_update>;

#define ll long long
#define INF (ll)1e16+7
#define fo(i, n) for(ll i=0;i<((ll)n);i++)
#define deb(x) cout << #x << " = " << (x) << endl;
#define deb2(x, y) cout << #x << " = " << (x) << ", " << #y << " = " << (y) << endl
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define LSOne(S) ((S) & (-S))
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
inline int readint(){ int v = 0; char c; while((c = getchar()) != EOF && c != ' ' && c != '\n'){ v *= 10; v += c - '0'; } return v; }
inline int readintsigned() { int v = 0; int sign = 1; char c = getchar(); if (c == '-') { sign = -1; } else { v += c - '0'; } while ((c = getchar()) != EOF && c != ' ' && c != '\n') { v *= 10; v += c - '0'; } return v * sign; }
inline string readstring() { string s; char c; while ((c = getchar()) != EOF && c != '\n' && c != ' ') { s.push_back(c); } return s; }
template <class result_t=std::chrono::milliseconds,class clock_t=std::chrono::steady_clock,class duration_t = std::chrono::milliseconds>
auto since(std::chrono::time_point<clock_t, duration_t> const& start){return std::chrono::duration_cast<result_t>(clock_t::now() - start);}
typedef pair<int, int> pii;
typedef pair<ll, ll> pl;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vpii;
typedef vector<pl> vpl;
typedef vector<vi> vvi;
typedef vector<vl> vvl;
typedef vector<vpii> vvpii;
typedef vector<vpl> vvpl;

vvpl adj(200001);
int removed[200001], subtreeSiz[200001];
ll k, currIt = 0;
vector<pl> found(1000001, pl{1, INF});
vpl saved;

int getSiz(int u, int last = -1){
    if(removed[u]) return 0;
    int res = 1;
    for(auto &[v, w] : adj[u]){
        if(v == last) continue;
        res += getSiz(v, u);
    }
    subtreeSiz[u] = res;
    return res;
}

int getCentroid(int u, int last, int siz){
    for(auto &[v, w] : adj[u]){
        if(v == last || removed[v]) continue;
        if(subtreeSiz[v] * 2 > siz) return getCentroid(v, u, siz);
    }
    return u;
}

ll compute(int u, int last, ll l, int steps = 1){
    if(removed[u] || k-l<0) return INF;
    saved.pb({l, steps});
    ll res = INF;
    if(found[k-l].F==currIt) res = found[k-l].S+steps;
    for(auto &[v, w] : adj[u]){
        if(v == last) continue;
        res = min(res, compute(v, u, l+w, steps+1));
    }
    return res;
}

ll CentroidDecomp(int node){
    int centroid = getCentroid(node, -1, getSiz(node));
    currIt--;

    removed[centroid] = 1;
    ll res = INF;
    found[0] = {currIt, 0}; 
    for(auto &[v, w] : adj[centroid]){
        saved.clear();
        res = min(res, compute(v, -1, w));
        for(auto &[v1, v2] : saved) {
            found[v1] = min(found[v1], {currIt, v2});
        }
    }

    for(auto &[v, w] : adj[centroid]){
        if(removed[v]) continue;
        res = min(res, CentroidDecomp(v));
    }
    return res;
}

int best_path(int N, int K, int H[][2], int L[]){
    k = K;
    fo(i, N-1){
        adj[H[i][0]].pb({H[i][1], L[i]});
        adj[H[i][1]].pb({H[i][0], L[i]});
    }
    ll res = CentroidDecomp(0);

    return (res>1e16?-1:res);
}


// #define MAX_N 500000

// static int N, K;
// static int H[MAX_N][2];
// static int L[MAX_N];
// static int solution;

// inline 
// void my_assert(int e) {if (!e) abort();}

// void read_input()
// {
//   int i;
//   my_assert(2==scanf("%d %d",&N,&K));
//   for(i=0; i<N-1; i++)
//     my_assert(3==scanf("%d %d %d",&H[i][0],&H[i][1],&L[i]));
//   my_assert(1==scanf("%d",&solution));
// }

// int main()
// {
//   int ans;
//   read_input();
//   ans = best_path(N,K,H,L);
//   if(ans==solution)
//     printf("Correct.\n");
//   else
//     printf("Incorrect. Returned %d, Expected %d.\n",ans,solution);

//   return 0;
// }

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 24920 KB Output is correct
2 Correct 5 ms 24920 KB Output is correct
3 Correct 5 ms 24924 KB Output is correct
4 Correct 5 ms 24924 KB Output is correct
5 Correct 5 ms 24668 KB Output is correct
6 Correct 5 ms 24920 KB Output is correct
7 Correct 5 ms 24920 KB Output is correct
8 Correct 5 ms 24924 KB Output is correct
9 Correct 5 ms 24736 KB Output is correct
10 Correct 5 ms 24924 KB Output is correct
11 Correct 5 ms 24924 KB Output is correct
12 Correct 5 ms 24924 KB Output is correct
13 Correct 5 ms 24684 KB Output is correct
14 Correct 6 ms 24924 KB Output is correct
15 Correct 5 ms 24924 KB Output is correct
16 Correct 5 ms 24924 KB Output is correct
17 Correct 5 ms 24924 KB Output is correct
18 Correct 5 ms 24924 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 24920 KB Output is correct
2 Correct 5 ms 24920 KB Output is correct
3 Correct 5 ms 24924 KB Output is correct
4 Correct 5 ms 24924 KB Output is correct
5 Correct 5 ms 24668 KB Output is correct
6 Correct 5 ms 24920 KB Output is correct
7 Correct 5 ms 24920 KB Output is correct
8 Correct 5 ms 24924 KB Output is correct
9 Correct 5 ms 24736 KB Output is correct
10 Correct 5 ms 24924 KB Output is correct
11 Correct 5 ms 24924 KB Output is correct
12 Correct 5 ms 24924 KB Output is correct
13 Correct 5 ms 24684 KB Output is correct
14 Correct 6 ms 24924 KB Output is correct
15 Correct 5 ms 24924 KB Output is correct
16 Correct 5 ms 24924 KB Output is correct
17 Correct 5 ms 24924 KB Output is correct
18 Correct 5 ms 24924 KB Output is correct
19 Correct 5 ms 24668 KB Output is correct
20 Correct 5 ms 24924 KB Output is correct
21 Correct 5 ms 24924 KB Output is correct
22 Correct 5 ms 24820 KB Output is correct
23 Correct 5 ms 24920 KB Output is correct
24 Correct 6 ms 24924 KB Output is correct
25 Correct 6 ms 24924 KB Output is correct
26 Correct 6 ms 24920 KB Output is correct
27 Correct 5 ms 24924 KB Output is correct
28 Correct 6 ms 24924 KB Output is correct
29 Correct 6 ms 24924 KB Output is correct
30 Correct 5 ms 24924 KB Output is correct
31 Correct 5 ms 24924 KB Output is correct
32 Correct 7 ms 24924 KB Output is correct
33 Correct 6 ms 24924 KB Output is correct
34 Correct 7 ms 24924 KB Output is correct
35 Correct 5 ms 24924 KB Output is correct
36 Correct 5 ms 24924 KB Output is correct
37 Correct 5 ms 25176 KB Output is correct
38 Correct 6 ms 24836 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 24920 KB Output is correct
2 Correct 5 ms 24920 KB Output is correct
3 Correct 5 ms 24924 KB Output is correct
4 Correct 5 ms 24924 KB Output is correct
5 Correct 5 ms 24668 KB Output is correct
6 Correct 5 ms 24920 KB Output is correct
7 Correct 5 ms 24920 KB Output is correct
8 Correct 5 ms 24924 KB Output is correct
9 Correct 5 ms 24736 KB Output is correct
10 Correct 5 ms 24924 KB Output is correct
11 Correct 5 ms 24924 KB Output is correct
12 Correct 5 ms 24924 KB Output is correct
13 Correct 5 ms 24684 KB Output is correct
14 Correct 6 ms 24924 KB Output is correct
15 Correct 5 ms 24924 KB Output is correct
16 Correct 5 ms 24924 KB Output is correct
17 Correct 5 ms 24924 KB Output is correct
18 Correct 5 ms 24924 KB Output is correct
19 Correct 73 ms 32596 KB Output is correct
20 Correct 72 ms 32604 KB Output is correct
21 Correct 80 ms 33056 KB Output is correct
22 Correct 80 ms 33232 KB Output is correct
23 Correct 50 ms 32808 KB Output is correct
24 Correct 39 ms 32196 KB Output is correct
25 Correct 85 ms 34388 KB Output is correct
26 Correct 74 ms 38508 KB Output is correct
27 Correct 142 ms 38868 KB Output is correct
28 Correct 151 ms 46200 KB Output is correct
29 Correct 149 ms 45696 KB Output is correct
30 Correct 102 ms 38736 KB Output is correct
31 Correct 102 ms 38856 KB Output is correct
32 Correct 119 ms 38940 KB Output is correct
33 Correct 138 ms 37712 KB Output is correct
34 Correct 113 ms 37456 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 24920 KB Output is correct
2 Correct 5 ms 24920 KB Output is correct
3 Correct 5 ms 24924 KB Output is correct
4 Correct 5 ms 24924 KB Output is correct
5 Correct 5 ms 24668 KB Output is correct
6 Correct 5 ms 24920 KB Output is correct
7 Correct 5 ms 24920 KB Output is correct
8 Correct 5 ms 24924 KB Output is correct
9 Correct 5 ms 24736 KB Output is correct
10 Correct 5 ms 24924 KB Output is correct
11 Correct 5 ms 24924 KB Output is correct
12 Correct 5 ms 24924 KB Output is correct
13 Correct 5 ms 24684 KB Output is correct
14 Correct 6 ms 24924 KB Output is correct
15 Correct 5 ms 24924 KB Output is correct
16 Correct 5 ms 24924 KB Output is correct
17 Correct 5 ms 24924 KB Output is correct
18 Correct 5 ms 24924 KB Output is correct
19 Correct 5 ms 24668 KB Output is correct
20 Correct 5 ms 24924 KB Output is correct
21 Correct 5 ms 24924 KB Output is correct
22 Correct 5 ms 24820 KB Output is correct
23 Correct 5 ms 24920 KB Output is correct
24 Correct 6 ms 24924 KB Output is correct
25 Correct 6 ms 24924 KB Output is correct
26 Correct 6 ms 24920 KB Output is correct
27 Correct 5 ms 24924 KB Output is correct
28 Correct 6 ms 24924 KB Output is correct
29 Correct 6 ms 24924 KB Output is correct
30 Correct 5 ms 24924 KB Output is correct
31 Correct 5 ms 24924 KB Output is correct
32 Correct 7 ms 24924 KB Output is correct
33 Correct 6 ms 24924 KB Output is correct
34 Correct 7 ms 24924 KB Output is correct
35 Correct 5 ms 24924 KB Output is correct
36 Correct 5 ms 24924 KB Output is correct
37 Correct 5 ms 25176 KB Output is correct
38 Correct 6 ms 24836 KB Output is correct
39 Correct 73 ms 32596 KB Output is correct
40 Correct 72 ms 32604 KB Output is correct
41 Correct 80 ms 33056 KB Output is correct
42 Correct 80 ms 33232 KB Output is correct
43 Correct 50 ms 32808 KB Output is correct
44 Correct 39 ms 32196 KB Output is correct
45 Correct 85 ms 34388 KB Output is correct
46 Correct 74 ms 38508 KB Output is correct
47 Correct 142 ms 38868 KB Output is correct
48 Correct 151 ms 46200 KB Output is correct
49 Correct 149 ms 45696 KB Output is correct
50 Correct 102 ms 38736 KB Output is correct
51 Correct 102 ms 38856 KB Output is correct
52 Correct 119 ms 38940 KB Output is correct
53 Correct 138 ms 37712 KB Output is correct
54 Correct 113 ms 37456 KB Output is correct
55 Correct 10 ms 25436 KB Output is correct
56 Correct 10 ms 25640 KB Output is correct
57 Correct 59 ms 33588 KB Output is correct
58 Correct 32 ms 32196 KB Output is correct
59 Correct 82 ms 38348 KB Output is correct
60 Correct 250 ms 50260 KB Output is correct
61 Correct 114 ms 38896 KB Output is correct
62 Correct 141 ms 38772 KB Output is correct
63 Correct 138 ms 38992 KB Output is correct
64 Correct 264 ms 39876 KB Output is correct
65 Correct 137 ms 38484 KB Output is correct
66 Correct 220 ms 44220 KB Output is correct
67 Correct 70 ms 37564 KB Output is correct
68 Correct 162 ms 38480 KB Output is correct
69 Correct 152 ms 38372 KB Output is correct
70 Correct 143 ms 37968 KB Output is correct