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답안 #1031296

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1031296 2024-07-22T17:02:00 Z underwaterkillerwhale Construction of Highway (JOI18_construction) C++17
100 / 100
 162 ms 20352 KB 
#include <bits/stdc++.h>
#define se              second
#define fs              first
#define mp              make_pair
#define pb              push_back
#define ll              long long
#define ii              pair<ll,ll>
#define ld              long double
#define SZ(v)           (int)v.size()
#define ALL(v)          v.begin(), v.end()
#define bit(msk, i)     ((msk >> i) & 1)
#define iter(id, v)     for(auto id : v)
#define rep(i,m,n)      for(int i=(m); i<=(n); i++)
#define reb(i,m,n)      for(int i=(m); i>=(n); i--)
using namespace std;

mt19937_64 rd(chrono :: steady_clock :: now().time_since_epoch().count());
ll Rand(ll l, ll r) { return uniform_int_distribution<ll> (l, r)(rd); }

const int N = 1e5 + 7;
const int Mod = 1e9 + 7;
const int szBL = 320;
const ll INF = 1e9 + 160907;
const int BASE = 137;

int n, m;
int a[N];
vector<int> ke[N];
vector<pair<int,int>> vec[N];
pair<int,int> qr[N];

struct fenwick_Tree {
    int m;
    int fen[N];
    void init (int n) {
        m = n;
        rep (i, 1, m) fen[i] = 0;
    }
    void update (int pos, int val) {
        for (; pos <= m; pos += pos & -pos) fen[pos] += val;
    }
    int get (int pos) {
        int res = 0;
        for (;pos > 0; pos -= pos & -pos) res += fen[pos];
        return res;
    }
}fen;

int cid[N], Head[N], par[N], high[N], nChild[N], numC = 1, in[N];

void pdfs (int u, int p) {
    par[u] = p;
    nChild[u] = 1;
    high[u] = high[p] + 1;
    iter (&v, ke[u]) if (v != p){
        pdfs(v, u);
        nChild[u] += nChild[v];
    }
}

void hld (int u, int p) {
    static int time_dfs = 0;
    if (numC != cid[p]) Head[u] = u;
    else Head[u] = Head[p];
    in[u] = ++time_dfs;
    cid[u] = numC;
    int mxV = -1;
//    cout << u <<" "<<cid[u] <<" "<<Head[u]<<"\n";
    iter (&v, ke[u]) {
        if (v != p && (v == -1 || nChild[v] > nChild[mxV])) {
            mxV = v;
        }
    }
    if (mxV != -1) hld (mxV, u);
    iter (&v, ke[u]) {
        if (v == p || v == mxV) continue;
        ++numC;
        hld(v, u);
    }
}

ll update (int u, int col) {
//    cout << u <<" "<<col<<": \n";
    static vector<pair<int,int>> chains; chains.clear();
    for (; u != 0; u = par[Head[u]]) chains.push_back({cid[u], high[u] - high[Head[u]] + 1});
    reverse(ALL(chains));
    static vector<pair<int,int>> del; del.clear();
    static vector<int> vals; vals.clear();
    iter (&ch, chains) {
        vector<pair<int,int>> &cur = vec[ch.fs];
        int X = ch.se;
        int pre = 0;
        while (!cur.empty()) {
            pair<int,int> &u = cur.back();
            if (pre + u.se > X) {
                u.se = u.se - (X - pre);
                vals.push_back(u.fs);
                del.push_back({u.fs, X - pre});
                break;
            }
            else {
                del.push_back(u);
                vals.push_back(u.fs);
                pre += u.se;
                cur.pop_back();
            }
        }
        cur.push_back({col, X});
    }
//    iter (&id, del) cout << id.fs<<","<<id.se << " ";
//    cout<<"\n";
//    iter (&id, vec[1]) cout << id.fs<<","<<id.se<<" "; cout <<"\n";
    int ntot;
    sort (ALL(vals));
    vals.resize(ntot = unique(ALL(vals)) - vals.begin());
    fen.init(ntot);
    ll res = 0;
    iter (&cur, del) {
        int pos = lower_bound(ALL(vals), cur.fs) - vals.begin() + 1;
        res += 1LL * (fen.get(ntot) - fen.get(pos)) * cur.se;
        fen.update(pos, cur.se);
    }
    return res;
}

void solution () {
    cin >> n;
    rep (i, 1, n) cin >> a[i];
    rep (i, 1, n - 1) {
        int u, v;
        cin >> u >> v;
        qr[i] = {u, v};
        ke[u].push_back(v);
        ke[v].push_back(u);
    }
    pdfs(1, 0);
    hld(1, 0);
    vec[1].push_back({a[1], 1});
    rep (i, 1, n - 1) {
        int u, v;
        tie(u, v) = qr[i];
        cout << update (v, a[v]) <<"\n";
    }
}

#define file(name) freopen(name".inp", "r", stdin); \
freopen(name".out", "w", stdout);

int main () {
//    file("c");
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    ll num_Test = 1;
//    cin >> num_Test;
    while(num_Test--)
        solution();
}
/*
nếu mình nghĩ sẽ thay đổi định nghĩa, kiểu dữ liệu của hàm hay mảng j thì mình phải nghĩ xem nó sẽ ảnh hưởng đến các phần nào
nghĩ xem mình có thể làm gì, có khả năng làm những gì với giới hạn bài toán, đặc điểm bài toans
nếu struggle, xem lại các dữ liệu bài toán xem mình đang xét trường hợp này có phù hợp với các dữ liệu bài toán cung cấp không ?
1
7 3
0010010
110

1
10 4
00xx000xx0x
  11   11 1
1101
L        R
    L         R
*/

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 5212 KB Output is correct
5 Correct 2 ms 5172 KB Output is correct
6 Correct 3 ms 5212 KB Output is correct
7 Correct 3 ms 5212 KB Output is correct
8 Correct 3 ms 5212 KB Output is correct
9 Correct 3 ms 5212 KB Output is correct
10 Correct 2 ms 5176 KB Output is correct
11 Correct 3 ms 5212 KB Output is correct
12 Correct 2 ms 5212 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 2 ms 5116 KB Output is correct
15 Correct 3 ms 5212 KB Output is correct
16 Correct 3 ms 5212 KB Output is correct
17 Correct 2 ms 5212 KB Output is correct
18 Correct 3 ms 5212 KB Output is correct
19 Correct 2 ms 5212 KB Output is correct
20 Correct 3 ms 5180 KB Output is correct
21 Correct 2 ms 5256 KB Output is correct
22 Correct 3 ms 5212 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 2 ms 5212 KB Output is correct
25 Correct 2 ms 5212 KB Output is correct
26 Correct 4 ms 5212 KB Output is correct
27 Correct 4 ms 5212 KB Output is correct
28 Correct 2 ms 5176 KB Output is correct
29 Correct 3 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 3 ms 5212 KB Output is correct
32 Correct 2 ms 5212 KB Output is correct
33 Correct 2 ms 5212 KB Output is correct
34 Correct 2 ms 5212 KB Output is correct
35 Correct 2 ms 5212 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 3 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 3 ms 5212 KB Output is correct
40 Correct 4 ms 5212 KB Output is correct
41 Correct 2 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 2 ms 5212 KB Output is correct
44 Correct 2 ms 5212 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 5212 KB Output is correct
5 Correct 2 ms 5172 KB Output is correct
6 Correct 3 ms 5212 KB Output is correct
7 Correct 3 ms 5212 KB Output is correct
8 Correct 3 ms 5212 KB Output is correct
9 Correct 3 ms 5212 KB Output is correct
10 Correct 2 ms 5176 KB Output is correct
11 Correct 3 ms 5212 KB Output is correct
12 Correct 2 ms 5212 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 2 ms 5116 KB Output is correct
15 Correct 3 ms 5212 KB Output is correct
16 Correct 3 ms 5212 KB Output is correct
17 Correct 2 ms 5212 KB Output is correct
18 Correct 3 ms 5212 KB Output is correct
19 Correct 2 ms 5212 KB Output is correct
20 Correct 3 ms 5180 KB Output is correct
21 Correct 2 ms 5256 KB Output is correct
22 Correct 3 ms 5212 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 2 ms 5212 KB Output is correct
25 Correct 2 ms 5212 KB Output is correct
26 Correct 4 ms 5212 KB Output is correct
27 Correct 4 ms 5212 KB Output is correct
28 Correct 2 ms 5176 KB Output is correct
29 Correct 3 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 3 ms 5212 KB Output is correct
32 Correct 2 ms 5212 KB Output is correct
33 Correct 2 ms 5212 KB Output is correct
34 Correct 2 ms 5212 KB Output is correct
35 Correct 2 ms 5212 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 3 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 3 ms 5212 KB Output is correct
40 Correct 4 ms 5212 KB Output is correct
41 Correct 2 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 2 ms 5212 KB Output is correct
44 Correct 2 ms 5212 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 7 ms 5468 KB Output is correct
47 Correct 5 ms 5468 KB Output is correct
48 Correct 6 ms 5468 KB Output is correct
49 Correct 4 ms 5756 KB Output is correct
50 Correct 4 ms 5724 KB Output is correct
51 Correct 4 ms 5724 KB Output is correct
52 Correct 5 ms 5752 KB Output is correct
53 Correct 6 ms 5728 KB Output is correct
54 Correct 6 ms 5692 KB Output is correct
55 Correct 4 ms 5724 KB Output is correct
56 Correct 3 ms 5724 KB Output is correct
57 Correct 4 ms 5496 KB Output is correct
58 Correct 5 ms 5468 KB Output is correct
59 Correct 5 ms 5468 KB Output is correct
60 Correct 6 ms 5508 KB Output is correct
61 Correct 4 ms 5724 KB Output is correct
62 Correct 4 ms 5724 KB Output is correct
63 Correct 4 ms 5724 KB Output is correct
64 Correct 4 ms 5440 KB Output is correct
65 Correct 7 ms 5468 KB Output is correct
66 Correct 5 ms 5440 KB Output is correct
67 Correct 5 ms 5556 KB Output is correct
68 Correct 5 ms 5520 KB Output is correct
69 Correct 4 ms 5724 KB Output is correct
70 Correct 5 ms 5692 KB Output is correct
71 Correct 3 ms 5468 KB Output is correct
72 Correct 4 ms 5440 KB Output is correct
73 Correct 6 ms 5540 KB Output is correct
74 Correct 4 ms 5468 KB Output is correct
75 Correct 6 ms 5580 KB Output is correct
76 Correct 4 ms 5468 KB Output is correct
77 Correct 4 ms 5468 KB Output is correct
78 Correct 3 ms 5604 KB Output is correct
79 Correct 4 ms 5416 KB Output is correct
80 Correct 4 ms 5468 KB Output is correct
81 Correct 4 ms 5436 KB Output is correct
82 Correct 5 ms 5496 KB Output is correct
83 Correct 4 ms 5468 KB Output is correct
84 Correct 4 ms 5516 KB Output is correct
85 Correct 4 ms 5468 KB Output is correct
86 Correct 4 ms 5468 KB Output is correct

Subtask #3
84.0 / 84.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 5212 KB Output is correct
5 Correct 2 ms 5172 KB Output is correct
6 Correct 3 ms 5212 KB Output is correct
7 Correct 3 ms 5212 KB Output is correct
8 Correct 3 ms 5212 KB Output is correct
9 Correct 3 ms 5212 KB Output is correct
10 Correct 2 ms 5176 KB Output is correct
11 Correct 3 ms 5212 KB Output is correct
12 Correct 2 ms 5212 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 2 ms 5116 KB Output is correct
15 Correct 3 ms 5212 KB Output is correct
16 Correct 3 ms 5212 KB Output is correct
17 Correct 2 ms 5212 KB Output is correct
18 Correct 3 ms 5212 KB Output is correct
19 Correct 2 ms 5212 KB Output is correct
20 Correct 3 ms 5180 KB Output is correct
21 Correct 2 ms 5256 KB Output is correct
22 Correct 3 ms 5212 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 2 ms 5212 KB Output is correct
25 Correct 2 ms 5212 KB Output is correct
26 Correct 4 ms 5212 KB Output is correct
27 Correct 4 ms 5212 KB Output is correct
28 Correct 2 ms 5176 KB Output is correct
29 Correct 3 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 3 ms 5212 KB Output is correct
32 Correct 2 ms 5212 KB Output is correct
33 Correct 2 ms 5212 KB Output is correct
34 Correct 2 ms 5212 KB Output is correct
35 Correct 2 ms 5212 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 3 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 3 ms 5212 KB Output is correct
40 Correct 4 ms 5212 KB Output is correct
41 Correct 2 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 2 ms 5212 KB Output is correct
44 Correct 2 ms 5212 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 7 ms 5468 KB Output is correct
47 Correct 5 ms 5468 KB Output is correct
48 Correct 6 ms 5468 KB Output is correct
49 Correct 4 ms 5756 KB Output is correct
50 Correct 4 ms 5724 KB Output is correct
51 Correct 4 ms 5724 KB Output is correct
52 Correct 5 ms 5752 KB Output is correct
53 Correct 6 ms 5728 KB Output is correct
54 Correct 6 ms 5692 KB Output is correct
55 Correct 4 ms 5724 KB Output is correct
56 Correct 3 ms 5724 KB Output is correct
57 Correct 4 ms 5496 KB Output is correct
58 Correct 5 ms 5468 KB Output is correct
59 Correct 5 ms 5468 KB Output is correct
60 Correct 6 ms 5508 KB Output is correct
61 Correct 4 ms 5724 KB Output is correct
62 Correct 4 ms 5724 KB Output is correct
63 Correct 4 ms 5724 KB Output is correct
64 Correct 4 ms 5440 KB Output is correct
65 Correct 7 ms 5468 KB Output is correct
66 Correct 5 ms 5440 KB Output is correct
67 Correct 5 ms 5556 KB Output is correct
68 Correct 5 ms 5520 KB Output is correct
69 Correct 4 ms 5724 KB Output is correct
70 Correct 5 ms 5692 KB Output is correct
71 Correct 3 ms 5468 KB Output is correct
72 Correct 4 ms 5440 KB Output is correct
73 Correct 6 ms 5540 KB Output is correct
74 Correct 4 ms 5468 KB Output is correct
75 Correct 6 ms 5580 KB Output is correct
76 Correct 4 ms 5468 KB Output is correct
77 Correct 4 ms 5468 KB Output is correct
78 Correct 3 ms 5604 KB Output is correct
79 Correct 4 ms 5416 KB Output is correct
80 Correct 4 ms 5468 KB Output is correct
81 Correct 4 ms 5436 KB Output is correct
82 Correct 5 ms 5496 KB Output is correct
83 Correct 4 ms 5468 KB Output is correct
84 Correct 4 ms 5516 KB Output is correct
85 Correct 4 ms 5468 KB Output is correct
86 Correct 4 ms 5468 KB Output is correct
87 Correct 11 ms 6236 KB Output is correct
88 Correct 30 ms 8416 KB Output is correct
89 Correct 125 ms 15872 KB Output is correct
90 Correct 103 ms 15940 KB Output is correct
91 Correct 111 ms 15956 KB Output is correct
92 Correct 74 ms 20352 KB Output is correct
93 Correct 50 ms 20220 KB Output is correct
94 Correct 48 ms 20308 KB Output is correct
95 Correct 53 ms 19916 KB Output is correct
96 Correct 60 ms 20252 KB Output is correct
97 Correct 64 ms 20172 KB Output is correct
98 Correct 59 ms 20172 KB Output is correct
99 Correct 48 ms 18828 KB Output is correct
100 Correct 132 ms 15176 KB Output is correct
101 Correct 135 ms 15384 KB Output is correct
102 Correct 143 ms 15440 KB Output is correct
103 Correct 140 ms 15384 KB Output is correct
104 Correct 99 ms 18700 KB Output is correct
105 Correct 104 ms 18772 KB Output is correct
106 Correct 72 ms 18812 KB Output is correct
107 Correct 85 ms 15060 KB Output is correct
108 Correct 125 ms 15224 KB Output is correct
109 Correct 102 ms 15392 KB Output is correct
110 Correct 50 ms 19540 KB Output is correct
111 Correct 57 ms 19916 KB Output is correct
112 Correct 78 ms 19612 KB Output is correct
113 Correct 55 ms 18260 KB Output is correct
114 Correct 124 ms 15152 KB Output is correct
115 Correct 162 ms 14776 KB Output is correct
116 Correct 77 ms 18168 KB Output is correct
117 Correct 58 ms 16984 KB Output is correct
118 Correct 61 ms 16352 KB Output is correct
119 Correct 58 ms 16252 KB Output is correct
120 Correct 61 ms 16432 KB Output is correct
121 Correct 52 ms 16204 KB Output is correct
122 Correct 71 ms 15896 KB Output is correct
123 Correct 78 ms 17092 KB Output is correct
124 Correct 78 ms 16444 KB Output is correct
125 Correct 60 ms 16212 KB Output is correct
126 Correct 61 ms 16724 KB Output is correct
127 Correct 84 ms 16180 KB Output is correct
128 Correct 93 ms 15872 KB Output is correct