oj.uz

답안 #793834

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
793834 2023-07-26T07:08:26 Z vjudge1 Tourism (JOI23_tourism) C++14
17 / 100
 220 ms 46388 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
#define ll long long
using namespace std ;
const int N = (1 << 17) ;
bool flag1, flag2, us[N + 1] ;
int n, m, q, c[N + 1], l[N + 1], r[N + 1], p[N + 1], dist[N + 1], ind[N + 1], pw[2 * N + 1] ;
vector<int> v[N + 1] ;
vector<pair<int, int>> tree ;
int mx[N + 1][20], mn1[N + 1][20] ;
pair<int, int> mn[2 * N + 1][20] ;
//ниже всё для hld
vector<int> hld ;
int kol[N + 1], index1[N + 1], tp[N + 1], bst[N + 1], sum[2 * N + 1], psh[2 * N + 1] ;
void first_dfs(int city, int last)
{
    int now = 0 ;
    kol[city]++ ;
    for(int i : v[city])
    {
        if(i == last)
            continue ;
        first_dfs(i, city) ;
        kol[city] += kol[i] ;
        if(now < kol[i])
        {
            now = max(now, kol[i]) ;
            bst[city] = i ;
        }
    }
}
void second_dfs(int city, int last, int gay)
{
    tp[city] = gay ;
    index1[city] = hld.size() ;
    hld.push_back(city) ;
    if(bst[city])
        second_dfs(bst[city], city, gay) ;
    for(int i : v[city])
    {
        if(i == last || i == bst[city])
            continue ;
        second_dfs(i, city, hld.size()) ;
    }
}
void push(int l, int r, int v)
{
    if(psh[v] == -1)
        return ;
    int num = psh[v] ;
    psh[v] = -1 ;
    sum[v] = num * (r - l + 1) ;
    if(l == r)
        return ;
    psh[v * 2] = num ;
    psh[v * 2 + 1] = num ;
}
void build()
{
    for(int i = 1 ; i <= 2 * N ; i++)
        psh[i] = -1 ;
}
void update(int l, int r, int l1, int r1, int num, int v)
{
    push(l, r, v) ;
    if(l > r1 || r < l1)
        return ;
    if(l1 <= l && r <= r1)
    {
        psh[v] = num ;
        push(l, r, v) ;
        return ;
    }
    int mid = (l + r) >> 1 ;
    update(l, mid, l1, r1, num, v * 2) ;
    update(mid + 1, r, l1, r1, num, v * 2 + 1) ;
    sum[v] = sum[v * 2] + sum[v * 2 + 1] ;
}
//конец hld
void dfs(int city, int last)
{
    ind[city] = tree.size() ;
    tree.push_back({dist[city], city}) ;
    p[city] = last ;
    for(int i : v[city])
    {
        if(i == last)
            continue ;
        dist[i] = dist[city] + 1 ;
        dfs(i, city) ;
        tree.push_back({dist[city], city}) ;
    }
}
void build_lca()
{
    for(int i = 2 ; i <= tree.size() ; i++)
        pw[i] = pw[i / 2] + 1 ;
    for(int i = 0 ; i < tree.size() ; i++)
        mn[i][0] = tree[i] ;
    for(int i = 1 ; i < 20 ; i++)
        for(int j = 0 ; j <= (int)tree.size() - (1 << i) ; j++)
            mn[j][i] = min(mn[j][i - 1], mn[j + (1 << (i - 1))][i - 1]) ;
}
int get_lca(int a, int b)
{
    a = ind[a] ;
    b = ind[b] ;
    if(a > b)
        swap(a, b) ;
    int num = pw[b - a + 1] ;
    return min(mn[a][num], mn[b - (1 << num) + 1][num]).se ;
}
void build_mx_mn()
{
    for(int i = 2 ; i <= m ; i++)
        pw[i] = pw[i / 2] + 1 ;
    for(int i = 1 ; i <= m ; i++)
        mn1[i][0] = c[i], mx[i][0] = c[i] ;
    for(int i = 1 ; i < 20 ; i++)
        for(int j = 1 ; j <= m - (1 << i) + 1 ; j++)
            mn1[j][i] = min(mn1[j][i - 1], mn1[j + (1 << (i - 1))][i - 1]),
            mx[j][i] = max(mx[j][i - 1], mx[j + (1 << (i - 1))][i - 1]) ;
}
pair<int, int> get_mn_mx(int a, int b)
{
    int num = pw[b - a + 1] ;
    return {min(mn1[a][num], mn1[b - (1 << num) + 1][num]), max(mx[a][num], mx[b - (1 << num) + 1][num])} ;
}
signed main()
{
    ios_base::sync_with_stdio( 0 ) ;
    cin.tie( 0 ) ;
    cout.tie( 0 ) ;
    cin >> n >> m >> q ;
    for(int i = 1 ; i < n ; i++)
    {
        int a, b ;
        cin >> a >> b ;
        if(a != i || b != i + 1)flag1 = 1 ;
        v[a].push_back(b) ;
        v[b].push_back(a) ;
    }
    for(int i = 1 ; i <= m ; i++)
        cin >> c[i] ;
    for(int i = 1 ; i <= q ; i++)
        cin >> l[i] >> r[i] ;
    for(int i = 1 ; i < q ; i++)
        if(r[i] + 1 != l[i + 1])
            flag2 = 1 ;
    if(!flag2)
    {
        dfs(1, 0) ;
        build_lca() ;
        first_dfs(1, 0) ;
        second_dfs(1, 0, 0) ;
        build() ;
//        cout << "hld\n" ;
//        for(int i : hld)
//            cout << i << ' ' << tp[i] << '\n' ;
//        cout << "__________________\n" ;
        for(int i = 1 ; i <= q ; i++)
        {
            int lc = c[l[i]] ;
            for(int j = l[i] + 1 ; j <= r[i] ; j++)
                lc = get_lca(lc, c[j]) ;
            for(int j = l[i] ; j <= r[i] ; j++)
            {
                int now = c[j] ;
                while(now != lc)
                    if(index1[lc] < tp[now])
                    {
                        update(0, N - 1, tp[now], index1[now], 1, 1) ;
                        now = p[hld[tp[now]]] ;
                    }
                    else
                    {
                        update(0, N - 1, index1[lc], index1[now], 1, 1) ;
                        now = lc ;
                    }
            }
            cout << sum[1] << '\n' ;
            psh[1] = 0 ;
        }
        return 0 ;
    }
    if(!flag1)
    {
        build_mx_mn() ;
        for(int i = 1 ; i <= q ; i++)
        {
            pair<int, int> p = get_mn_mx(l[i], r[i]) ;
            cout << p.se - p.fi + 1 << '\n' ;
        }
        return 0 ;
    }
    if(n <= 2000 && m <= 2000 && q <= 2000)
    {
        us[0] = 1 ;
        dfs(1, 0) ;
        build_lca() ;
        for(int i = 1 ; i <= q ; i++)
        {
            int ans = 0, lc = c[l[i]] ;
            for(int j = l[i] + 1 ; j <= r[i] ; j++)
                lc = get_lca(lc, c[j]) ;
            for(int j = l[i] ; j <= r[i] ; j++)
            {
                int now = c[j] ;
                while(!us[now])
                {
                    ans++ ;
                    us[now] = 1 ;
                    if(now == lc)
                        break ;
                    now = p[now] ;
                }
            }
            for(int i = 1 ; i <= n ; i++)
                us[i] = 0 ;
            cout << ans << '\n' ;
        }
        return 0 ;
    }
    return 0 ;
}

Compilation message

tourism.cpp: In function 'void build_lca()':
tourism.cpp:97:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |     for(int i = 2 ; i <= tree.size() ; i++)
      |                     ~~^~~~~~~~~~~~~~
tourism.cpp:99:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |     for(int i = 0 ; i < tree.size() ; i++)
      |                     ~~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4448 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 1 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3456 KB Output is correct
8 Correct 2 ms 3540 KB Output is correct
9 Correct 2 ms 3540 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 2 ms 3540 KB Output is correct
12 Correct 3 ms 3540 KB Output is correct
13 Correct 3 ms 3540 KB Output is correct
14 Correct 3 ms 3540 KB Output is correct
15 Correct 2 ms 3540 KB Output is correct
16 Correct 2 ms 3540 KB Output is correct
17 Correct 2 ms 3572 KB Output is correct
18 Correct 2 ms 3540 KB Output is correct
19 Correct 2 ms 3592 KB Output is correct
20 Correct 2 ms 3540 KB Output is correct
21 Correct 2 ms 3540 KB Output is correct
22 Correct 2 ms 3540 KB Output is correct
23 Correct 2 ms 3540 KB Output is correct
24 Correct 2 ms 3540 KB Output is correct
25 Correct 2 ms 3540 KB Output is correct
26 Correct 2 ms 3540 KB Output is correct
27 Correct 2 ms 3412 KB Output is correct
28 Correct 2 ms 3540 KB Output is correct
29 Correct 2 ms 3540 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4448 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 1 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3456 KB Output is correct
8 Correct 2 ms 3540 KB Output is correct
9 Correct 2 ms 3540 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 2 ms 3540 KB Output is correct
12 Correct 3 ms 3540 KB Output is correct
13 Correct 3 ms 3540 KB Output is correct
14 Correct 3 ms 3540 KB Output is correct
15 Correct 2 ms 3540 KB Output is correct
16 Correct 2 ms 3540 KB Output is correct
17 Correct 2 ms 3572 KB Output is correct
18 Correct 2 ms 3540 KB Output is correct
19 Correct 2 ms 3592 KB Output is correct
20 Correct 2 ms 3540 KB Output is correct
21 Correct 2 ms 3540 KB Output is correct
22 Correct 2 ms 3540 KB Output is correct
23 Correct 2 ms 3540 KB Output is correct
24 Correct 2 ms 3540 KB Output is correct
25 Correct 2 ms 3540 KB Output is correct
26 Correct 2 ms 3540 KB Output is correct
27 Correct 2 ms 3412 KB Output is correct
28 Correct 2 ms 3540 KB Output is correct
29 Correct 2 ms 3540 KB Output is correct
30 Correct 15 ms 4068 KB Output is correct
31 Correct 20 ms 4068 KB Output is correct
32 Correct 29 ms 4280 KB Output is correct
33 Correct 28 ms 4304 KB Output is correct
34 Correct 29 ms 4180 KB Output is correct
35 Correct 50 ms 4280 KB Output is correct
36 Correct 55 ms 4180 KB Output is correct
37 Correct 51 ms 4412 KB Output is correct
38 Correct 30 ms 4404 KB Output is correct
39 Correct 39 ms 4408 KB Output is correct
40 Correct 34 ms 4308 KB Output is correct
41 Correct 55 ms 4440 KB Output is correct
42 Correct 65 ms 4436 KB Output is correct
43 Correct 65 ms 4388 KB Output is correct
44 Correct 31 ms 4348 KB Output is correct
45 Correct 28 ms 4332 KB Output is correct
46 Correct 27 ms 4348 KB Output is correct
47 Correct 52 ms 4320 KB Output is correct
48 Correct 58 ms 4312 KB Output is correct
49 Correct 51 ms 4308 KB Output is correct
50 Correct 26 ms 4292 KB Output is correct
51 Correct 28 ms 4280 KB Output is correct
52 Correct 27 ms 4284 KB Output is correct
53 Correct 33 ms 4180 KB Output is correct
54 Correct 26 ms 4180 KB Output is correct
55 Correct 26 ms 4176 KB Output is correct
56 Correct 2 ms 3796 KB Output is correct
57 Correct 3 ms 4180 KB Output is correct
58 Correct 3 ms 4180 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 3 ms 3796 KB Output is correct
4 Correct 61 ms 20732 KB Output is correct
5 Correct 47 ms 16144 KB Output is correct
6 Correct 44 ms 20556 KB Output is correct
7 Correct 86 ms 24328 KB Output is correct
8 Correct 69 ms 24308 KB Output is correct
9 Correct 63 ms 24296 KB Output is correct
10 Correct 64 ms 24420 KB Output is correct
11 Correct 80 ms 24392 KB Output is correct
12 Correct 53 ms 24284 KB Output is correct
13 Correct 72 ms 24332 KB Output is correct
14 Correct 54 ms 24288 KB Output is correct
15 Correct 31 ms 7548 KB Output is correct
16 Correct 58 ms 23920 KB Output is correct
17 Correct 44 ms 20864 KB Output is correct

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4436 KB Output is correct
2 Correct 104 ms 27248 KB Output is correct
3 Correct 149 ms 29236 KB Output is correct
4 Correct 130 ms 32904 KB Output is correct
5 Correct 192 ms 46136 KB Output is correct
6 Correct 212 ms 46172 KB Output is correct
7 Correct 195 ms 46160 KB Output is correct
8 Correct 199 ms 46204 KB Output is correct
9 Correct 204 ms 46176 KB Output is correct
10 Correct 209 ms 46236 KB Output is correct
11 Correct 207 ms 46148 KB Output is correct
12 Correct 211 ms 46276 KB Output is correct
13 Incorrect 220 ms 46388 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4436 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3796 KB Output is correct
4 Incorrect 27 ms 6228 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4448 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 1 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3456 KB Output is correct
8 Correct 2 ms 3540 KB Output is correct
9 Correct 2 ms 3540 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 2 ms 3540 KB Output is correct
12 Correct 3 ms 3540 KB Output is correct
13 Correct 3 ms 3540 KB Output is correct
14 Correct 3 ms 3540 KB Output is correct
15 Correct 2 ms 3540 KB Output is correct
16 Correct 2 ms 3540 KB Output is correct
17 Correct 2 ms 3572 KB Output is correct
18 Correct 2 ms 3540 KB Output is correct
19 Correct 2 ms 3592 KB Output is correct
20 Correct 2 ms 3540 KB Output is correct
21 Correct 2 ms 3540 KB Output is correct
22 Correct 2 ms 3540 KB Output is correct
23 Correct 2 ms 3540 KB Output is correct
24 Correct 2 ms 3540 KB Output is correct
25 Correct 2 ms 3540 KB Output is correct
26 Correct 2 ms 3540 KB Output is correct
27 Correct 2 ms 3412 KB Output is correct
28 Correct 2 ms 3540 KB Output is correct
29 Correct 2 ms 3540 KB Output is correct
30 Correct 15 ms 4068 KB Output is correct
31 Correct 20 ms 4068 KB Output is correct
32 Correct 29 ms 4280 KB Output is correct
33 Correct 28 ms 4304 KB Output is correct
34 Correct 29 ms 4180 KB Output is correct
35 Correct 50 ms 4280 KB Output is correct
36 Correct 55 ms 4180 KB Output is correct
37 Correct 51 ms 4412 KB Output is correct
38 Correct 30 ms 4404 KB Output is correct
39 Correct 39 ms 4408 KB Output is correct
40 Correct 34 ms 4308 KB Output is correct
41 Correct 55 ms 4440 KB Output is correct
42 Correct 65 ms 4436 KB Output is correct
43 Correct 65 ms 4388 KB Output is correct
44 Correct 31 ms 4348 KB Output is correct
45 Correct 28 ms 4332 KB Output is correct
46 Correct 27 ms 4348 KB Output is correct
47 Correct 52 ms 4320 KB Output is correct
48 Correct 58 ms 4312 KB Output is correct
49 Correct 51 ms 4308 KB Output is correct
50 Correct 26 ms 4292 KB Output is correct
51 Correct 28 ms 4280 KB Output is correct
52 Correct 27 ms 4284 KB Output is correct
53 Correct 33 ms 4180 KB Output is correct
54 Correct 26 ms 4180 KB Output is correct
55 Correct 26 ms 4176 KB Output is correct
56 Correct 2 ms 3796 KB Output is correct
57 Correct 3 ms 4180 KB Output is correct
58 Correct 3 ms 4180 KB Output is correct
59 Correct 2 ms 3412 KB Output is correct
60 Correct 2 ms 3412 KB Output is correct
61 Correct 3 ms 3796 KB Output is correct
62 Correct 61 ms 20732 KB Output is correct
63 Correct 47 ms 16144 KB Output is correct
64 Correct 44 ms 20556 KB Output is correct
65 Correct 86 ms 24328 KB Output is correct
66 Correct 69 ms 24308 KB Output is correct
67 Correct 63 ms 24296 KB Output is correct
68 Correct 64 ms 24420 KB Output is correct
69 Correct 80 ms 24392 KB Output is correct
70 Correct 53 ms 24284 KB Output is correct
71 Correct 72 ms 24332 KB Output is correct
72 Correct 54 ms 24288 KB Output is correct
73 Correct 31 ms 7548 KB Output is correct
74 Correct 58 ms 23920 KB Output is correct
75 Correct 44 ms 20864 KB Output is correct
76 Correct 2 ms 4436 KB Output is correct
77 Correct 104 ms 27248 KB Output is correct
78 Correct 149 ms 29236 KB Output is correct
79 Correct 130 ms 32904 KB Output is correct
80 Correct 192 ms 46136 KB Output is correct
81 Correct 212 ms 46172 KB Output is correct
82 Correct 195 ms 46160 KB Output is correct
83 Correct 199 ms 46204 KB Output is correct
84 Correct 204 ms 46176 KB Output is correct
85 Correct 209 ms 46236 KB Output is correct
86 Correct 207 ms 46148 KB Output is correct
87 Correct 211 ms 46276 KB Output is correct
88 Incorrect 220 ms 46388 KB Output isn't correct
89 Halted 0 ms 0 KB -