oj.uz

답안 #540469

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
540469 2022-03-20T12:45:22 Z elazarkoren Inside information (BOI21_servers) C++17
60 / 100
 195 ms 44016 KB 
#include <bits/stdc++.h>
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define chkmin(a, b) a = min(a, b)
#define chkmax(a, b) a = max(a, b)
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> pii;
typedef vector<pii> vii;
typedef vector<bool> vb;

const int MAX_N = 3e5;
const int infinity = 1e9;

vii tree[MAX_N];

int depth[MAX_N];
pii dp[20][MAX_N];
int increase[MAX_N], decrease[MAX_N];
int loga[MAX_N];

void Dfs(int node, int parent, int w, int len_i, int len_d, int dist) {
    depth[node] = dist;
    dp[0][node] = {parent, w};
    increase[node] = len_i, decrease[node] = len_d;
    for (auto [neighbor, d] : tree[node]) {
        if (neighbor == parent) continue;
        Dfs(neighbor, node, d, (w > d ? len_i : 0) + 1, (w < d ? len_d : 0) + 1, dist + 1);
    }
}

bool Dfs(int node, int end, int w) {
    if (node == end) return true;
    for (auto [neighbor, d] : tree[node]) {
        if (d >= w) continue;
        if (Dfs(neighbor, end, d)) {
            return true;
        }
    }
    return false;
}

int Dfs(int node, int w) {
    int c = 1;
    for (auto [neighbor, d] : tree[node]) {
        if (d <= w) continue;
        c += Dfs(neighbor, d);
    }
    return c;
}

int n, q;

pii Jump(int a, int k) {
    int max_w = 0;
    for (int i = 0; i <= loga[n]; i++) {
        if ((k >> i) & 1) {
            chkmax(max_w, dp[i][a].y);
            a = dp[i][a].x;
        }
    }
    return {a, max_w};
}

int Solve(int v, int u) {
    if (u == v) return 0;
    int a = v, b = u;
    int max_w = 0;
    if (depth[a] > depth[b]) {
        pii p = Jump(a, depth[a] - depth[b]);
        a = p.x, max_w = p.y;
    } else {
        pii p = Jump(b, depth[b] - depth[a]);
        b = p.x, max_w = p.y;
    }
    bool bad = a != b;
    for (int i = loga[n]; i >= 0; i--) {
        if (dp[i][a].x != dp[i][b].x) {
            chkmax(max_w, dp[i][a].y);
            chkmax(max_w, dp[i][b].y);
            a = dp[i][a].x, b = dp[i][b].x;
        }
    }
    int dep_lca = depth[a] - bad;
    if (bad) {
        chkmax(max_w, dp[0][a].y);
        chkmax(max_w, dp[0][b].y);
    }
    if (dep_lca < depth[v] - decrease[v] || dep_lca < depth[u] - increase[u]) {
        return infinity;
    }
    return (!bad || dp[0][a].y > dp[0][b].y ? max_w : infinity);
}

int cnt[MAX_N][2];
int graph[MAX_N][2];

int Solve(vi &v, int i, int count, int d, int end) {
    int node = v[i];
    if (node == end) {
        return count + cnt[node][0] + cnt[node][1] + 1;
    }
    if (v[i + 1] == 2 * node) {
        if (graph[node][0] == -1) {
            return Solve(v, i + 1, 0, 0, end);
        }
        if (graph[node][0] > d) count = 0;
        count += (graph[node][0] < graph[node][1]) * cnt[node][1];
        count++;
        return Solve(v, i + 1, count, graph[node][0], end);
    }
    if (graph[node][1] == -1) {
        return Solve(v, i + 1, 0, 0, end);
    }
    if (graph[node][1] > d) count = 0;
    count += (graph[node][1] < graph[node][0]) * cnt[node][0];
    count++;
    return Solve(v, i + 1, count, graph[node][1], end);
}

char type[MAX_N];
int a[MAX_N], d[MAX_N], ans[MAX_N];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> q;
    for (int i = 1; i <= n; i++) {
        graph[i][0] = graph[i][1] = -1;
    }
//    for (int i = 1; i <= n; i++) cnt[i] = 1;
    for (int i = 0; i < n + q - 1; i++) {
        cin >> type[i];
        if (type[i] == 'S') {
            int A, b;
            cin >> A >> b;
            tree[A].push_back({b, i});
            tree[b].push_back({A, i});
            int x = max(A, b);
            int y = min(A, b);
            graph[y][x & 1] = i;
            int last = i;
            cnt[y][x & 1]++;
            x >>= 1;
            while (x) {
                int par = x >> 1;
                int next_w = graph[par][x & 1];
                if (next_w == -1 || next_w > last) break;
                cnt[par][x & 1]++;
                x = par, last = next_w;
            }
        } else if (type[i] == 'Q') {
            cin >> a[i] >> d[i];
        } else {
            cin >> d[i];
            vi path;
            int x = d[i];
            while (x) {
                path.push_back(x);
                x >>= 1;
            }
            reverse(all(path));
            ans[i] = Solve(path, 0, 0, 0, d[i]);
        }
    }
    for (int i = 2; i <= n; i++) {
        loga[i] = loga[i >> 1] + 1;
    }
    Dfs(1, 0, 0, 0, 0, 0);
    for (int i = 1; i <= loga[n]; i++) {
        for (int j = 1; j <= n; j++) {
            dp[i][j].x = dp[i - 1][dp[i - 1][j].x].x;
            dp[i][j].y = max(dp[i - 1][j].y, dp[i - 1][dp[i - 1][j].x].y);
        }
    }
    for (int i = 0; i < n + q - 1; i++) {
        if (type[i] == 'Q') {
            ans[i] = Solve(a[i], d[i]) <= i;
        }
    }
    for (int i = 0; i < n + q - 1; i++) {
        if (type[i] == 'Q') {
            cout << (ans[i] ? "yes\n" : "no\n");
        } else if (type[i] == 'C') {
            cout << ans[i] << '\n';
        }
    }
    return 0;
}
//5 7
//S 1 2
//S 1 3
//S 2 4
//C 1
//C 4
//S 2 5
//C 1
//C 2
//C 3
//C 4
//C 5

//5 5
//S 2 4
//S 1 3
//S 1 2
//S 2 5
//C 1
//C 2
//C 3
//C 4
//C 5

Subtask #1
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 9300 KB Output is correct
2 Correct 39 ms 10000 KB Output is correct
3 Correct 31 ms 10068 KB Output is correct
4 Correct 42 ms 10144 KB Output is correct
5 Correct 40 ms 10380 KB Output is correct
6 Correct 34 ms 10024 KB Output is correct

Subtask #2
0 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 9300 KB Output is correct
2 Correct 39 ms 10000 KB Output is correct
3 Correct 31 ms 10068 KB Output is correct
4 Correct 42 ms 10144 KB Output is correct
5 Correct 40 ms 10380 KB Output is correct
6 Correct 34 ms 10024 KB Output is correct
7 Incorrect 30 ms 9300 KB Extra information in the output file
8 Halted 0 ms 0 KB -

Subtask #3
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 9352 KB Output is correct
2 Correct 123 ms 34440 KB Output is correct
3 Correct 132 ms 34388 KB Output is correct

Subtask #4
0 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 9352 KB Output is correct
2 Correct 123 ms 34440 KB Output is correct
3 Correct 132 ms 34388 KB Output is correct
4 Incorrect 25 ms 9388 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #5
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 9312 KB Output is correct
2 Correct 147 ms 43808 KB Output is correct
3 Correct 128 ms 43852 KB Output is correct
4 Correct 131 ms 43804 KB Output is correct

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 9312 KB Output is correct
2 Correct 147 ms 43808 KB Output is correct
3 Correct 128 ms 43852 KB Output is correct
4 Correct 131 ms 43804 KB Output is correct
5 Incorrect 26 ms 9300 KB Extra information in the output file
6 Halted 0 ms 0 KB -

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 9332 KB Output is correct
2 Correct 114 ms 34904 KB Output is correct
3 Correct 117 ms 34636 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 9332 KB Output is correct
2 Correct 114 ms 34904 KB Output is correct
3 Correct 117 ms 34636 KB Output is correct
4 Correct 27 ms 9292 KB Output is correct
5 Correct 119 ms 36564 KB Output is correct
6 Correct 143 ms 37472 KB Output is correct

Subtask #9
12.5 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 9292 KB Output is correct
2 Correct 126 ms 43788 KB Output is correct
3 Correct 138 ms 43836 KB Output is correct
4 Correct 136 ms 44016 KB Output is correct
5 Correct 25 ms 9392 KB Output is correct
6 Correct 112 ms 34812 KB Output is correct
7 Correct 122 ms 34700 KB Output is correct
8 Correct 155 ms 36152 KB Output is correct
9 Correct 132 ms 35532 KB Output is correct
10 Correct 133 ms 40712 KB Output is correct
11 Correct 185 ms 39956 KB Output is correct

Subtask #10
0 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 9292 KB Output is correct
2 Correct 126 ms 43788 KB Output is correct
3 Correct 138 ms 43836 KB Output is correct
4 Correct 136 ms 44016 KB Output is correct
5 Correct 25 ms 9392 KB Output is correct
6 Correct 112 ms 34812 KB Output is correct
7 Correct 122 ms 34700 KB Output is correct
8 Correct 155 ms 36152 KB Output is correct
9 Correct 132 ms 35532 KB Output is correct
10 Correct 133 ms 40712 KB Output is correct
11 Correct 185 ms 39956 KB Output is correct
12 Incorrect 25 ms 9248 KB Extra information in the output file
13 Halted 0 ms 0 KB -

Subtask #11
17.5 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 9260 KB Output is correct
2 Correct 36 ms 10008 KB Output is correct
3 Correct 37 ms 10076 KB Output is correct
4 Correct 47 ms 10148 KB Output is correct
5 Correct 38 ms 10316 KB Output is correct
6 Correct 33 ms 10092 KB Output is correct
7 Correct 27 ms 9292 KB Output is correct
8 Correct 121 ms 34396 KB Output is correct
9 Correct 122 ms 34456 KB Output is correct
10 Correct 24 ms 9280 KB Output is correct
11 Correct 124 ms 43856 KB Output is correct
12 Correct 134 ms 43984 KB Output is correct
13 Correct 139 ms 43852 KB Output is correct
14 Correct 24 ms 9320 KB Output is correct
15 Correct 113 ms 34992 KB Output is correct
16 Correct 123 ms 34876 KB Output is correct
17 Correct 153 ms 36236 KB Output is correct
18 Correct 130 ms 35532 KB Output is correct
19 Correct 132 ms 40700 KB Output is correct
20 Correct 195 ms 40092 KB Output is correct
21 Correct 123 ms 35172 KB Output is correct
22 Correct 133 ms 35380 KB Output is correct
23 Correct 131 ms 35280 KB Output is correct
24 Correct 128 ms 35520 KB Output is correct
25 Correct 136 ms 37508 KB Output is correct
26 Correct 115 ms 33972 KB Output is correct
27 Correct 116 ms 33880 KB Output is correct

Subtask #12
0 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 9260 KB Output is correct
2 Correct 36 ms 10008 KB Output is correct
3 Correct 37 ms 10076 KB Output is correct
4 Correct 47 ms 10148 KB Output is correct
5 Correct 38 ms 10316 KB Output is correct
6 Correct 33 ms 10092 KB Output is correct
7 Correct 27 ms 9292 KB Output is correct
8 Correct 121 ms 34396 KB Output is correct
9 Correct 122 ms 34456 KB Output is correct
10 Correct 24 ms 9280 KB Output is correct
11 Correct 124 ms 43856 KB Output is correct
12 Correct 134 ms 43984 KB Output is correct
13 Correct 139 ms 43852 KB Output is correct
14 Correct 24 ms 9320 KB Output is correct
15 Correct 113 ms 34992 KB Output is correct
16 Correct 123 ms 34876 KB Output is correct
17 Correct 153 ms 36236 KB Output is correct
18 Correct 130 ms 35532 KB Output is correct
19 Correct 132 ms 40700 KB Output is correct
20 Correct 195 ms 40092 KB Output is correct
21 Correct 123 ms 35172 KB Output is correct
22 Correct 133 ms 35380 KB Output is correct
23 Correct 131 ms 35280 KB Output is correct
24 Correct 128 ms 35520 KB Output is correct
25 Correct 136 ms 37508 KB Output is correct
26 Correct 115 ms 33972 KB Output is correct
27 Correct 116 ms 33880 KB Output is correct
28 Incorrect 26 ms 9300 KB Extra information in the output file
29 Halted 0 ms 0 KB -