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Submission #1040692

# Submission time Handle Problem Language Result Execution time Memory
1040692 2024-08-01T08:31:04 Z Plurm Inside information (BOI21_servers) C++11
70 / 100
 3500 ms 232832 KB 
#include <bits/stdc++.h>
using namespace std;

vector<int> g[1 << 19];
vector<int> rg[1 << 19];
int st[1 << 19];
int dep[1 << 19];
int ddep[1 << 19];
int t;
int ett[1048576];
int rev[1048576];
void dfs(int u, int p = 0, int d = 0){
    t++;
    ddep[u] = d;
    ett[t] = dep[u] = dep[p]+1;
    st[u] = t;
    rev[t] = u;
    for(int v : g[u]){
        if(v == p) continue;
        dfs(v, u, d+1);
        t++;
        ett[t] = dep[u];
        rev[t] = u;
    }
    for(int v : rg[u]){
        if(v == p) continue;
        dfs(v, u, d-1);
        t++;
        ett[t] = dep[u];
        rev[t] = u;
    }
}
pair<int, int> sparse[21][1048576];
void build(){
    for(int i = 0; i < 1048576; i++) sparse[0][i] = {ett[i], rev[i]};
    for(int i = 1; i < 21; i++){
        for(int j = 0; j + (1 << i) < 1048576; j++){
            sparse[i][j] = min(sparse[i-1][j], sparse[i-1][j+(1<<(i-1))]);
        }
    }
}
inline bool search(const int& a, const int& d){
    int l, r;
    tie(l, r) = minmax(st[a], st[d]);
    int lg = 31 - __builtin_clz(r-l+1);
    return dep[a] + dep[d] - 2*dep[min(sparse[lg][l], sparse[lg][r-(1<<lg)+1]).second] == ddep[d] - ddep[a];
}
tuple<int,int,int> buffer[1 << 19];
int bsz;
const int THRESH = 1100;
int qs[1 << 19];
int evp[1 << 19];
int update(int u, int p = 0, int d = 0){
    for(int v : rg[u]){
        if(v == p) continue;
        d += update(v, u, 0);
    }
    d += evp[u];
    qs[u] += d;
    for(int v : g[u]){
        if(v == p) continue;
        update(v, u, d);
    }
    return d;
}
int count(int d){
    if(bsz >= THRESH){
        for(int i = 0; i < bsz; i++){
            evp[get<0>(buffer[i])]--;
            evp[get<1>(buffer[i])]--;
            evp[get<2>(buffer[i])] += 2;
        }
        update(1);
        for(int i = 0; i < bsz; i++){
            evp[get<0>(buffer[i])]++;
            evp[get<1>(buffer[i])]++;
            evp[get<2>(buffer[i])] -= 2;
        }
        bsz = 0;
    }
    int ret = qs[d];
    for(int i = 0; i < bsz; i++){
        if(search(get<0>(buffer[i]), d) || search(get<1>(buffer[i]), d)){
            ret++;
        }else if(search(get<2>(buffer[i]), d)){
            ret += 2;
        }
    }
    return ret;
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, k;
    cin >> n >> k;
    k += n-1;
    vector<tuple<int,int,int>> cmds;
    vector<int> ids(n+1);
    for(int i = 1; i <= n; i++){
        ids[i] = i;
    }
    int last = n;
    for(int i = 0; i < k; i++){
        string cmd;
        cin >> cmd;
        int a, b, d;
        switch(cmd[0]){
            case 'S':
                cin >> a >> b;
                last++;
                g[last].push_back(ids[a]);
                rg[ids[a]].push_back(last);
                g[last].push_back(ids[b]);
                rg[ids[b]].push_back(last);
                ids[a] = ids[b] = last;
                cmds.push_back({0, a, b});
                break;
            case 'Q':
                cin >> a >> d;
                cmds.push_back({1, a, d});
                break;
            case 'C':
                cin >> d;
                cmds.push_back({2, d, 0});
                break;
        }
    }
    dfs(1);
    build();
    for(int i = 1; i <= n; i++){
        ids[i] = i;
        qs[i]++;
    }
    last = n;
    for(int i = 0; i < k; i++){
        int a, b, d;
        switch(get<0>(cmds[i])){
            case 0:
                a = get<1>(cmds[i]);
                b = get<2>(cmds[i]);
                last++;
                buffer[bsz++] = {ids[a], ids[b], last};
                ids[a] = ids[b] = last;
                break;
            case 1:
                a = get<1>(cmds[i]);
                d = get<2>(cmds[i]);
                if(search(ids[a], d)) cout << "yes\n";
                else cout << "no\n";
                break;
            case 2:
                d = get<1>(cmds[i]);
                cout << count(d) << "\n";
                break;
        }
    }
    return 0;
}

Subtask #1
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 53 ms 199084 KB Output is correct
2 Correct 88 ms 199548 KB Output is correct
3 Correct 66 ms 199632 KB Output is correct
4 Correct 64 ms 199620 KB Output is correct
5 Correct 81 ms 199984 KB Output is correct
6 Correct 64 ms 199888 KB Output is correct

Subtask #2
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 53 ms 199084 KB Output is correct
2 Correct 88 ms 199548 KB Output is correct
3 Correct 66 ms 199632 KB Output is correct
4 Correct 64 ms 199620 KB Output is correct
5 Correct 81 ms 199984 KB Output is correct
6 Correct 64 ms 199888 KB Output is correct
7 Correct 70 ms 199072 KB Output is correct
8 Correct 757 ms 199648 KB Output is correct
9 Correct 512 ms 199684 KB Output is correct
10 Correct 689 ms 199644 KB Output is correct
11 Correct 731 ms 199820 KB Output is correct
12 Correct 312 ms 199936 KB Output is correct

Subtask #3
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 57 ms 199108 KB Output is correct
2 Correct 130 ms 232832 KB Output is correct
3 Correct 118 ms 232700 KB Output is correct

Subtask #4
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 57 ms 199108 KB Output is correct
2 Correct 130 ms 232832 KB Output is correct
3 Correct 118 ms 232700 KB Output is correct
4 Correct 58 ms 199108 KB Output is correct
5 Correct 779 ms 230884 KB Output is correct
6 Correct 1042 ms 231120 KB Output is correct
7 Correct 1312 ms 230888 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 199156 KB Output is correct
2 Correct 151 ms 231684 KB Output is correct
3 Correct 144 ms 231608 KB Output is correct
4 Correct 106 ms 232644 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 199156 KB Output is correct
2 Correct 151 ms 231684 KB Output is correct
3 Correct 144 ms 231608 KB Output is correct
4 Correct 106 ms 232644 KB Output is correct
5 Correct 80 ms 199052 KB Output is correct
6 Correct 3142 ms 229488 KB Output is correct
7 Correct 667 ms 230776 KB Output is correct
8 Correct 3324 ms 229424 KB Output is correct
9 Correct 3321 ms 229408 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 199108 KB Output is correct
2 Correct 111 ms 220928 KB Output is correct
3 Correct 124 ms 220416 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 199108 KB Output is correct
2 Correct 111 ms 220928 KB Output is correct
3 Correct 124 ms 220416 KB Output is correct
4 Correct 57 ms 199108 KB Output is correct
5 Correct 833 ms 219104 KB Output is correct
6 Correct 1655 ms 220680 KB Output is correct

Subtask #9
12.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 58 ms 199112 KB Output is correct
2 Correct 140 ms 231472 KB Output is correct
3 Correct 132 ms 231428 KB Output is correct
4 Correct 104 ms 232756 KB Output is correct
5 Correct 50 ms 199092 KB Output is correct
6 Correct 103 ms 220928 KB Output is correct
7 Correct 127 ms 220568 KB Output is correct
8 Correct 130 ms 220924 KB Output is correct
9 Correct 130 ms 220924 KB Output is correct
10 Correct 117 ms 225532 KB Output is correct
11 Correct 114 ms 224768 KB Output is correct

Subtask #10
0 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 58 ms 199112 KB Output is correct
2 Correct 140 ms 231472 KB Output is correct
3 Correct 132 ms 231428 KB Output is correct
4 Correct 104 ms 232756 KB Output is correct
5 Correct 50 ms 199092 KB Output is correct
6 Correct 103 ms 220928 KB Output is correct
7 Correct 127 ms 220568 KB Output is correct
8 Correct 130 ms 220924 KB Output is correct
9 Correct 130 ms 220924 KB Output is correct
10 Correct 117 ms 225532 KB Output is correct
11 Correct 114 ms 224768 KB Output is correct
12 Correct 53 ms 199160 KB Output is correct
13 Correct 3046 ms 229544 KB Output is correct
14 Correct 695 ms 231016 KB Output is correct
15 Execution timed out 3588 ms 229468 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #11
17.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 51 ms 199108 KB Output is correct
2 Correct 61 ms 199380 KB Output is correct
3 Correct 71 ms 199684 KB Output is correct
4 Correct 61 ms 199636 KB Output is correct
5 Correct 67 ms 199852 KB Output is correct
6 Correct 64 ms 199812 KB Output is correct
7 Correct 59 ms 199068 KB Output is correct
8 Correct 120 ms 232748 KB Output is correct
9 Correct 123 ms 232716 KB Output is correct
10 Correct 58 ms 199116 KB Output is correct
11 Correct 154 ms 231424 KB Output is correct
12 Correct 157 ms 231632 KB Output is correct
13 Correct 116 ms 232832 KB Output is correct
14 Correct 62 ms 199212 KB Output is correct
15 Correct 120 ms 221148 KB Output is correct
16 Correct 134 ms 220624 KB Output is correct
17 Correct 155 ms 220936 KB Output is correct
18 Correct 153 ms 220932 KB Output is correct
19 Correct 135 ms 225540 KB Output is correct
20 Correct 146 ms 224936 KB Output is correct
21 Correct 131 ms 225364 KB Output is correct
22 Correct 144 ms 225560 KB Output is correct
23 Correct 161 ms 221864 KB Output is correct
24 Correct 177 ms 222000 KB Output is correct
25 Correct 143 ms 227412 KB Output is correct
26 Correct 142 ms 221184 KB Output is correct
27 Correct 138 ms 221592 KB Output is correct

Subtask #12
0 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 51 ms 199108 KB Output is correct
2 Correct 61 ms 199380 KB Output is correct
3 Correct 71 ms 199684 KB Output is correct
4 Correct 61 ms 199636 KB Output is correct
5 Correct 67 ms 199852 KB Output is correct
6 Correct 64 ms 199812 KB Output is correct
7 Correct 59 ms 199068 KB Output is correct
8 Correct 120 ms 232748 KB Output is correct
9 Correct 123 ms 232716 KB Output is correct
10 Correct 58 ms 199116 KB Output is correct
11 Correct 154 ms 231424 KB Output is correct
12 Correct 157 ms 231632 KB Output is correct
13 Correct 116 ms 232832 KB Output is correct
14 Correct 62 ms 199212 KB Output is correct
15 Correct 120 ms 221148 KB Output is correct
16 Correct 134 ms 220624 KB Output is correct
17 Correct 155 ms 220936 KB Output is correct
18 Correct 153 ms 220932 KB Output is correct
19 Correct 135 ms 225540 KB Output is correct
20 Correct 146 ms 224936 KB Output is correct
21 Correct 131 ms 225364 KB Output is correct
22 Correct 144 ms 225560 KB Output is correct
23 Correct 161 ms 221864 KB Output is correct
24 Correct 177 ms 222000 KB Output is correct
25 Correct 143 ms 227412 KB Output is correct
26 Correct 142 ms 221184 KB Output is correct
27 Correct 138 ms 221592 KB Output is correct
28 Correct 59 ms 199200 KB Output is correct
29 Correct 763 ms 199452 KB Output is correct
30 Correct 458 ms 199636 KB Output is correct
31 Correct 723 ms 199648 KB Output is correct
32 Correct 741 ms 199824 KB Output is correct
33 Correct 343 ms 199992 KB Output is correct
34 Correct 60 ms 199096 KB Output is correct
35 Correct 908 ms 230824 KB Output is correct
36 Correct 1110 ms 231176 KB Output is correct
37 Correct 1245 ms 231052 KB Output is correct
38 Correct 57 ms 199136 KB Output is correct
39 Correct 3408 ms 229608 KB Output is correct
40 Correct 684 ms 230864 KB Output is correct
41 Execution timed out 3589 ms 229512 KB Time limit exceeded
42 Halted 0 ms 0 KB -