Submission #1039592

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039592		Plurm	Inside information (BOI21_servers)	C++11	5 / 100	3577 ms	43924 KiB

servers

#include <bits/stdc++.h>
using namespace std;

vector<int> g[500005];
vector<int> rg[500005];
int cnt[500005];
bool search(int a, int d){
    if(a == d) return true;
    for(int v : g[a]) if(search(v, d)) return true;
    return false;
}
int count(int d){
    int ret = cnt[d];
    for(int v : rg[d]) ret += count(v);
    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]);
                g[last].push_back(ids[b]);
                rg[ids[a]].push_back(last);
                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;
        }
    }
    for(int i = 1; i <= n; i++){
        ids[i] = i;
        cnt[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]);
                cnt[ids[a]]--;
                cnt[ids[b]]--;
                last++;
                ids[a] = ids[b] = last;
                cnt[last] += 2;
                break;
            case 1:
                a = get<1>(cmds[i]);
                d = get<2>(cmds[i]);
                if(search(ids[a], d)) cout << "yes" << endl;
                else cout << "no" << endl;
                break;
            case 2:
                d = get<1>(cmds[i]);
                cout << count(d) << endl;
                break;
        }
    }
    return 0;
}

• Subtask 1: 2.5 / 2.5
• Subtask 2: 2.5 / 2.5
• Subtask 3: 0 / 2.5
• Subtask 4: 0 / 2.5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 12.5
• Subtask 10: 0 / 12.5
• Subtask 11: 0 / 17.5
• Subtask 12: 0 / 17.5