Submission #446880

#	Time	Username	Problem	Language	Result	Execution time	Memory
446880		wiwiho	Inside information (BOI21_servers)	C++14	10 / 100	354 ms	15452 KiB

servers

#include <bits/stdc++.h>

#define eb emplace_back
#define mp make_pair
#define F first
#define S second
#define iter(a) a.begin(), a.end()
#define lsort(a) sort(iter(a))

using namespace std;

typedef long long ll;

using pii = pair<int, int>;

int n, k;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin >> n >> k; 

    vector<int> tm(n + 2, -1);
    set<int> incr, decr;
    for(int i = 0; i <= n + 1; i++){
        incr.insert(i);
        decr.insert(i);
    }
    int q = n + k - 1;
    for(int i = 0; i < q; i++){

        string s;
        cin >> s;
        int a = -1, d;
        if(s == "S"){
            int u, v;
            cin >> u >> v;
            if(u > v) swap(u, v);
            assert(u + 1 == v);
            tm[u] = i;
            if(tm[u - 1] != -1){
                if(tm[u - 1] < tm[u]) incr.erase(u);
                else decr.erase(u);
            }
            if(tm[v] != -1){
                if(tm[u] < tm[v]) incr.erase(v);
                else decr.erase(v);
            }
            continue;
        }

        if(s == "Q"){
            cin >> a >> d;
        }
        else{
            cin >> d;
        }

        auto it = prev(decr.lower_bound(d));
        if(*it == d) it = prev(it);
        int l = *it;
        int r = *incr.upper_bound(d);
        if(tm[d] == -1) r = d;
        if(tm[d - 1] == -1) l = d;
        //cerr << "test " << l << " " << r << "\n";
        
        if(a == -1) cout << r - l + 1 << "\n";
        else{
            if(l <= a && a <= r) cout << "yes\n";
            else cout << "no\n";
        }

    }

    return 0;
}

• Subtask 1: 0 / 2.5
• Subtask 2: 0 / 2.5
• Subtask 3: 0 / 2.5
• Subtask 4: 0 / 2.5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 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