oj.uz

답안 #721676

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
721676 2023-04-11T06:29:43 Z drdilyor Event Hopping (BOI22_events) C++17
10 / 100
 1500 ms 11020 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;


const int inf = 1e9 + 1e5;
struct event {
    int l, r, i;
};

int main() {
    int n, m;
    cin >> n >> m;
    vector<event> ev(n), og;
    map<int,int> comp;
    int _i = 0;
    for (auto& [s, e, i] : ev) {
        cin >> s >> e;
        comp[s] = comp[e] = 0;
        i = _i++;
    }
    int k = 0;
    for (auto& mp : comp)
        mp.second = k++;
    for (auto& [s, e, i] : ev)
        s = comp[s], e = comp[e];

    og = ev;
    sort(ev.begin(), ev.end(), [&](auto& a, auto& b) {
        return a.r == b.r ? a.l < b.l : a.r < b.r ;
    });


    while (m--) {
        int s, e;
        cin >> s >> e;
        s--;e--;

        if (s == e) {
            cout << "0\n";
            continue;
        }


        int si = 0, ei = 0;
        for (int j = 0; j < n; j++) {
            if (ev[j].i == s) si = j;
            if (ev[j].i == e) ei = j;
        }

        int res = 0;
        bool found = 0;
        int left = ev[ei].l;
        set<int> st;
        for (int j = ei-1; j >= 0; j--) {
            auto [l,r,_i] = ev[j];
            if (r < left) {
                if (st.empty()) break;
                left = *st.begin();
                if (r < left) break;
                st.clear();
                res++;
                if (j == si) {
                    res++;
                    found = 1;
                    break;
                }
            } else if (j == si) {
                res++;
                found = 1;
                break;
            }
            st.insert(l);
            continue;
        }


        if (found) cout << res << '\n';
        else cout << "impossible\n";
    }

    return 0;
}

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 1576 ms 7228 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 4 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 6 ms 412 KB Output is correct
8 Correct 5 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 4 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 6 ms 412 KB Output is correct
8 Correct 5 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 5 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 3 ms 340 KB Output is correct
16 Correct 5 ms 340 KB Output is correct
17 Correct 5 ms 460 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Execution timed out 1580 ms 1292 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 4 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 340 KB Output is correct
7 Correct 6 ms 412 KB Output is correct
8 Correct 5 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 5 ms 340 KB Output is correct
13 Correct 3 ms 340 KB Output is correct
14 Correct 3 ms 340 KB Output is correct
15 Correct 4 ms 340 KB Output is correct
16 Correct 5 ms 340 KB Output is correct
17 Correct 5 ms 416 KB Output is correct
18 Correct 2 ms 212 KB Output is correct
19 Correct 403 ms 7348 KB Output is correct
20 Correct 234 ms 7320 KB Output is correct
21 Correct 504 ms 9588 KB Output is correct
22 Incorrect 246 ms 11020 KB Output isn't correct
23 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1582 ms 7396 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 1576 ms 7228 KB Time limit exceeded
3 Halted 0 ms 0 KB -