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답안 #854308

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
854308 2023-09-26T17:30:20 Z MisterReaper Osumnjičeni (COCI21_osumnjiceni) C++17
30 / 110
 1000 ms 29280 KB 
//author: Ahmet Alp Orakci
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

bool intersect(int l1, int l2, int r1, int r2) {
    if(l2 < r1 || r2 < l1)
        return false;
    return true;
}

#define ONLINE_JUDGE
void solve() {
    int n;
    cin >> n;

    vector <array <int, 2>> vec(n +1);
    for(int i = 1; i <= n; i++) {
        cin >> vec[i][0] >> vec[i][1];
    }

    vector <vector <int>> bl(n +2);
    for(int i = 1; i <= n +1; i++)
        bl[i].resize(21);

    int l = 1, r = 1;
    while(l <= n) {
        if(r < l) {
            r++;
            continue;
        }

        auto ok = [&](int x) -> bool {
            bool res = true;
            for(int i = l; i < x && res; i++) {
                if(intersect(vec[i][0], vec[i][1], vec[x][0], vec[x][1])) 
                    res = false;
            }

            return res;
        };

        while(r +1 <= n && ok(r +1)) {
            r++;
        }

        //cerr << l << " " << r << "\n";
        bl[l][0] = r +1;
        l++;
    }

    bl[n +1][0] = n +1;

    for(int i = 1; i < 21; i++) {
        for(int j = 1; j <= n +1; j++) {
            bl[j][i] = bl[bl[j][i -1]][i -1];
        }
    }

    auto get = [&](int l, int r) -> int {
        int res = 0;
        for(int i = 20; i >= 0; i--) {
            if(bl[l][i] <= r) {
                l = bl[l][i];
                res += (1 << i);
            }
        }

        return res +1;
    };

    int q;
    cin >> q;
    
    while(q--) {
        int l, r;
        cin >> l >> r;
        cout << get(l, r) << "\n";
    }
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; //cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 27984 KB Output is correct
2 Correct 71 ms 27476 KB Output is correct
3 Correct 75 ms 27732 KB Output is correct
4 Correct 70 ms 28036 KB Output is correct
5 Correct 79 ms 29280 KB Output is correct
6 Correct 66 ms 26448 KB Output is correct
7 Correct 69 ms 26880 KB Output is correct
8 Correct 76 ms 27216 KB Output is correct
9 Correct 74 ms 27988 KB Output is correct
10 Correct 77 ms 27004 KB Output is correct
11 Execution timed out 1043 ms 27984 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 1112 KB Output is correct
2 Correct 3 ms 1112 KB Output is correct
3 Correct 3 ms 1196 KB Output is correct
4 Correct 4 ms 1112 KB Output is correct
5 Correct 3 ms 1112 KB Output is correct
6 Correct 3 ms 1112 KB Output is correct
7 Correct 4 ms 1380 KB Output is correct
8 Correct 3 ms 1112 KB Output is correct
9 Correct 4 ms 1112 KB Output is correct
10 Correct 3 ms 1116 KB Output is correct
11 Correct 17 ms 1116 KB Output is correct
12 Correct 15 ms 1112 KB Output is correct
13 Correct 16 ms 1112 KB Output is correct
14 Correct 9 ms 1368 KB Output is correct
15 Correct 9 ms 1112 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 4 ms 1112 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 1112 KB Output is correct
2 Correct 3 ms 1112 KB Output is correct
3 Correct 3 ms 1196 KB Output is correct
4 Correct 4 ms 1112 KB Output is correct
5 Correct 3 ms 1112 KB Output is correct
6 Correct 3 ms 1112 KB Output is correct
7 Correct 4 ms 1380 KB Output is correct
8 Correct 3 ms 1112 KB Output is correct
9 Correct 4 ms 1112 KB Output is correct
10 Correct 3 ms 1116 KB Output is correct
11 Correct 17 ms 1116 KB Output is correct
12 Correct 15 ms 1112 KB Output is correct
13 Correct 16 ms 1112 KB Output is correct
14 Correct 9 ms 1368 KB Output is correct
15 Correct 9 ms 1112 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 4 ms 1112 KB Output is correct
18 Correct 61 ms 3664 KB Output is correct
19 Correct 57 ms 3408 KB Output is correct
20 Correct 68 ms 3832 KB Output is correct
21 Correct 58 ms 3472 KB Output is correct
22 Correct 60 ms 3580 KB Output is correct
23 Correct 65 ms 3412 KB Output is correct
24 Correct 60 ms 3664 KB Output is correct
25 Correct 60 ms 3592 KB Output is correct
26 Correct 58 ms 3664 KB Output is correct
27 Correct 53 ms 3420 KB Output is correct
28 Correct 51 ms 3152 KB Output is correct
29 Correct 52 ms 3152 KB Output is correct
30 Correct 52 ms 3096 KB Output is correct
31 Correct 46 ms 3152 KB Output is correct
32 Correct 50 ms 3188 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 44 ms 3408 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 78 ms 29264 KB Output is correct
2 Correct 73 ms 28584 KB Output is correct
3 Correct 75 ms 26796 KB Output is correct
4 Correct 71 ms 26748 KB Output is correct
5 Correct 69 ms 27216 KB Output is correct
6 Correct 65 ms 26700 KB Output is correct
7 Correct 67 ms 26448 KB Output is correct
8 Correct 69 ms 26704 KB Output is correct
9 Correct 68 ms 26452 KB Output is correct
10 Correct 75 ms 28496 KB Output is correct
11 Execution timed out 1034 ms 26192 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #5
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 27984 KB Output is correct
2 Correct 71 ms 27476 KB Output is correct
3 Correct 75 ms 27732 KB Output is correct
4 Correct 70 ms 28036 KB Output is correct
5 Correct 79 ms 29280 KB Output is correct
6 Correct 66 ms 26448 KB Output is correct
7 Correct 69 ms 26880 KB Output is correct
8 Correct 76 ms 27216 KB Output is correct
9 Correct 74 ms 27988 KB Output is correct
10 Correct 77 ms 27004 KB Output is correct
11 Execution timed out 1043 ms 27984 KB Time limit exceeded
12 Halted 0 ms 0 KB -