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Submission #1014080

# Submission time Handle Problem Language Result Execution time Memory
1014080 2024-07-04T10:31:06 Z Ariadna Curtains (NOI23_curtains) C++14
9 / 100
 1500 ms 10648 KB 
#include <bits/stdc++.h>

using namespace std;

struct Segtree {
    int n;
    vector<int> st, lz;

    Segtree(const int N) {
        n = N;
        st = vector<int>(4*n, 0);
        lz = vector<int>(4*n, 0);
    }

    void push(int p, int l, int r) {
        if (lz[p] == 0) return;
        if (l != r) {
            int m = (l+r)/2;
            st[2*p] += lz[p];
            st[2*p+1] += lz[p];
            lz[2*p] += lz[p];
            lz[2*p+1] += lz[p];
        }
        lz[p] = 0;
    }

    void add(int p, int l, int r, int i, int j, int v) {
        if (i > j) return;
        push(p, l, r);
        if (l == i && r == j) {
            st[p] += v;
            lz[p] += v;
        } else {
            int m = (l+r)/2;
            add(2*p, l, m, i, min(m, j), v);
            add(2*p+1, m+1, r, max(m+1, i), j, v);
            st[p] = min(st[2*p], st[2*p+1]);
        }
    }

    int Min(int p, int l, int r, int i, int j) {
        if (i > j) return 1e9;
        push(p, l, r);
        if (l == i && r == j) return st[p];
        int m = (l+r)/2;
        return min(Min(2*p, l, m, i, min(m, j)), Min(2*p+1, m+1, r, max(i, m+1), j));
    }

    void add(int i, int j, int v) { add(1, 0, n-1, i, j, v); }
    int Min(int i, int j) { return Min(1, 0, n-1, i, j); }
};

int main() {
    int n, m, q;
    cin >> n >> m >> q;
    vector<pair<int, int>> curtains(m);
    for (int i = 0; i < m; ++i) {
        cin >> curtains[i].first >> curtains[i].second;
        --curtains[i].first; --curtains[i].second;
    }

    vector<pair<pair<int, int>, int>> queries(q);
    for (int i = 0; i < q; ++i) {
        cin >> queries[i].first.first >> queries[i].first.second;
        --queries[i].first.first; --queries[i].first.second;
        queries[i].second = i;
    }

    sort(curtains.begin(), curtains.end());
    sort(queries.begin(), queries.end());

    vector<bool> used(m, false), ans_query(q);
    Segtree Stage(n);

    int last_used = 0;
    for (int i = 0; i < q; ++i) {
        int l = queries[i].first.first, r = queries[i].first.second;
        
        for (int j = 0; j < m && curtains[j].first <= r; ++j) {
            if (curtains[j].first >= l && curtains[j].second <= r) continue;
            if (used[j]) Stage.add(curtains[j].first, curtains[j].second, -1);
            used[j] = false;
        }

        for (int j = 0; j < m && curtains[j].first <= r; ++j) {
            if (curtains[j].first < l) continue;
            if (curtains[j].second <= r) {
                if (!used[j]) Stage.add(curtains[j].first, curtains[j].second, 1);
                used[j] = true;
            }
        }

        ans_query[queries[i].second] = (Stage.Min(l, r)>0);
    }

    for (int i = 0; i < q; ++i) {
        if (ans_query[i]) cout << "YES\n";
        else cout << "NO\n";
    }

    return 0;
}

Compilation message

curtains.cpp: In member function 'void Segtree::push(int, int, int)':
curtains.cpp:18:17: warning: unused variable 'm' [-Wunused-variable]
   18 |             int m = (l+r)/2;
      |                 ^
curtains.cpp: In function 'int main()':
curtains.cpp:75:9: warning: unused variable 'last_used' [-Wunused-variable]
   75 |     int last_used = 0;
      |         ^~~~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 440 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 440 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 103 ms 348 KB Output is correct
14 Correct 107 ms 348 KB Output is correct
15 Correct 100 ms 544 KB Output is correct
16 Correct 89 ms 344 KB Output is correct
17 Correct 11 ms 348 KB Output is correct
18 Correct 6 ms 568 KB Output is correct
19 Correct 7 ms 344 KB Output is correct
20 Correct 9 ms 348 KB Output is correct
21 Correct 17 ms 568 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 440 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 103 ms 348 KB Output is correct
14 Correct 107 ms 348 KB Output is correct
15 Correct 100 ms 544 KB Output is correct
16 Correct 89 ms 344 KB Output is correct
17 Correct 11 ms 348 KB Output is correct
18 Correct 6 ms 568 KB Output is correct
19 Correct 7 ms 344 KB Output is correct
20 Correct 9 ms 348 KB Output is correct
21 Correct 17 ms 568 KB Output is correct
22 Execution timed out 1567 ms 10648 KB Time limit exceeded
23 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 12 ms 348 KB Output is correct
6 Correct 7 ms 348 KB Output is correct
7 Correct 6 ms 348 KB Output is correct
8 Execution timed out 1594 ms 9528 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 440 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 103 ms 348 KB Output is correct
14 Correct 107 ms 348 KB Output is correct
15 Correct 100 ms 544 KB Output is correct
16 Correct 89 ms 344 KB Output is correct
17 Correct 11 ms 348 KB Output is correct
18 Correct 6 ms 568 KB Output is correct
19 Correct 7 ms 344 KB Output is correct
20 Correct 9 ms 348 KB Output is correct
21 Correct 17 ms 568 KB Output is correct
22 Execution timed out 1587 ms 4436 KB Time limit exceeded
23 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 440 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 103 ms 348 KB Output is correct
14 Correct 107 ms 348 KB Output is correct
15 Correct 100 ms 544 KB Output is correct
16 Correct 89 ms 344 KB Output is correct
17 Correct 11 ms 348 KB Output is correct
18 Correct 6 ms 568 KB Output is correct
19 Correct 7 ms 344 KB Output is correct
20 Correct 9 ms 348 KB Output is correct
21 Correct 17 ms 568 KB Output is correct
22 Execution timed out 1567 ms 10648 KB Time limit exceeded
23 Halted 0 ms 0 KB -