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Submission #783433

# Submission time Handle Problem Language Result Execution time Memory
783433 2023-07-14T23:20:36 Z christinelynn Strange Device (APIO19_strange_device) C++17
10 / 100
 550 ms 63004 KB 
#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second

using namespace std;

const int INFF = 2e18;

int32_t main()
{
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        
        int n, a, b;
        cin >> n >> a >> b;

        /*
        0 0 0 0
        1 1 1 1
        2 2 2 2
        4 3 1 0
        5 4 2 1
        6 5 0 2
        8 6 2 0
        9 7 0 1
        10 8 1 2
        12 9 0 0

        0 0 0 0
        1 1 1 1
        2 2 0 2
        3 3 1 3
        5 4 1 0
        6 5 0 1
        7 6 1 2
        8 7 0 3
        10 8 0 0

        4 2

        0 0 0 0
        1 1 1 1
        3 2 3 0
        4 3 0 1
        6 4 2 0
        7 5 3 1
        9 6 1 2
        10 7 2 1
        12 8  0 0
        */

        set<pair<int, int>> seg;
        
        auto insert = [&](int l, int r) {
                auto it = seg.lower_bound({l, 0});
                if (!seg.empty() && it != seg.begin()) --it;

                int mnl = l, mxr = r;
                vector<pair<int, int>> del;

                for (; it != seg.end(); it++) {
                        if (it->fi > r) break;

                        if (it->fi < l && it->se >= l) {
                                del.push_back(*it);
                                mnl = min(mnl, it->fi);
                                mxr = max(mxr, it->se);
                        }

                        if (it->fi >= l && it->fi <= r) {
                                del.push_back(*it);
                                mnl = min(mnl, it->fi);
                                mxr = max(mxr, it->se);
                        }
                }

                for (auto p : del) seg.erase(p);

                seg.insert({mnl, mxr});
        };

        for (int i = 0; i < n; i++) {
                int l, r;
                cin >> l >> r;

                if (a <= INFF / b && r - l + 1 >= a * b) {
                        cout << a * b << '\n';
                        return 0;
                }
                
                if (a <= INFF / b) {
                        l %= a * b;
                        r %= a * b;
                }

                if (l <= r) {
                        insert(l, r);
                } else {
                        assert(a <= INFF / b);

                        insert(l, a * b - 1);
                        insert(0, r);
                }
        }
        
        int ans = 0;
        for (auto [l, r] : seg) ans += r - l + 1;

        cout << ans << '\n';

        return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 5 ms 852 KB Output is correct
3 Correct 4 ms 872 KB Output is correct
4 Incorrect 0 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 8 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 302 ms 304 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 513 ms 62892 KB Output is correct
3 Incorrect 531 ms 62928 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 513 ms 62892 KB Output is correct
3 Incorrect 531 ms 62928 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 513 ms 62892 KB Output is correct
3 Incorrect 531 ms 62928 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 49 ms 6480 KB Output is correct
3 Correct 55 ms 6452 KB Output is correct
4 Correct 528 ms 63004 KB Output is correct
5 Correct 53 ms 6672 KB Output is correct
6 Correct 51 ms 6608 KB Output is correct
7 Correct 54 ms 6604 KB Output is correct
8 Correct 51 ms 6664 KB Output is correct
9 Correct 50 ms 6692 KB Output is correct
10 Correct 44 ms 6676 KB Output is correct
11 Correct 45 ms 6576 KB Output is correct
12 Correct 49 ms 6572 KB Output is correct
13 Correct 49 ms 6680 KB Output is correct
14 Correct 550 ms 62992 KB Output is correct
15 Incorrect 52 ms 6640 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 5 ms 852 KB Output is correct
3 Correct 4 ms 872 KB Output is correct
4 Incorrect 0 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -