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Submission #721868

# Submission time Handle Problem Language Result Execution time Memory
721868 2023-04-11T08:05:37 Z joelgun14 Strange Device (APIO19_strange_device) C++17
100 / 100
 1066 ms 69200 KB 
#include <bits/stdc++.h>
#define ll long long
#define lll __int128
#define endl "\n"
using namespace std;
ll gcd(ll a, ll b) {
    return b == 0 ? a : gcd(b, a % b);
}
int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    ll n, a, b;
    cin >> n >> a >> b;
    /*
    for(int i = 1; i <= n; ++i) {
        ll l, r;
        cin >> l >> r;
        for(int j = l; j <= r; ++j) {
            cout << (j + j / b) % a << " " << j % b << endl;
        }
    }
    */
    //return 0;
    // a or b has certain pattern
    // ab -> 1 cycle, no duplikat
    // next cycle: sama persis
    // maintain cycles in terms of ab, merge all segments
    // find modulo ab
    // exist more than one cycle long -> all possible
    // size ab berarti diff >= ab - 1
    vector<pair<lll, int>> sweep;
    ll ans = -1;
    lll tot;
    if(a == b + 1)
        tot = b;
    else
        tot = (lll)a * b / gcd(a, b + 1);
    set<pair<ll, ll>> s;
    // t + floor(t/b)
    // every a * b reset (pasti)
    //for(int j = 0; j <= a * b; ++j)
    //    s.insert(make_pair((ll)(j + j / b) % a, (ll)j % b));
    //cout << s.size() << " " << (ll)tot << endl;
    for(int i = 1; i <= n; ++i) {
        ll l, r;
        cin >> l >> r;
        if(r - l >= tot - 1) {
            ans = tot;
        }
        else {
            if(tot <= 1e18) {
                l = (l % tot);
                r = (r % tot);
            }
            if(l <= r) {
                sweep.push_back(make_pair(l, 0));
                sweep.push_back(make_pair(r, 1));
            }
            else {
                sweep.push_back(make_pair(l, 0));
                sweep.push_back(make_pair(tot - 1, 1));
                sweep.push_back(make_pair(0, 0));
                sweep.push_back(make_pair(r, 1));
            }
        }
    }
    if(ans != -1)
        cout << ans << endl, exit(0);
    sort(sweep.begin(), sweep.end());
    int cnt = 0;
    ll st = -5;
    ans = 0;
    for(auto i : sweep) {
        if(i.second) {
            // end
            --cnt;
            if(cnt == 0)
                ans += i.first - st;
        }
        else {
            // start
            // start itu + cnt
            // set start kalo belum di set
            if(cnt == 0)
                st = i.first - 1;
            ++cnt;
        }
    }
    cout << ans << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 6 ms 1524 KB Output is correct
3 Correct 7 ms 1492 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 6 ms 1492 KB Output is correct
17 Correct 68 ms 8740 KB Output is correct
18 Correct 1 ms 212 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 324 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 418 ms 66164 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 630 ms 66364 KB Output is correct
3 Correct 664 ms 66452 KB Output is correct
4 Correct 641 ms 68784 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 630 ms 66364 KB Output is correct
3 Correct 664 ms 66452 KB Output is correct
4 Correct 641 ms 68784 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 676 ms 69200 KB Output is correct
7 Correct 611 ms 68608 KB Output is correct
8 Correct 595 ms 68612 KB Output is correct
9 Correct 747 ms 68504 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 630 ms 66364 KB Output is correct
3 Correct 664 ms 66452 KB Output is correct
4 Correct 641 ms 68784 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 58 ms 9896 KB Output is correct
7 Correct 66 ms 10052 KB Output is correct
8 Correct 57 ms 9932 KB Output is correct
9 Correct 59 ms 9908 KB Output is correct
10 Correct 55 ms 9888 KB Output is correct
11 Correct 60 ms 9932 KB Output is correct
12 Correct 55 ms 9872 KB Output is correct
13 Correct 63 ms 9932 KB Output is correct
14 Correct 65 ms 9940 KB Output is correct
15 Correct 88 ms 9956 KB Output is correct
16 Correct 67 ms 9908 KB Output is correct
17 Correct 56 ms 9912 KB Output is correct
18 Correct 638 ms 68408 KB Output is correct
19 Correct 586 ms 67624 KB Output is correct
20 Correct 749 ms 67696 KB Output is correct
21 Correct 70 ms 9880 KB Output is correct
22 Correct 64 ms 9952 KB Output is correct
23 Correct 171 ms 34636 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 64 ms 8832 KB Output is correct
3 Correct 65 ms 8732 KB Output is correct
4 Correct 818 ms 66148 KB Output is correct
5 Correct 72 ms 8800 KB Output is correct
6 Correct 68 ms 8828 KB Output is correct
7 Correct 74 ms 8820 KB Output is correct
8 Correct 73 ms 8760 KB Output is correct
9 Correct 67 ms 8816 KB Output is correct
10 Correct 74 ms 8820 KB Output is correct
11 Correct 81 ms 8888 KB Output is correct
12 Correct 64 ms 8904 KB Output is correct
13 Correct 85 ms 8788 KB Output is correct
14 Correct 780 ms 66104 KB Output is correct
15 Correct 72 ms 8900 KB Output is correct
16 Correct 582 ms 67564 KB Output is correct
17 Correct 673 ms 67732 KB Output is correct
18 Correct 1 ms 340 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 6 ms 1524 KB Output is correct
3 Correct 7 ms 1492 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 6 ms 1492 KB Output is correct
17 Correct 68 ms 8740 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 324 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 418 ms 66164 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 630 ms 66364 KB Output is correct
31 Correct 664 ms 66452 KB Output is correct
32 Correct 641 ms 68784 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 676 ms 69200 KB Output is correct
35 Correct 611 ms 68608 KB Output is correct
36 Correct 595 ms 68612 KB Output is correct
37 Correct 747 ms 68504 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 58 ms 9896 KB Output is correct
40 Correct 66 ms 10052 KB Output is correct
41 Correct 57 ms 9932 KB Output is correct
42 Correct 59 ms 9908 KB Output is correct
43 Correct 55 ms 9888 KB Output is correct
44 Correct 60 ms 9932 KB Output is correct
45 Correct 55 ms 9872 KB Output is correct
46 Correct 63 ms 9932 KB Output is correct
47 Correct 65 ms 9940 KB Output is correct
48 Correct 88 ms 9956 KB Output is correct
49 Correct 67 ms 9908 KB Output is correct
50 Correct 56 ms 9912 KB Output is correct
51 Correct 638 ms 68408 KB Output is correct
52 Correct 586 ms 67624 KB Output is correct
53 Correct 749 ms 67696 KB Output is correct
54 Correct 70 ms 9880 KB Output is correct
55 Correct 64 ms 9952 KB Output is correct
56 Correct 171 ms 34636 KB Output is correct
57 Correct 1 ms 212 KB Output is correct
58 Correct 64 ms 8832 KB Output is correct
59 Correct 65 ms 8732 KB Output is correct
60 Correct 818 ms 66148 KB Output is correct
61 Correct 72 ms 8800 KB Output is correct
62 Correct 68 ms 8828 KB Output is correct
63 Correct 74 ms 8820 KB Output is correct
64 Correct 73 ms 8760 KB Output is correct
65 Correct 67 ms 8816 KB Output is correct
66 Correct 74 ms 8820 KB Output is correct
67 Correct 81 ms 8888 KB Output is correct
68 Correct 64 ms 8904 KB Output is correct
69 Correct 85 ms 8788 KB Output is correct
70 Correct 780 ms 66104 KB Output is correct
71 Correct 72 ms 8900 KB Output is correct
72 Correct 582 ms 67564 KB Output is correct
73 Correct 673 ms 67732 KB Output is correct
74 Correct 1 ms 340 KB Output is correct
75 Correct 1 ms 212 KB Output is correct
76 Correct 1 ms 340 KB Output is correct
77 Correct 1 ms 212 KB Output is correct
78 Correct 1 ms 328 KB Output is correct
79 Correct 6 ms 1864 KB Output is correct
80 Correct 815 ms 67668 KB Output is correct
81 Correct 1020 ms 67720 KB Output is correct
82 Correct 784 ms 67588 KB Output is correct
83 Correct 813 ms 67716 KB Output is correct
84 Correct 851 ms 67632 KB Output is correct
85 Correct 1066 ms 67472 KB Output is correct
86 Correct 208 ms 37116 KB Output is correct
87 Correct 1 ms 320 KB Output is correct