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Submission #743662

# Submission time Handle Problem Language Result Execution time Memory
743662 2023-05-17T16:00:10 Z fanwen Strange Device (APIO19_strange_device) C++17
100 / 100
 612 ms 45616 KB 
#include <bits/stdc++.h>

using namespace std;

#define MASK(x) (1LL << (x))
#define BIT(x, i) (((x) >> (i)) & 1)
#define ALL(x) (x).begin(), (x).end()

#define REP(i, n) for (int i = 0, _n = n; i < _n; ++i)
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; --i)
#define FORE(it, s) for (__typeof(s.begin()) it = (s).begin(); it != (s).end(); ++it)

#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define file(TASK)                         \
    if (fopen(TASK ".inp", "r")) {         \
        freopen(TASK ".inp", "r", stdin);  \
        freopen(TASK ".out", "w", stdout); \
    }

template <class U, class V> bool maximize(U &A, const V &B) { return (A < B) ? (A = B, true) : false; }
template <class U, class V> bool minimize(U &A, const V &B) { return (A > B) ? (A = B, true) : false; }
int N;
#define int long long
const int INF = 2e18;
long long A, B;
void process(void) {
    cin >> N >> A >> B;
    int period = A / __gcd(A, B + 1);
    if(INF / B >= period) period *= B;
    else period = INF;
    vector <pair <int, int>> events;
    while(N--) {
        int l, r; cin >> l >> r;
        if(r - l + 1 >= period) return void(cout << period);
        l %= period, r %= period;
        if(l <= r) {
            events.push_back(make_pair(l, 0));
            events.push_back(make_pair(r, 1));
        } else {
            events.push_back(make_pair(0, 0));
            events.push_back(make_pair(r, 1));
            events.push_back(make_pair(l, 0));
            events.push_back(make_pair(period - 1, 1));
        }
    }
    sort(ALL(events));
    int ans = 0, Leftmost = -1, cnt = 0;
    for (auto [x, i] : events) {
        if(i == 0) {
            cnt++;
            if(Leftmost == -1) Leftmost = x;
        } else {
            cnt--;
            if(cnt == 0) {
                ans += x - Leftmost + 1;
                Leftmost = -1;
            }
        }
    }
    cout << ans;
}
signed main() {
    file("TASK");
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int test = 1;
    // cin >> test;
    while(test--) {
        process();
        cout << '\n';
    }
    cerr << "Time elapsed: " << TIME << " s.\n";
    return (0 ^ 0);
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(TASK ".inp", "r", stdin);  \
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:64:5: note: in expansion of macro 'file'
   64 |     file("TASK");
      |     ^~~~
strange_device.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen(TASK ".out", "w", stdout); \
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:64:5: note: in expansion of macro 'file'
   64 |     file("TASK");
      |     ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 7 ms 856 KB Output is correct
3 Correct 5 ms 984 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 5 ms 984 KB Output is correct
17 Correct 65 ms 4516 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 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 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 322 ms 33344 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 479 ms 33188 KB Output is correct
3 Correct 478 ms 33244 KB Output is correct
4 Correct 455 ms 33176 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 479 ms 33188 KB Output is correct
3 Correct 478 ms 33244 KB Output is correct
4 Correct 455 ms 33176 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 478 ms 33272 KB Output is correct
7 Correct 460 ms 33308 KB Output is correct
8 Correct 464 ms 33176 KB Output is correct
9 Correct 552 ms 33248 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 479 ms 33188 KB Output is correct
3 Correct 478 ms 33244 KB Output is correct
4 Correct 455 ms 33176 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 52 ms 4552 KB Output is correct
7 Correct 50 ms 4480 KB Output is correct
8 Correct 46 ms 4576 KB Output is correct
9 Correct 49 ms 4544 KB Output is correct
10 Correct 45 ms 4580 KB Output is correct
11 Correct 48 ms 4560 KB Output is correct
12 Correct 47 ms 4452 KB Output is correct
13 Correct 57 ms 4552 KB Output is correct
14 Correct 51 ms 4496 KB Output is correct
15 Correct 53 ms 4556 KB Output is correct
16 Correct 53 ms 4516 KB Output is correct
17 Correct 46 ms 4556 KB Output is correct
18 Correct 470 ms 33480 KB Output is correct
19 Correct 449 ms 33232 KB Output is correct
20 Correct 564 ms 33216 KB Output is correct
21 Correct 51 ms 4556 KB Output is correct
22 Correct 40 ms 4556 KB Output is correct
23 Correct 134 ms 16788 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 51 ms 4460 KB Output is correct
3 Correct 52 ms 4536 KB Output is correct
4 Correct 600 ms 33288 KB Output is correct
5 Correct 51 ms 4556 KB Output is correct
6 Correct 50 ms 4556 KB Output is correct
7 Correct 53 ms 4580 KB Output is correct
8 Correct 52 ms 4556 KB Output is correct
9 Correct 50 ms 4556 KB Output is correct
10 Correct 52 ms 4476 KB Output is correct
11 Correct 53 ms 4544 KB Output is correct
12 Correct 47 ms 4568 KB Output is correct
13 Correct 52 ms 4548 KB Output is correct
14 Correct 563 ms 33200 KB Output is correct
15 Correct 54 ms 4556 KB Output is correct
16 Correct 454 ms 33172 KB Output is correct
17 Correct 482 ms 33180 KB Output is correct
18 Correct 1 ms 212 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 7 ms 856 KB Output is correct
3 Correct 5 ms 984 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 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 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 5 ms 984 KB Output is correct
17 Correct 65 ms 4516 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 322 ms 33344 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 479 ms 33188 KB Output is correct
31 Correct 478 ms 33244 KB Output is correct
32 Correct 455 ms 33176 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 478 ms 33272 KB Output is correct
35 Correct 460 ms 33308 KB Output is correct
36 Correct 464 ms 33176 KB Output is correct
37 Correct 552 ms 33248 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 52 ms 4552 KB Output is correct
40 Correct 50 ms 4480 KB Output is correct
41 Correct 46 ms 4576 KB Output is correct
42 Correct 49 ms 4544 KB Output is correct
43 Correct 45 ms 4580 KB Output is correct
44 Correct 48 ms 4560 KB Output is correct
45 Correct 47 ms 4452 KB Output is correct
46 Correct 57 ms 4552 KB Output is correct
47 Correct 51 ms 4496 KB Output is correct
48 Correct 53 ms 4556 KB Output is correct
49 Correct 53 ms 4516 KB Output is correct
50 Correct 46 ms 4556 KB Output is correct
51 Correct 470 ms 33480 KB Output is correct
52 Correct 449 ms 33232 KB Output is correct
53 Correct 564 ms 33216 KB Output is correct
54 Correct 51 ms 4556 KB Output is correct
55 Correct 40 ms 4556 KB Output is correct
56 Correct 134 ms 16788 KB Output is correct
57 Correct 0 ms 212 KB Output is correct
58 Correct 51 ms 4460 KB Output is correct
59 Correct 52 ms 4536 KB Output is correct
60 Correct 600 ms 33288 KB Output is correct
61 Correct 51 ms 4556 KB Output is correct
62 Correct 50 ms 4556 KB Output is correct
63 Correct 53 ms 4580 KB Output is correct
64 Correct 52 ms 4556 KB Output is correct
65 Correct 50 ms 4556 KB Output is correct
66 Correct 52 ms 4476 KB Output is correct
67 Correct 53 ms 4544 KB Output is correct
68 Correct 47 ms 4568 KB Output is correct
69 Correct 52 ms 4548 KB Output is correct
70 Correct 563 ms 33200 KB Output is correct
71 Correct 54 ms 4556 KB Output is correct
72 Correct 454 ms 33172 KB Output is correct
73 Correct 482 ms 33180 KB Output is correct
74 Correct 1 ms 212 KB Output is correct
75 Correct 1 ms 316 KB Output is correct
76 Correct 1 ms 320 KB Output is correct
77 Correct 1 ms 212 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 5 ms 1240 KB Output is correct
80 Correct 612 ms 45436 KB Output is correct
81 Correct 607 ms 45572 KB Output is correct
82 Correct 561 ms 45440 KB Output is correct
83 Correct 572 ms 45504 KB Output is correct
84 Correct 608 ms 45392 KB Output is correct
85 Correct 545 ms 45616 KB Output is correct
86 Correct 142 ms 26668 KB Output is correct
87 Correct 1 ms 256 KB Output is correct