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Submission #200938

# Submission time Handle Problem Language Result Execution time Memory
200938 2020-02-08T17:53:05 Z baohiep Strange Device (APIO19_strange_device) C++14
100 / 100
 641 ms 57684 KB 
#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll MAXT=1e18;

int main() {
  ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
  int n; ll a, b; cin>>n>>a>>b;
  vector<pair<ll,ll>> p(n);
  for (auto &x: p) cin>>x.first>>x.second;

  /** the pair repeats after t=a*b/gcd(a, b+1) **/
  a/=__gcd(a, b+1);
  if (b>MAXT/a) {
    ll ans=0;
    for (auto &x: p) ans+=x.second-x.first+1;
    cout<<ans;
  } else {
    ll t=a*b;
    vector<pair<ll, ll>> p2;
    for (auto &x: p) {
      ll low=x.first-x.first%t;
      ll mid=low+t;
      ll high=x.second-x.second%t;
      if (low==high) {
        p2.emplace_back(x.first%t, x.second%t);
      } else if (mid!=high) {
        cout<<t;
        return 0;
      } else {
        p2.emplace_back(x.first%t, t-1);
        p2.emplace_back(0, x.second%t);
      }
    }
    sort(p2.begin(), p2.end());
    ll ans=0;
    ll last=-1;
    for (auto &x: p2) {
      if (last<x.second) {
        ans+=x.second-max(x.first, last+1)+1;
        last=x.second;
      }
    }
    cout<<ans;
  }
  return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 380 KB Output is correct
2 Correct 10 ms 1272 KB Output is correct
3 Correct 12 ms 1272 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 248 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 6 ms 376 KB Output is correct
16 Correct 11 ms 1272 KB Output is correct
17 Correct 67 ms 7788 KB Output is correct
18 Correct 5 ms 376 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 380 KB Output is correct
3 Correct 5 ms 504 KB Output is correct
4 Correct 6 ms 376 KB Output is correct
5 Correct 408 ms 57684 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 572 ms 34260 KB Output is correct
3 Correct 571 ms 45272 KB Output is correct
4 Correct 538 ms 45276 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 572 ms 34260 KB Output is correct
3 Correct 571 ms 45272 KB Output is correct
4 Correct 538 ms 45276 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 561 ms 45324 KB Output is correct
7 Correct 567 ms 45276 KB Output is correct
8 Correct 551 ms 45272 KB Output is correct
9 Correct 601 ms 45272 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 572 ms 34260 KB Output is correct
3 Correct 571 ms 45272 KB Output is correct
4 Correct 538 ms 45276 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 59 ms 7920 KB Output is correct
7 Correct 64 ms 7832 KB Output is correct
8 Correct 60 ms 7792 KB Output is correct
9 Correct 69 ms 7968 KB Output is correct
10 Correct 60 ms 7780 KB Output is correct
11 Correct 64 ms 7920 KB Output is correct
12 Correct 63 ms 7792 KB Output is correct
13 Correct 68 ms 7792 KB Output is correct
14 Correct 62 ms 7792 KB Output is correct
15 Correct 71 ms 7912 KB Output is correct
16 Correct 65 ms 7792 KB Output is correct
17 Correct 61 ms 7796 KB Output is correct
18 Correct 566 ms 45188 KB Output is correct
19 Correct 575 ms 45224 KB Output is correct
20 Correct 632 ms 45268 KB Output is correct
21 Correct 71 ms 7792 KB Output is correct
22 Correct 61 ms 7920 KB Output is correct
23 Correct 183 ms 26540 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 63 ms 7792 KB Output is correct
3 Correct 67 ms 7792 KB Output is correct
4 Correct 628 ms 34252 KB Output is correct
5 Correct 64 ms 7920 KB Output is correct
6 Correct 66 ms 7824 KB Output is correct
7 Correct 68 ms 7792 KB Output is correct
8 Correct 66 ms 7792 KB Output is correct
9 Correct 65 ms 7920 KB Output is correct
10 Correct 69 ms 7880 KB Output is correct
11 Correct 66 ms 7792 KB Output is correct
12 Correct 63 ms 7792 KB Output is correct
13 Correct 66 ms 7920 KB Output is correct
14 Correct 611 ms 34356 KB Output is correct
15 Correct 61 ms 7768 KB Output is correct
16 Correct 591 ms 34264 KB Output is correct
17 Correct 564 ms 34264 KB Output is correct
18 Correct 5 ms 376 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 380 KB Output is correct
2 Correct 10 ms 1272 KB Output is correct
3 Correct 12 ms 1272 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 248 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 6 ms 376 KB Output is correct
16 Correct 11 ms 1272 KB Output is correct
17 Correct 67 ms 7788 KB Output is correct
18 Correct 5 ms 376 KB Output is correct
19 Correct 5 ms 376 KB Output is correct
20 Correct 5 ms 376 KB Output is correct
21 Correct 5 ms 376 KB Output is correct
22 Correct 5 ms 376 KB Output is correct
23 Correct 5 ms 376 KB Output is correct
24 Correct 5 ms 376 KB Output is correct
25 Correct 5 ms 380 KB Output is correct
26 Correct 5 ms 504 KB Output is correct
27 Correct 6 ms 376 KB Output is correct
28 Correct 408 ms 57684 KB Output is correct
29 Correct 5 ms 376 KB Output is correct
30 Correct 572 ms 34260 KB Output is correct
31 Correct 571 ms 45272 KB Output is correct
32 Correct 538 ms 45276 KB Output is correct
33 Correct 5 ms 376 KB Output is correct
34 Correct 561 ms 45324 KB Output is correct
35 Correct 567 ms 45276 KB Output is correct
36 Correct 551 ms 45272 KB Output is correct
37 Correct 601 ms 45272 KB Output is correct
38 Correct 5 ms 376 KB Output is correct
39 Correct 59 ms 7920 KB Output is correct
40 Correct 64 ms 7832 KB Output is correct
41 Correct 60 ms 7792 KB Output is correct
42 Correct 69 ms 7968 KB Output is correct
43 Correct 60 ms 7780 KB Output is correct
44 Correct 64 ms 7920 KB Output is correct
45 Correct 63 ms 7792 KB Output is correct
46 Correct 68 ms 7792 KB Output is correct
47 Correct 62 ms 7792 KB Output is correct
48 Correct 71 ms 7912 KB Output is correct
49 Correct 65 ms 7792 KB Output is correct
50 Correct 61 ms 7796 KB Output is correct
51 Correct 566 ms 45188 KB Output is correct
52 Correct 575 ms 45224 KB Output is correct
53 Correct 632 ms 45268 KB Output is correct
54 Correct 71 ms 7792 KB Output is correct
55 Correct 61 ms 7920 KB Output is correct
56 Correct 183 ms 26540 KB Output is correct
57 Correct 5 ms 376 KB Output is correct
58 Correct 63 ms 7792 KB Output is correct
59 Correct 67 ms 7792 KB Output is correct
60 Correct 628 ms 34252 KB Output is correct
61 Correct 64 ms 7920 KB Output is correct
62 Correct 66 ms 7824 KB Output is correct
63 Correct 68 ms 7792 KB Output is correct
64 Correct 66 ms 7792 KB Output is correct
65 Correct 65 ms 7920 KB Output is correct
66 Correct 69 ms 7880 KB Output is correct
67 Correct 66 ms 7792 KB Output is correct
68 Correct 63 ms 7792 KB Output is correct
69 Correct 66 ms 7920 KB Output is correct
70 Correct 611 ms 34356 KB Output is correct
71 Correct 61 ms 7768 KB Output is correct
72 Correct 591 ms 34264 KB Output is correct
73 Correct 564 ms 34264 KB Output is correct
74 Correct 5 ms 376 KB Output is correct
75 Correct 5 ms 376 KB Output is correct
76 Correct 5 ms 376 KB Output is correct
77 Correct 5 ms 420 KB Output is correct
78 Correct 5 ms 376 KB Output is correct
79 Correct 11 ms 1272 KB Output is correct
80 Correct 641 ms 45108 KB Output is correct
81 Correct 639 ms 45260 KB Output is correct
82 Correct 621 ms 45168 KB Output is correct
83 Correct 615 ms 45228 KB Output is correct
84 Correct 607 ms 45156 KB Output is correct
85 Correct 609 ms 45088 KB Output is correct
86 Correct 186 ms 26596 KB Output is correct
87 Correct 5 ms 376 KB Output is correct