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Submission #186848

# Submission time Handle Problem Language Result Execution time Memory
186848 2020-01-12T11:12:06 Z MiricaMatei Strange Device (APIO19_strange_device) C++14
100 / 100
 646 ms 69992 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1000005;
const long long INF = 1000000000000000000LL;

long long l[MAXN], r[MAXN];

int main() {
  //freopen("date.in", "r", stdin);
  //freopen("date.out", "w", stdout);

  long long n, a, b;
  scanf("%lld%lld%lld", &n, &a, &b);
  long long s = 0;
  for (int i = 1; i <= n; ++i) {
    scanf("%lld%lld", &l[i], &r[i]);
    s += (r[i] - l[i] + 1);
  }
  a /= __gcd(a, b + 1);
  if (a >= INF / b) {
    printf("%lld\n", s);
    return 0;
  }
  long long P = a * b;
  vector<pair<long long, long long> >interval;
  for (int i = 1; i <= n; ++i) {
    long long lg = r[i] - l[i] + 1;
    if (lg >= P) {
      printf("%lld\n", P);
      return 0;
    }
    if (r[i] % P >= l[i] % P) {
      interval.push_back({l[i] % P, r[i] % P});
    } else {
      interval.push_back({0, r[i] % P});
      interval.push_back({l[i] % P, P - 1});
    }
  }
  sort(interval.begin(), interval.end());
  long long mx = 0;
  long long ans = 0, lg = 0;
  for (auto it:interval) {
    //fprintf(stderr, "%lld %lld\n", it.first, it.second);
    lg += (it.second - it.first + 1);
    ans += max(0LL, it.second - max(it.first, mx) + 1);
    mx = max(mx, it.second + 1);
  }
  assert(lg == s);
  printf("%lld\n", ans);

  return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld%lld", &n, &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld", &l[i], &r[i]);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 8 ms 1272 KB Output is correct
3 Correct 8 ms 1272 KB Output is correct
4 Correct 2 ms 296 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 400 KB Output is correct
14 Correct 2 ms 400 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 8 ms 1252 KB Output is correct
17 Correct 66 ms 7756 KB Output is correct
18 Correct 2 ms 376 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 424 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 1 ms 248 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 3 ms 380 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 6 ms 420 KB Output is correct
5 Correct 437 ms 32584 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 400 KB Output is correct
2 Correct 584 ms 32656 KB Output is correct
3 Correct 572 ms 32728 KB Output is correct
4 Correct 559 ms 69852 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 400 KB Output is correct
2 Correct 584 ms 32656 KB Output is correct
3 Correct 572 ms 32728 KB Output is correct
4 Correct 559 ms 69852 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 576 ms 69772 KB Output is correct
7 Correct 586 ms 69808 KB Output is correct
8 Correct 566 ms 69748 KB Output is correct
9 Correct 627 ms 69752 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 400 KB Output is correct
2 Correct 584 ms 32656 KB Output is correct
3 Correct 572 ms 32728 KB Output is correct
4 Correct 559 ms 69852 KB Output is correct
5 Correct 2 ms 252 KB Output is correct
6 Correct 57 ms 7832 KB Output is correct
7 Correct 62 ms 7788 KB Output is correct
8 Correct 60 ms 7932 KB Output is correct
9 Correct 60 ms 7904 KB Output is correct
10 Correct 58 ms 7804 KB Output is correct
11 Correct 58 ms 7964 KB Output is correct
12 Correct 57 ms 7860 KB Output is correct
13 Correct 62 ms 7868 KB Output is correct
14 Correct 58 ms 7868 KB Output is correct
15 Correct 62 ms 7784 KB Output is correct
16 Correct 65 ms 7776 KB Output is correct
17 Correct 60 ms 7860 KB Output is correct
18 Correct 586 ms 69724 KB Output is correct
19 Correct 552 ms 69776 KB Output is correct
20 Correct 633 ms 69764 KB Output is correct
21 Correct 66 ms 7784 KB Output is correct
22 Correct 54 ms 7760 KB Output is correct
23 Correct 212 ms 26700 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 252 KB Output is correct
2 Correct 63 ms 6540 KB Output is correct
3 Correct 62 ms 6300 KB Output is correct
4 Correct 641 ms 32920 KB Output is correct
5 Correct 62 ms 6332 KB Output is correct
6 Correct 59 ms 6220 KB Output is correct
7 Correct 62 ms 6248 KB Output is correct
8 Correct 63 ms 6228 KB Output is correct
9 Correct 61 ms 6044 KB Output is correct
10 Correct 61 ms 5884 KB Output is correct
11 Correct 58 ms 5992 KB Output is correct
12 Correct 54 ms 5916 KB Output is correct
13 Correct 61 ms 5908 KB Output is correct
14 Correct 622 ms 32832 KB Output is correct
15 Correct 61 ms 5868 KB Output is correct
16 Correct 579 ms 69676 KB Output is correct
17 Correct 583 ms 69836 KB Output is correct
18 Correct 2 ms 376 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 8 ms 1272 KB Output is correct
3 Correct 8 ms 1272 KB Output is correct
4 Correct 2 ms 296 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 400 KB Output is correct
14 Correct 2 ms 400 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 8 ms 1252 KB Output is correct
17 Correct 66 ms 7756 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 424 KB Output is correct
20 Correct 2 ms 348 KB Output is correct
21 Correct 2 ms 348 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 1 ms 248 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 3 ms 380 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 6 ms 420 KB Output is correct
28 Correct 437 ms 32584 KB Output is correct
29 Correct 2 ms 400 KB Output is correct
30 Correct 584 ms 32656 KB Output is correct
31 Correct 572 ms 32728 KB Output is correct
32 Correct 559 ms 69852 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 576 ms 69772 KB Output is correct
35 Correct 586 ms 69808 KB Output is correct
36 Correct 566 ms 69748 KB Output is correct
37 Correct 627 ms 69752 KB Output is correct
38 Correct 2 ms 252 KB Output is correct
39 Correct 57 ms 7832 KB Output is correct
40 Correct 62 ms 7788 KB Output is correct
41 Correct 60 ms 7932 KB Output is correct
42 Correct 60 ms 7904 KB Output is correct
43 Correct 58 ms 7804 KB Output is correct
44 Correct 58 ms 7964 KB Output is correct
45 Correct 57 ms 7860 KB Output is correct
46 Correct 62 ms 7868 KB Output is correct
47 Correct 58 ms 7868 KB Output is correct
48 Correct 62 ms 7784 KB Output is correct
49 Correct 65 ms 7776 KB Output is correct
50 Correct 60 ms 7860 KB Output is correct
51 Correct 586 ms 69724 KB Output is correct
52 Correct 552 ms 69776 KB Output is correct
53 Correct 633 ms 69764 KB Output is correct
54 Correct 66 ms 7784 KB Output is correct
55 Correct 54 ms 7760 KB Output is correct
56 Correct 212 ms 26700 KB Output is correct
57 Correct 2 ms 252 KB Output is correct
58 Correct 63 ms 6540 KB Output is correct
59 Correct 62 ms 6300 KB Output is correct
60 Correct 641 ms 32920 KB Output is correct
61 Correct 62 ms 6332 KB Output is correct
62 Correct 59 ms 6220 KB Output is correct
63 Correct 62 ms 6248 KB Output is correct
64 Correct 63 ms 6228 KB Output is correct
65 Correct 61 ms 6044 KB Output is correct
66 Correct 61 ms 5884 KB Output is correct
67 Correct 58 ms 5992 KB Output is correct
68 Correct 54 ms 5916 KB Output is correct
69 Correct 61 ms 5908 KB Output is correct
70 Correct 622 ms 32832 KB Output is correct
71 Correct 61 ms 5868 KB Output is correct
72 Correct 579 ms 69676 KB Output is correct
73 Correct 583 ms 69836 KB Output is correct
74 Correct 2 ms 376 KB Output is correct
75 Correct 2 ms 376 KB Output is correct
76 Correct 3 ms 376 KB Output is correct
77 Correct 2 ms 376 KB Output is correct
78 Correct 2 ms 376 KB Output is correct
79 Correct 12 ms 1244 KB Output is correct
80 Correct 638 ms 69780 KB Output is correct
81 Correct 643 ms 69732 KB Output is correct
82 Correct 606 ms 69848 KB Output is correct
83 Correct 638 ms 69704 KB Output is correct
84 Correct 613 ms 69704 KB Output is correct
85 Correct 646 ms 69992 KB Output is correct
86 Correct 215 ms 26572 KB Output is correct
87 Correct 2 ms 376 KB Output is correct