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Submission #698855

# Submission time Handle Problem Language Result Execution time Memory
698855 2023-02-14T13:41:41 Z Abrar_Al_Samit Strange Device (APIO19_strange_device) C++17
100 / 100
 713 ms 115872 KB 
#include<bits/stdc++.h>
using namespace std;

long long gcd(long long x, long long y) {
    if (y == 0) return x;
    return gcd(y, x%y);
}
void PlayGround() {
  long long n, a, b;
  cin>>n>>a>>b;

  vector<array<long long,2>>iner(n);
  for(int i=0; i<n; ++i) {
    cin>>iner[i][0]>>iner[i][1];
  }

  long long g = gcd(a, b+1);
  long long interval = (a / gcd(a, b+1));
  bool toobig = false;
  if(log10(interval)+log10(b)>18) {
    toobig = true;
  } else {
    interval *= b;
  }

  for(int i=0; i<n; ++i) {
    long long len = iner[i][1] - iner[i][0] + 1;
    if(!toobig && len>=interval) {
      cout<<interval<<'\n';
      return;
    }
  }

  set<pair<long long, long long>>s;


  for(int i=0; i<n; ++i) {
    long long len = iner[i][1]-iner[i][0]+1;
    long long l = iner[i][0]%interval;
    long long r = iner[i][1]%interval;
    if(!toobig) {
      if(l>r) {
        s.insert({l, interval-1});
        s.insert({0, r});
      } else {
        s.insert({l, r});
      }
    } else {
      s.insert({l, r});
    }
  }

  long long ans = 0;
  while(!s.empty()) {
    auto it = s.begin();
    s.erase(it);
    long long l = it->first, r = it->second;
    if(!s.empty()) {
      auto nx = s.upper_bound(*it);
      if(nx->second>=r) r = min(r, nx->first-1);
      else {
        s.erase(nx);
        s.insert(*it);
        continue;
      }
    }
    ans += max(0LL, r-l+1);
  }
  cout<<ans<<'\n';

  // cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  PlayGround();
  return 0;
}

Compilation message

strange_device.cpp: In function 'void PlayGround()':
strange_device.cpp:38:15: warning: unused variable 'len' [-Wunused-variable]
   38 |     long long len = iner[i][1]-iner[i][0]+1;
      |               ^~~
strange_device.cpp:17:13: warning: unused variable 'g' [-Wunused-variable]
   17 |   long long g = gcd(a, b+1);
      |             ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 5 ms 1108 KB Output is correct
3 Correct 5 ms 1108 KB Output is correct
4 Correct 0 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 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 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 1108 KB Output is correct
17 Correct 55 ms 8020 KB Output is correct
18 Correct 0 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 0 ms 212 KB Output is correct
3 Correct 0 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 244 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 244 ms 15956 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 528 ms 78504 KB Output is correct
3 Correct 574 ms 78896 KB Output is correct
4 Correct 618 ms 78580 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 528 ms 78504 KB Output is correct
3 Correct 574 ms 78896 KB Output is correct
4 Correct 618 ms 78580 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 560 ms 78528 KB Output is correct
7 Correct 570 ms 78584 KB Output is correct
8 Correct 570 ms 78704 KB Output is correct
9 Correct 670 ms 78564 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 528 ms 78504 KB Output is correct
3 Correct 574 ms 78896 KB Output is correct
4 Correct 618 ms 78580 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 48 ms 8140 KB Output is correct
7 Correct 50 ms 8104 KB Output is correct
8 Correct 51 ms 8036 KB Output is correct
9 Correct 57 ms 8080 KB Output is correct
10 Correct 49 ms 8012 KB Output is correct
11 Correct 50 ms 8036 KB Output is correct
12 Correct 51 ms 8032 KB Output is correct
13 Correct 56 ms 8020 KB Output is correct
14 Correct 51 ms 8140 KB Output is correct
15 Correct 66 ms 8024 KB Output is correct
16 Correct 60 ms 11852 KB Output is correct
17 Correct 55 ms 11844 KB Output is correct
18 Correct 586 ms 115672 KB Output is correct
19 Correct 639 ms 115608 KB Output is correct
20 Correct 713 ms 115616 KB Output is correct
21 Correct 54 ms 11856 KB Output is correct
22 Correct 56 ms 11984 KB Output is correct
23 Correct 110 ms 18252 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 73 ms 8028 KB Output is correct
3 Correct 59 ms 8024 KB Output is correct
4 Correct 653 ms 78508 KB Output is correct
5 Correct 60 ms 8188 KB Output is correct
6 Correct 57 ms 8156 KB Output is correct
7 Correct 59 ms 8160 KB Output is correct
8 Correct 61 ms 8268 KB Output is correct
9 Correct 58 ms 8156 KB Output is correct
10 Correct 55 ms 8152 KB Output is correct
11 Correct 55 ms 8152 KB Output is correct
12 Correct 53 ms 8164 KB Output is correct
13 Correct 58 ms 8268 KB Output is correct
14 Correct 667 ms 78524 KB Output is correct
15 Correct 57 ms 11852 KB Output is correct
16 Correct 600 ms 115664 KB Output is correct
17 Correct 596 ms 115676 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 0 ms 212 KB Output is correct
2 Correct 5 ms 1108 KB Output is correct
3 Correct 5 ms 1108 KB Output is correct
4 Correct 0 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 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 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 1108 KB Output is correct
17 Correct 55 ms 8020 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 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 244 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 244 ms 15956 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 528 ms 78504 KB Output is correct
31 Correct 574 ms 78896 KB Output is correct
32 Correct 618 ms 78580 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 560 ms 78528 KB Output is correct
35 Correct 570 ms 78584 KB Output is correct
36 Correct 570 ms 78704 KB Output is correct
37 Correct 670 ms 78564 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 48 ms 8140 KB Output is correct
40 Correct 50 ms 8104 KB Output is correct
41 Correct 51 ms 8036 KB Output is correct
42 Correct 57 ms 8080 KB Output is correct
43 Correct 49 ms 8012 KB Output is correct
44 Correct 50 ms 8036 KB Output is correct
45 Correct 51 ms 8032 KB Output is correct
46 Correct 56 ms 8020 KB Output is correct
47 Correct 51 ms 8140 KB Output is correct
48 Correct 66 ms 8024 KB Output is correct
49 Correct 60 ms 11852 KB Output is correct
50 Correct 55 ms 11844 KB Output is correct
51 Correct 586 ms 115672 KB Output is correct
52 Correct 639 ms 115608 KB Output is correct
53 Correct 713 ms 115616 KB Output is correct
54 Correct 54 ms 11856 KB Output is correct
55 Correct 56 ms 11984 KB Output is correct
56 Correct 110 ms 18252 KB Output is correct
57 Correct 0 ms 212 KB Output is correct
58 Correct 73 ms 8028 KB Output is correct
59 Correct 59 ms 8024 KB Output is correct
60 Correct 653 ms 78508 KB Output is correct
61 Correct 60 ms 8188 KB Output is correct
62 Correct 57 ms 8156 KB Output is correct
63 Correct 59 ms 8160 KB Output is correct
64 Correct 61 ms 8268 KB Output is correct
65 Correct 58 ms 8156 KB Output is correct
66 Correct 55 ms 8152 KB Output is correct
67 Correct 55 ms 8152 KB Output is correct
68 Correct 53 ms 8164 KB Output is correct
69 Correct 58 ms 8268 KB Output is correct
70 Correct 667 ms 78524 KB Output is correct
71 Correct 57 ms 11852 KB Output is correct
72 Correct 600 ms 115664 KB Output is correct
73 Correct 596 ms 115676 KB Output is correct
74 Correct 1 ms 212 KB Output is correct
75 Correct 1 ms 212 KB Output is correct
76 Correct 1 ms 212 KB Output is correct
77 Correct 1 ms 320 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 6 ms 1480 KB Output is correct
80 Correct 641 ms 115796 KB Output is correct
81 Correct 625 ms 115656 KB Output is correct
82 Correct 712 ms 115864 KB Output is correct
83 Correct 700 ms 115720 KB Output is correct
84 Correct 676 ms 115872 KB Output is correct
85 Correct 658 ms 115696 KB Output is correct
86 Correct 124 ms 18184 KB Output is correct
87 Correct 1 ms 212 KB Output is correct