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Submission #206166

# Submission time Handle Problem Language Result Execution time Memory
206166 2020-03-02T15:18:45 Z AlexLuchianov Strange Device (APIO19_strange_device) C++14
10 / 100
 840 ms 47168 KB 
#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#define MAX(a, b) (((a) < (b)) ? (b) : (a))

using ll = long long;
using ld = long double;

ll const inf = 1000000000000000000;

ll period(ll a, ll b){
  ll p = __gcd(a, b + 1);
  if(b / p <= inf / a)
    return b / p * a;
  return inf + 1;
}

int main()
{
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);

  int n;
  ll a, b;
  cin >> n >> a >> b;
  ll pi = period(a, b);
  if(inf < pi){
    ll result = 0;
    for(int i = 1;i <= n; i++){
      ll x, y;
      cin >> x >> y;
      result += y - x + 1;
    }
    cout << result;
  } else {
    vector<pair<ll,int>> event;
    for(int i = 1;i <= n; i++){
      ll x, y;
      cin >> x >> y;
      if(y - x < pi){
        if(x % pi <= y % pi){
          event.push_back({x % pi, 1});
          event.push_back({y % pi + 1, -1});
        } else {
          event.push_back({x % pi, 1});
          event.push_back({pi, -1});
          event.push_back({0, 1});
          event.push_back({y % pi + 1, -1});
        }
      } else {
        cout << pi;
        return 0;
      }
    }
    sort(event.begin(), event.end());
    ll result = 0, last = 0, sum = 0;
    for(int i = 0; i < event.size(); i++){
      if(0 < sum)
        result += event[i].first - last;
      last = event[i].first;
      sum += event[i].second;
    }
    cout << result;
  }
  return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:62:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < event.size(); i++){
                    ~~^~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 12 ms 1400 KB Output is correct
3 Correct 15 ms 1400 KB Output is correct
4 Incorrect 5 ms 376 KB Output isn't correct
5 Halted 0 ms 0 KB -

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 504 KB Output is correct
3 Correct 6 ms 632 KB Output is correct
4 Correct 5 ms 504 KB Output is correct
5 Correct 465 ms 35356 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 675 ms 47168 KB Output is correct
3 Incorrect 5 ms 376 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 675 ms 47168 KB Output is correct
3 Incorrect 5 ms 376 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 675 ms 47168 KB Output is correct
3 Incorrect 5 ms 376 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 376 KB Output is correct
2 Correct 90 ms 7392 KB Output is correct
3 Correct 82 ms 7272 KB Output is correct
4 Correct 840 ms 37056 KB Output is correct
5 Correct 79 ms 7392 KB Output is correct
6 Correct 78 ms 7276 KB Output is correct
7 Correct 76 ms 7272 KB Output is correct
8 Correct 80 ms 7276 KB Output is correct
9 Correct 84 ms 7420 KB Output is correct
10 Correct 80 ms 7392 KB Output is correct
11 Correct 80 ms 7276 KB Output is correct
12 Correct 68 ms 7272 KB Output is correct
13 Correct 82 ms 7272 KB Output is correct
14 Correct 795 ms 37020 KB Output is correct
15 Incorrect 81 ms 7272 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 12 ms 1400 KB Output is correct
3 Correct 15 ms 1400 KB Output is correct
4 Incorrect 5 ms 376 KB Output isn't correct
5 Halted 0 ms 0 KB -