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Submission #137009

# Submission time Handle Problem Language Result Execution time Memory
137009 2019-07-26T22:15:05 Z arthurconmy Strange Device (APIO19_strange_device) C++14
100 / 100
 724 ms 43396 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <cmath>
#include <algorithm>
#include <map>
#include <queue>
#include <bitset>
#include <random>
#include <stack>
#include <deque>
#include <chrono>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define REP(i, a, b) for (int i = int(a); i <= int(b); i++)
#define REPb(j, d, c) for (int j = int(d); j >= int(c); j--)
#define ff first
#define ss second
#define pb push_back
#define len(x) int((x).size())

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	//ifstream cin("input.txt");
	//ifstream cin("test.in");
	//ofstream cout("test.out");

	ll n,a,b;
	cin>>n>>a>>b;	

	vector<pll> segs;

	ll s=0;

	REP(i,1,n)
	{
		ll l,r;
		cin>>l>>r;

		segs.pb({l,r});

		s+=r-l+1;
	}

	// if(s<=1e6 && false) // REMOVE THIS!!!
	// {
	// 	// brute force

	// 	vector<pll> pairs;

	// 	for(auto seg:segs)
	// 	{
	// 		for(ll i=seg.ff; i<=seg.ss; i++)
	// 		{
	// 			pairs.pb({(i+ll(i/b))%a,i%b});
	// 		}
	// 	}

	// 	sort(pairs.begin(),pairs.end());

	// 	ll ans=1;

	// 	REP(i,1,len(pairs)-1)
	// 	{
	// 		if(pairs[i]!=pairs[i-1]) ans++;
	// 	}

	// 	cout << ans << endl;
	// 	return 0;
	// }

	ll l=segs[0].ff;
	ll r=segs[0].ss;

	ll k = a/__gcd(a,b+1);
	
	// cout << k << endl;

	// we want to know when kB >= 1e18

	if(log(k) + log(b) >= 18*log(10))
	{
		cout << s << endl;
		return 0;
	}

	else
	{
		k*=b;

		vector<pll> intervals;

		for(auto seg:segs)
		{
			if(seg.ss-seg.ff+1 >= k)
			{
				cout << k << endl;
				return 0;
			}

			if(seg.ff%k > seg.ss%k)
			{
				intervals.pb({0,seg.ss%k});
				intervals.pb({seg.ff%k,k-1});
			}

			else
			{
				intervals.pb({seg.ff%k,seg.ss%k});
			}
		}

		sort(intervals.begin(),intervals.end());

		ll cur_start=intervals[0].ff;
		ll cur_end=intervals[0].ss;

		ll ans=0;

		REP(i,1,len(intervals)-1)
		{
			if(intervals[i].ff > cur_end+1)
			{
				ans += cur_end-cur_start+1;
				cur_start=intervals[i].ff;
				cur_end=intervals[i].ss;
			}

			else
			{
				cur_end=max(cur_end,intervals[i].ss);
			}
		}

		ans += cur_end-cur_start+1;

		cout << ans << endl;
	}
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:82:5: warning: unused variable 'l' [-Wunused-variable]
  ll l=segs[0].ff;
     ^
strange_device.cpp:83:5: warning: unused variable 'r' [-Wunused-variable]
  ll r=segs[0].ss;
     ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 9 ms 1308 KB Output is correct
3 Correct 9 ms 1272 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 380 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 9 ms 1272 KB Output is correct
17 Correct 72 ms 7272 KB Output is correct
18 Correct 2 ms 256 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 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 3 ms 504 KB Output is correct
5 Correct 483 ms 42228 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 645 ms 43396 KB Output is correct
3 Correct 639 ms 42188 KB Output is correct
4 Correct 638 ms 41696 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 645 ms 43396 KB Output is correct
3 Correct 639 ms 42188 KB Output is correct
4 Correct 638 ms 41696 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 639 ms 41668 KB Output is correct
7 Correct 640 ms 41592 KB Output is correct
8 Correct 643 ms 41668 KB Output is correct
9 Correct 701 ms 41492 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 645 ms 43396 KB Output is correct
3 Correct 639 ms 42188 KB Output is correct
4 Correct 638 ms 41696 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 64 ms 5848 KB Output is correct
7 Correct 69 ms 5940 KB Output is correct
8 Correct 66 ms 5896 KB Output is correct
9 Correct 68 ms 5868 KB Output is correct
10 Correct 65 ms 5708 KB Output is correct
11 Correct 67 ms 5624 KB Output is correct
12 Correct 64 ms 5608 KB Output is correct
13 Correct 72 ms 5764 KB Output is correct
14 Correct 65 ms 5608 KB Output is correct
15 Correct 71 ms 5632 KB Output is correct
16 Correct 70 ms 5644 KB Output is correct
17 Correct 67 ms 5608 KB Output is correct
18 Correct 646 ms 41280 KB Output is correct
19 Correct 634 ms 41076 KB Output is correct
20 Correct 705 ms 40912 KB Output is correct
21 Correct 70 ms 5096 KB Output is correct
22 Correct 63 ms 5096 KB Output is correct
23 Correct 210 ms 18100 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 70 ms 4972 KB Output is correct
3 Correct 69 ms 5020 KB Output is correct
4 Correct 719 ms 40584 KB Output is correct
5 Correct 71 ms 6544 KB Output is correct
6 Correct 73 ms 6464 KB Output is correct
7 Correct 71 ms 6548 KB Output is correct
8 Correct 73 ms 6464 KB Output is correct
9 Correct 69 ms 6252 KB Output is correct
10 Correct 70 ms 6260 KB Output is correct
11 Correct 71 ms 6504 KB Output is correct
12 Correct 64 ms 6636 KB Output is correct
13 Correct 71 ms 6348 KB Output is correct
14 Correct 692 ms 41740 KB Output is correct
15 Correct 69 ms 6396 KB Output is correct
16 Correct 635 ms 42040 KB Output is correct
17 Correct 646 ms 42060 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 9 ms 1308 KB Output is correct
3 Correct 9 ms 1272 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 380 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 9 ms 1272 KB Output is correct
17 Correct 72 ms 7272 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 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 3 ms 504 KB Output is correct
28 Correct 483 ms 42228 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 645 ms 43396 KB Output is correct
31 Correct 639 ms 42188 KB Output is correct
32 Correct 638 ms 41696 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 639 ms 41668 KB Output is correct
35 Correct 640 ms 41592 KB Output is correct
36 Correct 643 ms 41668 KB Output is correct
37 Correct 701 ms 41492 KB Output is correct
38 Correct 2 ms 256 KB Output is correct
39 Correct 64 ms 5848 KB Output is correct
40 Correct 69 ms 5940 KB Output is correct
41 Correct 66 ms 5896 KB Output is correct
42 Correct 68 ms 5868 KB Output is correct
43 Correct 65 ms 5708 KB Output is correct
44 Correct 67 ms 5624 KB Output is correct
45 Correct 64 ms 5608 KB Output is correct
46 Correct 72 ms 5764 KB Output is correct
47 Correct 65 ms 5608 KB Output is correct
48 Correct 71 ms 5632 KB Output is correct
49 Correct 70 ms 5644 KB Output is correct
50 Correct 67 ms 5608 KB Output is correct
51 Correct 646 ms 41280 KB Output is correct
52 Correct 634 ms 41076 KB Output is correct
53 Correct 705 ms 40912 KB Output is correct
54 Correct 70 ms 5096 KB Output is correct
55 Correct 63 ms 5096 KB Output is correct
56 Correct 210 ms 18100 KB Output is correct
57 Correct 2 ms 376 KB Output is correct
58 Correct 70 ms 4972 KB Output is correct
59 Correct 69 ms 5020 KB Output is correct
60 Correct 719 ms 40584 KB Output is correct
61 Correct 71 ms 6544 KB Output is correct
62 Correct 73 ms 6464 KB Output is correct
63 Correct 71 ms 6548 KB Output is correct
64 Correct 73 ms 6464 KB Output is correct
65 Correct 69 ms 6252 KB Output is correct
66 Correct 70 ms 6260 KB Output is correct
67 Correct 71 ms 6504 KB Output is correct
68 Correct 64 ms 6636 KB Output is correct
69 Correct 71 ms 6348 KB Output is correct
70 Correct 692 ms 41740 KB Output is correct
71 Correct 69 ms 6396 KB Output is correct
72 Correct 635 ms 42040 KB Output is correct
73 Correct 646 ms 42060 KB Output is correct
74 Correct 2 ms 376 KB Output is correct
75 Correct 2 ms 376 KB Output is correct
76 Correct 2 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 8 ms 1268 KB Output is correct
80 Correct 718 ms 41988 KB Output is correct
81 Correct 724 ms 41924 KB Output is correct
82 Correct 698 ms 42116 KB Output is correct
83 Correct 688 ms 42052 KB Output is correct
84 Correct 693 ms 42096 KB Output is correct
85 Correct 690 ms 41992 KB Output is correct
86 Correct 207 ms 20604 KB Output is correct
87 Correct 2 ms 376 KB Output is correct