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Submission #206606

# Submission time Handle Problem Language Result Execution time Memory
206606 2020-03-04T07:57:03 Z kshitij_sodani Strange Device (APIO19_strange_device) C++17
50 / 100
 648 ms 56496 KB 
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long llo;
#define ak first
#define  bk second
#define endl "\n"
llo gcd(llo kk,llo ll){
	if(ll==0){
		return kk;
	}
	return gcd(ll,kk%ll);
}
const llo inf = (llo)1e18 + 3;

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	llo n,a,b;
	cin>>n>>a>>b;
	llo x;
	vector<pair<llo,llo>> it;
	x=b;
	llo y=a/gcd(a,b+1);
	/*if(y>1000000000000000000LL/b){

	}*/
	
/*	if((b+1)%a==0){
		x=b;
	}
	else{
		x=a*b;
	}*/


	llo aa,bb;
	llo ss=0;
	vector<pair<llo,llo>> ac;
	for(llo i=0;i<n;i++){
		cin>>aa>>bb;
		ss+=bb-aa+1;
		it.pb(mp(aa,bb));
	}
	if(x>(llo)2*(inf/b)){
		cout<<ss<<endl;
		return 0;
	}
	x*=(a/gcd(a,b+1));
	for(llo i=0;i<n;i++){
		aa=it[i].ak;
		bb=it[i].bk;
		if(bb-aa+1>=x){
			cout<<x<<endl;
			return 0;
		}
		/*if(bb-aa+1>=x){
			ac.pb(mp(0,x-1));
		}*/
		aa%=x;
		bb%=x;
		if(bb<aa){
			ac.pb(mp(aa,x-1));
			ac.pb(mp(0,bb));
		}
		else{
			ac.pb(mp(aa,bb));
		}

	}

/*	if(s==1){
		cout<<x<<endl;
	}
	else{*/
		vector<pair<llo,llo>> prev;
		sort(ac.begin(),ac.end());

		for(auto cc:ac){
			if(prev.size()==0){
				prev.pb(cc);
			}
			else{
				if(cc.ak>prev[prev.size()-1].bk){
					prev.pb(cc);
				}
				else{
					prev[prev.size()-1].bk=max(prev[prev.size()-1].bk,cc.bk);
				}
			}
		}
		llo tot=0;
		for(llo i=0;i<prev.size();i++){
			tot+=prev[i].bk-prev[i].ak+1;
		}
	/*	if(s==1 and tot<x){
			while(true){
				int y=1;
			}
		}
*/
		cout<<tot<<endl;
	//}













	return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:95:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(llo i=0;i<prev.size();i++){
               ~^~~~~~~~~~~~
strange_device.cpp:26:6: warning: unused variable 'y' [-Wunused-variable]
  llo y=a/gcd(a,b+1);
      ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 10 ms 1012 KB Output is correct
3 Correct 10 ms 1012 KB Output is correct
4 Correct 4 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 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 4 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 252 KB Output is correct
16 Correct 10 ms 1012 KB Output is correct
17 Correct 66 ms 6628 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 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 413 ms 40828 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 574 ms 56388 KB Output is correct
3 Correct 581 ms 56224 KB Output is correct
4 Correct 563 ms 56348 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 574 ms 56388 KB Output is correct
3 Correct 581 ms 56224 KB Output is correct
4 Correct 563 ms 56348 KB Output is correct
5 Correct 4 ms 376 KB Output is correct
6 Correct 575 ms 56480 KB Output is correct
7 Correct 579 ms 56480 KB Output is correct
8 Correct 572 ms 56352 KB Output is correct
9 Correct 607 ms 56352 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 574 ms 56388 KB Output is correct
3 Correct 581 ms 56224 KB Output is correct
4 Correct 563 ms 56348 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 61 ms 6628 KB Output is correct
7 Correct 63 ms 6504 KB Output is correct
8 Correct 59 ms 6504 KB Output is correct
9 Correct 60 ms 6636 KB Output is correct
10 Correct 59 ms 6500 KB Output is correct
11 Correct 60 ms 6500 KB Output is correct
12 Correct 62 ms 6500 KB Output is correct
13 Correct 63 ms 6500 KB Output is correct
14 Correct 60 ms 6628 KB Output is correct
15 Correct 65 ms 6500 KB Output is correct
16 Correct 65 ms 6500 KB Output is correct
17 Correct 64 ms 6628 KB Output is correct
18 Correct 580 ms 56332 KB Output is correct
19 Correct 572 ms 56496 KB Output is correct
20 Correct 623 ms 56352 KB Output is correct
21 Correct 65 ms 6500 KB Output is correct
22 Correct 63 ms 6624 KB Output is correct
23 Correct 178 ms 18004 KB Output is correct

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 63 ms 6500 KB Output is correct
3 Correct 64 ms 6500 KB Output is correct
4 Correct 648 ms 56360 KB Output is correct
5 Correct 50 ms 2544 KB Output is correct
6 Correct 48 ms 2540 KB Output is correct
7 Correct 49 ms 2544 KB Output is correct
8 Correct 64 ms 6500 KB Output is correct
9 Correct 62 ms 6504 KB Output is correct
10 Correct 64 ms 6532 KB Output is correct
11 Correct 63 ms 6500 KB Output is correct
12 Incorrect 50 ms 2544 KB Output isn't correct
13 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 10 ms 1012 KB Output is correct
3 Correct 10 ms 1012 KB Output is correct
4 Correct 4 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 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 4 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 252 KB Output is correct
16 Correct 10 ms 1012 KB Output is correct
17 Correct 66 ms 6628 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 376 KB Output is correct
26 Correct 5 ms 376 KB Output is correct
27 Correct 5 ms 376 KB Output is correct
28 Correct 413 ms 40828 KB Output is correct
29 Correct 5 ms 376 KB Output is correct
30 Correct 574 ms 56388 KB Output is correct
31 Correct 581 ms 56224 KB Output is correct
32 Correct 563 ms 56348 KB Output is correct
33 Correct 4 ms 376 KB Output is correct
34 Correct 575 ms 56480 KB Output is correct
35 Correct 579 ms 56480 KB Output is correct
36 Correct 572 ms 56352 KB Output is correct
37 Correct 607 ms 56352 KB Output is correct
38 Correct 5 ms 376 KB Output is correct
39 Correct 61 ms 6628 KB Output is correct
40 Correct 63 ms 6504 KB Output is correct
41 Correct 59 ms 6504 KB Output is correct
42 Correct 60 ms 6636 KB Output is correct
43 Correct 59 ms 6500 KB Output is correct
44 Correct 60 ms 6500 KB Output is correct
45 Correct 62 ms 6500 KB Output is correct
46 Correct 63 ms 6500 KB Output is correct
47 Correct 60 ms 6628 KB Output is correct
48 Correct 65 ms 6500 KB Output is correct
49 Correct 65 ms 6500 KB Output is correct
50 Correct 64 ms 6628 KB Output is correct
51 Correct 580 ms 56332 KB Output is correct
52 Correct 572 ms 56496 KB Output is correct
53 Correct 623 ms 56352 KB Output is correct
54 Correct 65 ms 6500 KB Output is correct
55 Correct 63 ms 6624 KB Output is correct
56 Correct 178 ms 18004 KB Output is correct
57 Correct 5 ms 376 KB Output is correct
58 Correct 63 ms 6500 KB Output is correct
59 Correct 64 ms 6500 KB Output is correct
60 Correct 648 ms 56360 KB Output is correct
61 Correct 50 ms 2544 KB Output is correct
62 Correct 48 ms 2540 KB Output is correct
63 Correct 49 ms 2544 KB Output is correct
64 Correct 64 ms 6500 KB Output is correct
65 Correct 62 ms 6504 KB Output is correct
66 Correct 64 ms 6532 KB Output is correct
67 Correct 63 ms 6500 KB Output is correct
68 Incorrect 50 ms 2544 KB Output isn't correct
69 Halted 0 ms 0 KB -