#include <bits/stdc++.h>
using namespace std ;
const long long inf = 4e18 ;
const int MAX = 1e5 + 10 ;
bool Overflow_Mul(long double x , long double y)
{
return (x * y > inf) ;
}
int arr[MAX] ;
int n ;
long long a , b ;
vector< pair<long long , long long> >vp ;
int main()
{
ios_base::sync_with_stdio(0) ;
cin.tie(0) ;
cin>>n>>a>>b ;
long long x = a / __gcd(a , b+1ll) ;
if(Overflow_Mul(x , b))
x = inf ;
else
x *= b ;
long long st = -1 ;
for(int i = 0 ; i < n ; ++i)
{
long long l , r ;
cin>>l>>r ;
if(r-l+1ll >= x)
return cout<<x<<"\n" , 0 ;
if((r % x) < (l % x))
st = max(st , (r % x)) , vp.emplace_back((l % x) , x-1ll) ;
else
vp.emplace_back((l % x) , (r % x)) ;
}
sort(vp.begin() , vp.end()) ;
long long ans = st+1ll , Max = st ;
for(auto &p : vp)
{
Max = max(Max , p.first - 1ll) ;
ans += max(0ll , p.second - Max) ;
Max = max(Max , p.second) ;
}
return cout<<ans<<"\n" , 0 ;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
6 ms |
976 KB |
Output is correct |
3 |
Correct |
6 ms |
1072 KB |
Output is correct |
4 |
Correct |
1 ms |
204 KB |
Output is correct |
5 |
Correct |
1 ms |
324 KB |
Output is correct |
6 |
Correct |
1 ms |
204 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
204 KB |
Output is correct |
9 |
Correct |
1 ms |
204 KB |
Output is correct |
10 |
Correct |
1 ms |
204 KB |
Output is correct |
11 |
Correct |
1 ms |
204 KB |
Output is correct |
12 |
Correct |
1 ms |
320 KB |
Output is correct |
13 |
Correct |
1 ms |
204 KB |
Output is correct |
14 |
Correct |
1 ms |
204 KB |
Output is correct |
15 |
Correct |
1 ms |
204 KB |
Output is correct |
16 |
Correct |
6 ms |
976 KB |
Output is correct |
17 |
Correct |
56 ms |
5628 KB |
Output is correct |
18 |
Correct |
1 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
320 KB |
Output is correct |
4 |
Correct |
1 ms |
320 KB |
Output is correct |
5 |
Correct |
1 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
359 ms |
22696 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
494 ms |
23076 KB |
Output is correct |
3 |
Correct |
497 ms |
23184 KB |
Output is correct |
4 |
Correct |
471 ms |
23148 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
494 ms |
23076 KB |
Output is correct |
3 |
Correct |
497 ms |
23184 KB |
Output is correct |
4 |
Correct |
471 ms |
23148 KB |
Output is correct |
5 |
Correct |
1 ms |
204 KB |
Output is correct |
6 |
Correct |
477 ms |
23128 KB |
Output is correct |
7 |
Correct |
482 ms |
25312 KB |
Output is correct |
8 |
Correct |
469 ms |
25264 KB |
Output is correct |
9 |
Correct |
546 ms |
25260 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
494 ms |
23076 KB |
Output is correct |
3 |
Correct |
497 ms |
23184 KB |
Output is correct |
4 |
Correct |
471 ms |
23148 KB |
Output is correct |
5 |
Correct |
1 ms |
204 KB |
Output is correct |
6 |
Correct |
47 ms |
5680 KB |
Output is correct |
7 |
Correct |
51 ms |
5708 KB |
Output is correct |
8 |
Correct |
47 ms |
5656 KB |
Output is correct |
9 |
Correct |
49 ms |
5716 KB |
Output is correct |
10 |
Correct |
47 ms |
5708 KB |
Output is correct |
11 |
Correct |
50 ms |
5692 KB |
Output is correct |
12 |
Correct |
47 ms |
5640 KB |
Output is correct |
13 |
Correct |
51 ms |
5688 KB |
Output is correct |
14 |
Correct |
48 ms |
5688 KB |
Output is correct |
15 |
Correct |
52 ms |
5680 KB |
Output is correct |
16 |
Correct |
55 ms |
5760 KB |
Output is correct |
17 |
Correct |
53 ms |
5720 KB |
Output is correct |
18 |
Correct |
494 ms |
23168 KB |
Output is correct |
19 |
Correct |
468 ms |
23192 KB |
Output is correct |
20 |
Correct |
528 ms |
23244 KB |
Output is correct |
21 |
Correct |
53 ms |
5616 KB |
Output is correct |
22 |
Correct |
46 ms |
5616 KB |
Output is correct |
23 |
Correct |
148 ms |
18404 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
55 ms |
5648 KB |
Output is correct |
3 |
Correct |
52 ms |
5692 KB |
Output is correct |
4 |
Correct |
548 ms |
23188 KB |
Output is correct |
5 |
Correct |
52 ms |
5856 KB |
Output is correct |
6 |
Correct |
51 ms |
5824 KB |
Output is correct |
7 |
Correct |
52 ms |
5636 KB |
Output is correct |
8 |
Correct |
53 ms |
5704 KB |
Output is correct |
9 |
Correct |
51 ms |
5640 KB |
Output is correct |
10 |
Correct |
53 ms |
5716 KB |
Output is correct |
11 |
Correct |
52 ms |
5688 KB |
Output is correct |
12 |
Correct |
46 ms |
5632 KB |
Output is correct |
13 |
Correct |
55 ms |
5688 KB |
Output is correct |
14 |
Correct |
531 ms |
23248 KB |
Output is correct |
15 |
Correct |
51 ms |
5692 KB |
Output is correct |
16 |
Correct |
474 ms |
23208 KB |
Output is correct |
17 |
Correct |
477 ms |
23348 KB |
Output is correct |
18 |
Correct |
1 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
6 ms |
976 KB |
Output is correct |
3 |
Correct |
6 ms |
1072 KB |
Output is correct |
4 |
Correct |
1 ms |
204 KB |
Output is correct |
5 |
Correct |
1 ms |
324 KB |
Output is correct |
6 |
Correct |
1 ms |
204 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
204 KB |
Output is correct |
9 |
Correct |
1 ms |
204 KB |
Output is correct |
10 |
Correct |
1 ms |
204 KB |
Output is correct |
11 |
Correct |
1 ms |
204 KB |
Output is correct |
12 |
Correct |
1 ms |
320 KB |
Output is correct |
13 |
Correct |
1 ms |
204 KB |
Output is correct |
14 |
Correct |
1 ms |
204 KB |
Output is correct |
15 |
Correct |
1 ms |
204 KB |
Output is correct |
16 |
Correct |
6 ms |
976 KB |
Output is correct |
17 |
Correct |
56 ms |
5628 KB |
Output is correct |
18 |
Correct |
1 ms |
204 KB |
Output is correct |
19 |
Correct |
1 ms |
204 KB |
Output is correct |
20 |
Correct |
1 ms |
204 KB |
Output is correct |
21 |
Correct |
1 ms |
320 KB |
Output is correct |
22 |
Correct |
1 ms |
320 KB |
Output is correct |
23 |
Correct |
1 ms |
204 KB |
Output is correct |
24 |
Correct |
1 ms |
204 KB |
Output is correct |
25 |
Correct |
1 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
332 KB |
Output is correct |
27 |
Correct |
1 ms |
332 KB |
Output is correct |
28 |
Correct |
359 ms |
22696 KB |
Output is correct |
29 |
Correct |
1 ms |
204 KB |
Output is correct |
30 |
Correct |
494 ms |
23076 KB |
Output is correct |
31 |
Correct |
497 ms |
23184 KB |
Output is correct |
32 |
Correct |
471 ms |
23148 KB |
Output is correct |
33 |
Correct |
1 ms |
204 KB |
Output is correct |
34 |
Correct |
477 ms |
23128 KB |
Output is correct |
35 |
Correct |
482 ms |
25312 KB |
Output is correct |
36 |
Correct |
469 ms |
25264 KB |
Output is correct |
37 |
Correct |
546 ms |
25260 KB |
Output is correct |
38 |
Correct |
1 ms |
204 KB |
Output is correct |
39 |
Correct |
47 ms |
5680 KB |
Output is correct |
40 |
Correct |
51 ms |
5708 KB |
Output is correct |
41 |
Correct |
47 ms |
5656 KB |
Output is correct |
42 |
Correct |
49 ms |
5716 KB |
Output is correct |
43 |
Correct |
47 ms |
5708 KB |
Output is correct |
44 |
Correct |
50 ms |
5692 KB |
Output is correct |
45 |
Correct |
47 ms |
5640 KB |
Output is correct |
46 |
Correct |
51 ms |
5688 KB |
Output is correct |
47 |
Correct |
48 ms |
5688 KB |
Output is correct |
48 |
Correct |
52 ms |
5680 KB |
Output is correct |
49 |
Correct |
55 ms |
5760 KB |
Output is correct |
50 |
Correct |
53 ms |
5720 KB |
Output is correct |
51 |
Correct |
494 ms |
23168 KB |
Output is correct |
52 |
Correct |
468 ms |
23192 KB |
Output is correct |
53 |
Correct |
528 ms |
23244 KB |
Output is correct |
54 |
Correct |
53 ms |
5616 KB |
Output is correct |
55 |
Correct |
46 ms |
5616 KB |
Output is correct |
56 |
Correct |
148 ms |
18404 KB |
Output is correct |
57 |
Correct |
1 ms |
204 KB |
Output is correct |
58 |
Correct |
55 ms |
5648 KB |
Output is correct |
59 |
Correct |
52 ms |
5692 KB |
Output is correct |
60 |
Correct |
548 ms |
23188 KB |
Output is correct |
61 |
Correct |
52 ms |
5856 KB |
Output is correct |
62 |
Correct |
51 ms |
5824 KB |
Output is correct |
63 |
Correct |
52 ms |
5636 KB |
Output is correct |
64 |
Correct |
53 ms |
5704 KB |
Output is correct |
65 |
Correct |
51 ms |
5640 KB |
Output is correct |
66 |
Correct |
53 ms |
5716 KB |
Output is correct |
67 |
Correct |
52 ms |
5688 KB |
Output is correct |
68 |
Correct |
46 ms |
5632 KB |
Output is correct |
69 |
Correct |
55 ms |
5688 KB |
Output is correct |
70 |
Correct |
531 ms |
23248 KB |
Output is correct |
71 |
Correct |
51 ms |
5692 KB |
Output is correct |
72 |
Correct |
474 ms |
23208 KB |
Output is correct |
73 |
Correct |
477 ms |
23348 KB |
Output is correct |
74 |
Correct |
1 ms |
204 KB |
Output is correct |
75 |
Correct |
1 ms |
204 KB |
Output is correct |
76 |
Correct |
1 ms |
204 KB |
Output is correct |
77 |
Correct |
1 ms |
204 KB |
Output is correct |
78 |
Correct |
1 ms |
204 KB |
Output is correct |
79 |
Correct |
6 ms |
976 KB |
Output is correct |
80 |
Correct |
550 ms |
22184 KB |
Output is correct |
81 |
Correct |
551 ms |
22372 KB |
Output is correct |
82 |
Correct |
521 ms |
22444 KB |
Output is correct |
83 |
Correct |
520 ms |
22416 KB |
Output is correct |
84 |
Correct |
525 ms |
22392 KB |
Output is correct |
85 |
Correct |
523 ms |
22436 KB |
Output is correct |
86 |
Correct |
148 ms |
18440 KB |
Output is correct |
87 |
Correct |
1 ms |
332 KB |
Output is correct |