///In the name of GOD
//#pragma GCC optimize("O2")
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll MXN = 4e6 + 10;
const ll INF = 1e18;
ll n, A, B, g, k, m;
ll L[MXN], R[MXN], cnt[MXN];
vector<ll> Num;
vector<pair<ll, ll>> seg;
inline int GetId(ll x){
return lower_bound(Num.begin(), Num.end(), x) - Num.begin();
}
int main(){
ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
cin >> n >> A >> B;
g = __gcd(A, B + 1);
k = (A / g);
m = (k > (INF + B - 1) / B ? INF + 1 : k * B);
for(int i = 1; i <= n; i ++){
cin >> L[i] >> R[i];
if(R[i] - L[i] + 1 >= m) return cout << m, 0;
L[i] %= m, R[i] %= m;
Num.push_back(L[i]), Num.push_back(R[i]), Num.push_back(R[i] + 1);
if(R[i] < L[i]){
seg.push_back({L[i], m - 1});
seg.push_back({0, R[i]});
}
else{
seg.push_back({L[i], R[i]});
}
}
Num.push_back(0), Num.push_back(m - 1);
Num.push_back(1), Num.push_back(m);
sort(Num.begin(), Num.end());
Num.resize(unique(Num.begin(), Num.end()) - Num.begin());
sort(seg.begin(), seg.end());
for(auto LR : seg){
ll l, r; tie(l, r) = LR;
cnt[GetId(l)] ++, cnt[GetId(r + 1)] --;
}
ll ans = 0, bal = 0, len;
for(int i = 0; i < Num.size() - 1; i ++){
len = (Num[i + 1] - 1) - Num[i] + 1;
bal += cnt[i];
assert(bal >= 0);
if(bal > 0) ans += len;
}
cout << ans << '\n';
return 0;
}
/*!
HE'S AN INSTIGATOR,
ENEMY ELIMINATOR,
AND WHEN HE KNOCKS YOU BETTER
YOU BETTER LET HIM IN.
*/
//! N.N
Compilation message
strange_device.cpp: In function 'int main()':
strange_device.cpp:45:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
45 | for(int i = 0; i < Num.size() - 1; i ++){
| ~~^~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
9 ms |
1640 KB |
Output is correct |
3 |
Correct |
9 ms |
1640 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
512 KB |
Output is correct |
12 |
Correct |
1 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
364 KB |
Output is correct |
14 |
Correct |
1 ms |
364 KB |
Output is correct |
15 |
Correct |
1 ms |
364 KB |
Output is correct |
16 |
Correct |
8 ms |
1640 KB |
Output is correct |
17 |
Correct |
102 ms |
10064 KB |
Output is correct |
18 |
Correct |
1 ms |
384 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
492 KB |
Output is correct |
3 |
Correct |
1 ms |
492 KB |
Output is correct |
4 |
Correct |
2 ms |
492 KB |
Output is correct |
5 |
Correct |
450 ms |
55648 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
372 KB |
Output is correct |
2 |
Correct |
867 ms |
63604 KB |
Output is correct |
3 |
Correct |
948 ms |
71588 KB |
Output is correct |
4 |
Correct |
870 ms |
71392 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
372 KB |
Output is correct |
2 |
Correct |
867 ms |
63604 KB |
Output is correct |
3 |
Correct |
948 ms |
71588 KB |
Output is correct |
4 |
Correct |
870 ms |
71392 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
858 ms |
71788 KB |
Output is correct |
7 |
Correct |
885 ms |
63840 KB |
Output is correct |
8 |
Correct |
907 ms |
71524 KB |
Output is correct |
9 |
Correct |
1121 ms |
71972 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
372 KB |
Output is correct |
2 |
Correct |
867 ms |
63604 KB |
Output is correct |
3 |
Correct |
948 ms |
71588 KB |
Output is correct |
4 |
Correct |
870 ms |
71392 KB |
Output is correct |
5 |
Correct |
1 ms |
512 KB |
Output is correct |
6 |
Correct |
87 ms |
11296 KB |
Output is correct |
7 |
Correct |
94 ms |
11336 KB |
Output is correct |
8 |
Correct |
90 ms |
11372 KB |
Output is correct |
9 |
Correct |
91 ms |
11336 KB |
Output is correct |
10 |
Correct |
83 ms |
11336 KB |
Output is correct |
11 |
Correct |
88 ms |
11336 KB |
Output is correct |
12 |
Correct |
83 ms |
11336 KB |
Output is correct |
13 |
Correct |
105 ms |
11336 KB |
Output is correct |
14 |
Correct |
95 ms |
11336 KB |
Output is correct |
15 |
Correct |
107 ms |
11336 KB |
Output is correct |
16 |
Correct |
100 ms |
11376 KB |
Output is correct |
17 |
Correct |
94 ms |
11336 KB |
Output is correct |
18 |
Correct |
899 ms |
72032 KB |
Output is correct |
19 |
Correct |
889 ms |
71952 KB |
Output is correct |
20 |
Correct |
1080 ms |
71776 KB |
Output is correct |
21 |
Correct |
102 ms |
11336 KB |
Output is correct |
22 |
Correct |
97 ms |
11336 KB |
Output is correct |
23 |
Correct |
185 ms |
31916 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
99 ms |
11336 KB |
Output is correct |
3 |
Correct |
101 ms |
11336 KB |
Output is correct |
4 |
Correct |
1147 ms |
71532 KB |
Output is correct |
5 |
Correct |
99 ms |
11336 KB |
Output is correct |
6 |
Correct |
100 ms |
11336 KB |
Output is correct |
7 |
Correct |
99 ms |
11336 KB |
Output is correct |
8 |
Correct |
114 ms |
11336 KB |
Output is correct |
9 |
Correct |
97 ms |
11464 KB |
Output is correct |
10 |
Correct |
103 ms |
11336 KB |
Output is correct |
11 |
Correct |
98 ms |
11464 KB |
Output is correct |
12 |
Correct |
87 ms |
11468 KB |
Output is correct |
13 |
Correct |
102 ms |
11336 KB |
Output is correct |
14 |
Correct |
1091 ms |
108384 KB |
Output is correct |
15 |
Correct |
103 ms |
11336 KB |
Output is correct |
16 |
Correct |
888 ms |
108528 KB |
Output is correct |
17 |
Correct |
862 ms |
108388 KB |
Output is correct |
18 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
9 ms |
1640 KB |
Output is correct |
3 |
Correct |
9 ms |
1640 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
512 KB |
Output is correct |
12 |
Correct |
1 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
364 KB |
Output is correct |
14 |
Correct |
1 ms |
364 KB |
Output is correct |
15 |
Correct |
1 ms |
364 KB |
Output is correct |
16 |
Correct |
8 ms |
1640 KB |
Output is correct |
17 |
Correct |
102 ms |
10064 KB |
Output is correct |
18 |
Correct |
1 ms |
384 KB |
Output is correct |
19 |
Correct |
1 ms |
364 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
1 ms |
364 KB |
Output is correct |
22 |
Correct |
1 ms |
364 KB |
Output is correct |
23 |
Correct |
1 ms |
364 KB |
Output is correct |
24 |
Correct |
1 ms |
364 KB |
Output is correct |
25 |
Correct |
1 ms |
492 KB |
Output is correct |
26 |
Correct |
1 ms |
492 KB |
Output is correct |
27 |
Correct |
2 ms |
492 KB |
Output is correct |
28 |
Correct |
450 ms |
55648 KB |
Output is correct |
29 |
Correct |
1 ms |
372 KB |
Output is correct |
30 |
Correct |
867 ms |
63604 KB |
Output is correct |
31 |
Correct |
948 ms |
71588 KB |
Output is correct |
32 |
Correct |
870 ms |
71392 KB |
Output is correct |
33 |
Correct |
1 ms |
364 KB |
Output is correct |
34 |
Correct |
858 ms |
71788 KB |
Output is correct |
35 |
Correct |
885 ms |
63840 KB |
Output is correct |
36 |
Correct |
907 ms |
71524 KB |
Output is correct |
37 |
Correct |
1121 ms |
71972 KB |
Output is correct |
38 |
Correct |
1 ms |
512 KB |
Output is correct |
39 |
Correct |
87 ms |
11296 KB |
Output is correct |
40 |
Correct |
94 ms |
11336 KB |
Output is correct |
41 |
Correct |
90 ms |
11372 KB |
Output is correct |
42 |
Correct |
91 ms |
11336 KB |
Output is correct |
43 |
Correct |
83 ms |
11336 KB |
Output is correct |
44 |
Correct |
88 ms |
11336 KB |
Output is correct |
45 |
Correct |
83 ms |
11336 KB |
Output is correct |
46 |
Correct |
105 ms |
11336 KB |
Output is correct |
47 |
Correct |
95 ms |
11336 KB |
Output is correct |
48 |
Correct |
107 ms |
11336 KB |
Output is correct |
49 |
Correct |
100 ms |
11376 KB |
Output is correct |
50 |
Correct |
94 ms |
11336 KB |
Output is correct |
51 |
Correct |
899 ms |
72032 KB |
Output is correct |
52 |
Correct |
889 ms |
71952 KB |
Output is correct |
53 |
Correct |
1080 ms |
71776 KB |
Output is correct |
54 |
Correct |
102 ms |
11336 KB |
Output is correct |
55 |
Correct |
97 ms |
11336 KB |
Output is correct |
56 |
Correct |
185 ms |
31916 KB |
Output is correct |
57 |
Correct |
1 ms |
364 KB |
Output is correct |
58 |
Correct |
99 ms |
11336 KB |
Output is correct |
59 |
Correct |
101 ms |
11336 KB |
Output is correct |
60 |
Correct |
1147 ms |
71532 KB |
Output is correct |
61 |
Correct |
99 ms |
11336 KB |
Output is correct |
62 |
Correct |
100 ms |
11336 KB |
Output is correct |
63 |
Correct |
99 ms |
11336 KB |
Output is correct |
64 |
Correct |
114 ms |
11336 KB |
Output is correct |
65 |
Correct |
97 ms |
11464 KB |
Output is correct |
66 |
Correct |
103 ms |
11336 KB |
Output is correct |
67 |
Correct |
98 ms |
11464 KB |
Output is correct |
68 |
Correct |
87 ms |
11468 KB |
Output is correct |
69 |
Correct |
102 ms |
11336 KB |
Output is correct |
70 |
Correct |
1091 ms |
108384 KB |
Output is correct |
71 |
Correct |
103 ms |
11336 KB |
Output is correct |
72 |
Correct |
888 ms |
108528 KB |
Output is correct |
73 |
Correct |
862 ms |
108388 KB |
Output is correct |
74 |
Correct |
1 ms |
364 KB |
Output is correct |
75 |
Correct |
1 ms |
364 KB |
Output is correct |
76 |
Correct |
1 ms |
364 KB |
Output is correct |
77 |
Correct |
1 ms |
364 KB |
Output is correct |
78 |
Correct |
1 ms |
364 KB |
Output is correct |
79 |
Correct |
8 ms |
1640 KB |
Output is correct |
80 |
Correct |
1161 ms |
108288 KB |
Output is correct |
81 |
Correct |
1153 ms |
108256 KB |
Output is correct |
82 |
Correct |
1076 ms |
108408 KB |
Output is correct |
83 |
Correct |
1067 ms |
108236 KB |
Output is correct |
84 |
Correct |
1071 ms |
108400 KB |
Output is correct |
85 |
Correct |
1051 ms |
108384 KB |
Output is correct |
86 |
Correct |
183 ms |
31788 KB |
Output is correct |
87 |
Correct |
1 ms |
364 KB |
Output is correct |