#include<bits/stdc++.h>
#define overload(a,b,c,d,...) d
#define rep1(a) for(ll _=0;_<(ll)a;++_)
#define rep2(i,a) for(ll i=0;i<(ll)a;++i)
#define rep3(i,a,b) for(ll i=a;i<(ll)b;++i)
#define rep(...) overload(__VA_ARGS__,rep3,rep2,rep1)(__VA_ARGS__)
#define rrep1(i,a) for(ll i=(ll)a-1;i>=0;--i)
#define rrep2(i,a,b) for(ll i=(ll)b-1;i>=(ll)a;--i)
#define rrep(...) overload(__VA_ARGS__,rrep2,rrep1)(__VA_ARGS__)
#define all(a) a.begin(),a.end()
#define lb(v,x) lower_bound(all(v),x);
#define ub(v,x) upper_bound(all(v),x);
using namespace std;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
template<typename T,typename U>
inline bool chmin(T&a,const U&b){return (a>b?a=b,true:false);}
template<typename T,typename U>
inline bool chmax(T&a,const U&b){return (a<b?a=b,true:false);}
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n;cin>>n;
ll a,b;cin>>a>>b;
ll g=gcd(a,b+1);
if((ld)(1e18)/(ld)b<(ld)a/(ld)g){
ll ans=0;
rep(i,n){
ll l,r;cin>>l>>r;
ans+=r-l+1;
}
cout<<ans<<endl;return 0;
}
vector<pair<ll,ll>>v;
ll md=a/g*b;
rep(i,n){
ll l,r;cin>>l>>r;
r++;
if(r-l>=md){
cout<<md<<endl;return 0;
}
l%=md,r%=md;
if(l>r){
v.emplace_back(l,1);
v.emplace_back(md,-1);
v.emplace_back(0,1);
v.emplace_back(r,-1);
}
else{
v.emplace_back(l,1);
v.emplace_back(r,-1);
}
}
sort(all(v));
ll ans=0,cnt=1;
rep(i,1,v.size()){
if(cnt>0){
ans+=v[i].first-v[i-1].first;
}
cnt+=v[i].second;
}
cout<<ans<<endl;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
260 KB |
Output is correct |
2 |
Correct |
5 ms |
1240 KB |
Output is correct |
3 |
Correct |
6 ms |
1232 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
316 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
320 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
340 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
1 ms |
340 KB |
Output is correct |
5 |
Correct |
337 ms |
56944 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Incorrect |
529 ms |
68868 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Incorrect |
529 ms |
68868 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Incorrect |
529 ms |
68868 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
53 ms |
7288 KB |
Output is correct |
3 |
Correct |
68 ms |
7316 KB |
Output is correct |
4 |
Correct |
625 ms |
68984 KB |
Output is correct |
5 |
Correct |
56 ms |
7220 KB |
Output is correct |
6 |
Correct |
54 ms |
7200 KB |
Output is correct |
7 |
Correct |
55 ms |
7276 KB |
Output is correct |
8 |
Correct |
58 ms |
7264 KB |
Output is correct |
9 |
Correct |
57 ms |
7256 KB |
Output is correct |
10 |
Correct |
55 ms |
7192 KB |
Output is correct |
11 |
Correct |
53 ms |
7380 KB |
Output is correct |
12 |
Correct |
50 ms |
7236 KB |
Output is correct |
13 |
Correct |
60 ms |
7228 KB |
Output is correct |
14 |
Correct |
610 ms |
68964 KB |
Output is correct |
15 |
Correct |
70 ms |
7256 KB |
Output is correct |
16 |
Correct |
481 ms |
68988 KB |
Output is correct |
17 |
Correct |
496 ms |
68960 KB |
Output is correct |
18 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
260 KB |
Output is correct |
2 |
Correct |
5 ms |
1240 KB |
Output is correct |
3 |
Correct |
6 ms |
1232 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
316 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |