| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 1318522 | ttamx | 이상한 기계 (APIO19_strange_device) | C++20 | 640 ms | 63072 KiB |
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const ll LIM=1e18;
int main(){
cin.tie(nullptr)->sync_with_stdio(false);
int n;
ll a,b;
cin >> n >> a >> b;
ll c=b*min(a/gcd(a,b+1),LIM/b+1);
map<ll,int> mp;
auto insert=[&](ll l,ll r){
mp[l]++;
mp[r+1]--;
};
while(n--){
ll l,r;
cin >> l >> r;
if(r-l+1>=c)insert(0,c-1);
else{
l%=c,r%=c;
if(l<=r)insert(l,r);
else insert(0,r),insert(l,c-1);
}
}
ll ans=0,bal=0,last=0;
for(auto [x,v]:mp){
if(bal>0)ans+=x-last;
last=x;
bal+=v;
}
cout << ans << "\n";
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