제출 #1339625

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1339625		danglayloi1	Strange Device (APIO19_strange_device)	C++20	100 / 100	339 ms	16976 KiB

strange_device

#include <bits/stdc++.h>
#define ii pair<int, int>
#define fi first
#define se second
#define inf 0x3f3f3f3f3f3f3f3f
using namespace std;
using ll = long long;
const ll mod=1e9+7;
const ll lim=1e18;
int n;
ll A, B, res=0;
vector<pair<ll, ll>> ve;
pair<ll, ll> cur={-1, -2};
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n>>A>>B;
    A/=__gcd(A, B+1);
    if(A>lim/B-1)
    {
        while(n--)
        {
            ll l, r;
            cin>>l>>r;
            res+=r-l+1;
        }
        return cout<<res, 0;
    }
    A*=B;
    while(n--)
    {
        ll l, r;
        cin>>l>>r;
        if(r/A-l/A<=1)
        {
            l%=A;
            r%=A;
            if(l<=r) ve.emplace_back(l, r);
            else
            {
                ve.emplace_back(0, r);
                ve.emplace_back(l, A-1);
            }
        }
        else ve.emplace_back(0, A-1);
    }
    sort(ve.begin(), ve.end());
    for(auto it:ve)
    {
        if(it.fi>cur.se+1)
        {
            res+=cur.se-cur.fi+1;
            cur=it;
        }
        else cur.se=max(cur.se, it.se);
    }
    res+=cur.se-cur.fi+1;
    cout<<res;
}

• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20
• Subtask 8: 30 / 30