Submission #1130735

#	Time	Username	Problem	Language	Result	Execution time	Memory
1130735		Ludissey	Strange Device (APIO19_strange_device)	C++20	100 / 100	777 ms	94392 KiB

strange_device

#include <bits/stdc++.h>
#define int long long
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
 
using namespace std;

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int n,_a,b; cin >> n >> _a >> b;
    __uint128_t B=b;
    __uint128_t A=_a;
    vector<pair<int,int>> a(n);
    int lc=(A*B)/__gcd(A,(B+1)%A);
    __uint128_t step; 
    if(lc==0){
        step=B;
    }else {
        __uint128_t st=A;
        st/=__gcd(A,(B+1)%A);
        st=st*B;
        step=st;
    }
    int ostep=step;
    map<__uint128_t,int> mp;
    __uint128_t sm=0;
    for (int i = 0; i < n; i++)
    {
        int l,r; cin >> l >> r;
        a[i]={l,r};
        int lp=l%step;
        int rp=(r+1)%step;
        __uint128_t df=(r-l)+1;
        if(df>=step){
            sm=step;
        } else if(rp<lp){
            mp[0]++;
            mp[rp]--;
            mp[lp]++;
            mp[step]--;
        }
        else{
            mp[lp]++;
            mp[rp]--;
        }
    }
    int s=0;
    int last=-1;
    for (auto u : mp)
    {
        if(s>0){
            sm+=u.first-last;
        }
        s+=u.second;
        last=u.first;
    }
    int out=min(sm,step);
    cout << out << "\n";
    return 0;
}

• 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