Submission #1182725

#	Time	Username	Problem	Language	Result	Execution time	Memory
1182725		Dedibeat	Room Temperature (JOI24_ho_t1)	C++20	85 / 100	2095 ms	74144 KiB

Main

#include<bits/stdc++.h>
using namespace std;
using ll = long long;

#define F first
#define S second 
#define all(x) (x).begin(), (x).end()

template<typename T, typename U>
ostream &operator<<(ostream &os, const pair<T, U> &p)
{
    return os << "(" << p.F << "," << p.S << ")";
}
template<typename T>
void print(const T &v, int lim = 1e9)
{
    for(auto x : v) 
        if(lim-- > 0) cout << x << " ";
    cout << "\n";
}
#define int long long
int N, T;
signed main()
{
    ios::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL);
    cin >> N >> T;
    vector<int> a(N);
    for(int &x : a) cin >> x;
    auto check = [&](int mid)
    {
        vector<pair<int, int>> valid_ranges;
        vector<int> reg(N);
        int cnt = 0;
        for(int i = 0; i < N; i++)
        {
            for(int j = -1; j <= 1; j++)
            {
                int y = a[i] % T + j * T;
                valid_ranges.emplace_back(y - mid, -i - 1);
                valid_ranges.emplace_back(y + mid, i + 1);
            }
        }
        sort(valid_ranges.begin(), valid_ranges.end());
        for(auto &[l, id] : valid_ranges)
        {
        //    cout << l << " " << abs(id) - 1 << "\n";
            if(id > 0)
            {
                if(reg[id - 1] == 1) cnt--;
                reg[id - 1]--;
            }
            else 
            {
                if(reg[-1 - id] == 0) cnt++;
                reg[-1 - id]++;
            }
          //  print(reg);
         //   cout << cnt << "\n";
            if(cnt == N) return 1;
        }
        return 0;
    };
    int l = -1, r = 1e9;
    //check(1);
    //return 0;
    while(l + 1 < r)
    {
        int mid = (l + r) / 2;
        if(check(mid)) r = mid;
        else l = mid;
    }

    cout << r << "\n";
 
    
}

• Subtask 1: 15 / 15
• Subtask 2: 5 / 5
• Subtask 3: 30 / 30
• Subtask 4: 35 / 35
• Subtask 5: 0 / 15