Submission #743125

#	Time	Username	Problem	Language	Result	Execution time	Memory
743125		vjudge1	Job Scheduling (CEOI12_jobs)	C++17	0 / 100	1076 ms	14948 KiB

jobs

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

const int N = 1e5+1;
int n,d,m;

struct job
{
    int dline,idx;

    bool operator <(const job &x)const{
        if(dline != x.dline) return dline > x.dline;
        return idx > x.idx;
    }
};

int ans;
vector<int> path;
priority_queue<job> pq;
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n >> d >> m;
    for(int i=1;i<=m;++i)
    {
        int x;
        cin >> x;
        x += d;
        pq.push({x,i});
    }
//    while(!pq.empty())
//    {
//        cout << pq.top().dline << " " << pq.top().idx << '\n';
//        pq.pop();
//    }
    int l = 1,r = n;
    while(l<=r)
    {
        priority_queue<job> tmp = pq;
        int mid = (l+r)/2;
//        cout << "mid = " << mid << '\n';
        bool all = true;
        bool cant = false;
        int cnt=0;
        for(int i=1;i<=n;++i)
        {
            for(int j=1;j<=mid;++j)
            {
//                cout << "day = " << i << " deadline now " << tmp.top().dline << '\n';
                if(i > tmp.top().dline)
                {
                    cant = true;
                    break;
                }
                if(!tmp.empty()) tmp.pop();
            }
            if(cant) break;
        }
        if((!cant) && tmp.empty())
        {
            r = mid-1;
            ans = mid;
        }
        else l = mid+1;
//        cout << "\n\n";
    }
    cout << ans << '\n';
//    int d = 0;
//    while(!pq.empty())
//    {
//        for(int i=1;i<=ans;++i)
//        {
//            cout << pq.top().idx << " ";
//            pq.pop();
//        }
//        ++d;
//        cout << "0\n";
//    }
//    while(d < n)
//    {
//        cout << "0\n";
//        d++;
//    }
    return 0;
}

Compilation message (stderr)

jobs.cpp: In function 'int main()':
jobs.cpp:42:14: warning: unused variable 'all' [-Wunused-variable]
   42 |         bool all = true;
      |              ^~~
jobs.cpp:44:13: warning: unused variable 'cnt' [-Wunused-variable]
   44 |         int cnt=0;
      |             ^~~

• Subtask 1: 0 / 100