Submission #708323

#	Time	Username	Problem	Language	Result	Execution time	Memory
708323		Alihan_8	Job Scheduling (CEOI12_jobs)	C++17	100 / 100	284 ms	20984 KiB

jobs

#include <bits/stdc++.h>
// include <ext/pb_ds/assoc_container.hpp>
// include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define all(x) x.begin(), x.end()
#define pb push_back
// define ordered_set tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>
#define mpr make_pair
#define ln '\n'
void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
#define int long long
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n, D, m; cin >> n >> D >> m;
    vector <pair<int,int>> p;
    for ( int i = 0; i < m; i++ ){
        int x; cin >> x;
        p.pb({x, i});
    }
    sort(all(p));
    auto ok = [&](int x){
        int i = 0, j = 0;
        for ( int day = 1; day <= n; day++ ){
            int K = x; j = i;
            while ( K > 0 and j < m and p[j].first <= day ){
                if ( p[j].first+D < day ) return false;
                j++; K--;
            }
            i = j;
        }
        return i == m;
    };
    int l = 1, r = 1e15;
    while ( l < r ){
        int md = (l+r) >> 1;
        if ( ok(md) ) r = md;
        else l = md+1;
    }
    cout << l << ln;
    int i = 0, j = 0;
    for ( int day = 1; day <= n; day++ ){
        int K = l; j = i;
        while ( j < m and K > 0 and p[j].first <= day ){
            cout << p[j].second+1 << ' ';
            j++; K--;
        }
        i = j;
        cout << "0\n";
    }

    cout << '\n';
}
/*
8 2 12
1 2 4 2 1 3 5 6 2 3 6 4
*/

Compilation message (stderr)

jobs.cpp: In function 'void IO(std::string)':
jobs.cpp:11:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jobs.cpp:11:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100