Submission #480509

#	Time	Username	Problem	Language	Result	Execution time	Memory
480509		imaginary_unit	Job Scheduling (CEOI12_jobs)	C++17	60 / 100	676 ms	20060 KiB

jobs

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define fi first
#define se second
using namespace std;

int n, d, m, temp;
vector<vector<int> > a(100'000);

bool ok(int mch)
{
    priority_queue<int, vector<int>, greater<int> > pq;
    for(int i=1; i<=n; i++){
        for(int j=0; j<a[i].size(); j++){
            pq.push(i+d);
        }
        for(int j=0; j<mch; j++){
            if(pq.empty()){
                break;
            }
            if(pq.top() < i){
                return 0;
            }
            pq.pop();
        }
    }
    return 1;
}

int minMachines(int l, int r)
{
    while(r-l>1){
        int m=(l+r)/2;
        if(ok(m)){
            r=m;
        }
        else{
            l=m;
        }
    }
    return r;
}

int main()
{
    //freopen("angry.in", "r", stdin);
    //freopen("angry.out", "w", stdout);

    scanf("%d %d %d", &n, &d, &m);
    for(int i=1; i<=m; i++){
        scanf("%d", &temp);
        a[temp].push_back(i);
    }
    int ans=minMachines(1, n);
    cout << ans << '\n';
    vector<vector<int> > tasks(n+1);
    priority_queue<pii, vector<pii>, greater<pii> > pq;
    for(int i=1; i<=n; i++){
        for(int j=0; j<a[i].size(); j++){
            pq.push({i+d, a[i][j]});
        }
        for(int j=0; j<ans; j++){
            if(pq.empty()){
                break;
            }
            tasks[i].push_back(pq.top().se);
            pq.pop();
        }
    }
    for(int i=1; i<=n; i++){
        for(int j=0; j<tasks[i].size(); j++){
            cout << tasks[i][j] << ' ';
        }
        cout << 0 << '\n';
    }
    return 0;
}

Compilation message (stderr)

jobs.cpp: In function 'bool ok(int)':
jobs.cpp:15:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |         for(int j=0; j<a[i].size(); j++){
      |                      ~^~~~~~~~~~~~
jobs.cpp: In function 'int main()':
jobs.cpp:60:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         for(int j=0; j<a[i].size(); j++){
      |                      ~^~~~~~~~~~~~
jobs.cpp:72:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |         for(int j=0; j<tasks[i].size(); j++){
      |                      ~^~~~~~~~~~~~~~~~
jobs.cpp:50:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |     scanf("%d %d %d", &n, &d, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
jobs.cpp:52:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         scanf("%d", &temp);
      |         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 60 / 100