Submission #589597

#	Time	Username	Problem	Language	Result	Execution time	Memory
589597		Metal_Sonic	Job Scheduling (CEOI12_jobs)	C++17	100 / 100	409 ms	29812 KiB

jobs

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define sz(x) (int)(x).size()
#define all(x) x.begin() , x.end()
void Sonic(string name = "") {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    if(sz(name)){
        freopen((name+".in").c_str(), "r", stdin);
        freopen((name+".out").c_str(), "w", stdout);
    }
}
int n,d,jobs;
vector<pair<int,int>>vi;
pair<bool,vector<vector<int>>>check(int lim){
    vector<vector<int>>tmp(n);
    int cnt = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 0; j < lim; j++){
            if(vi[cnt].first > i)break;
            if(vi[cnt].first + d >= i)
                tmp[i-1].push_back(vi[cnt++].second);
            else return {false,tmp};
            if(cnt==jobs) return {true,tmp};
        }
    }
    return {false,tmp};
}
void run_test_case(){
    cin>>n>>d>>jobs;
    for(int i = 0; i < jobs; i++){
        int x;cin>>x;
        vi.emplace_back(x,i+1);
    }
    sort(all(vi));
    int l = 1, r = jobs;
    vector<vector<int>>ans;
    while(l<r){
        int mid = l + (r-l)/2;
        pair<bool,vector<vector<int>>>p = check(mid);
        if(p.first){
            r = mid;
            ans = p.second;
        }else l = mid+1;
    }
    cout<<l<<'\n';
    for(int i = 0; i < n; i++){
        for(int &it : ans[i])cout<<it<<" ";
        cout<<"0\n";
    }
}
int main(){
    Sonic();
    int T = 1;
    while(T--){
        run_test_case();
    }
    return 0;
}

Compilation message (stderr)

jobs.cpp: In function 'void Sonic(std::string)':
jobs.cpp:9:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |         freopen((name+".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jobs.cpp:10:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen((name+".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100