Submission #1043802

#	Time	Username	Problem	Language	Result	Execution time	Memory
1043802		dpsaveslives	Job Scheduling (CEOI12_jobs)	C++17	80 / 100	1076 ms	30800 KiB

jobs

#include <bits/stdc++.h>
#define f first
#define s second
using namespace std;
const int MAXN = 1e5+10;
vector<int> sched[MAXN];
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N,D,M; cin >> N >> D >> M;
    vector<pair<int,int>> times(M);
    for(int i = 0;i<M;++i){
        cin >> times[i].f;
        times[i].s = i+1;
    }
    sort(times.begin(),times.end());
    int lo = 1, hi = M; ++hi;
    while(lo < hi){
        int mid = lo+(hi-lo)/2;
        multiset<int> machines;
        for(int i = 0;i<mid;++i) machines.insert(0);
        bool good = true;
        for(int i = 0;i<times.size();++i){
            int val = *(machines.begin());
            if(val+1 < times[i].f){
                val = times[i].f-1;
            }
            if(val+1 > times[i].f+D){
                good = false;
                break;
            }
            machines.insert(val+1);
            machines.erase(machines.begin());
        }
        if(good){
            hi = mid;
        }
        else{
            lo = mid+1;
        }
    }
    cout << lo << "\n";
    multiset<int> machines;
    for(int i = 0;i<lo;++i) machines.insert(0);
    for(int i = 0;i<times.size();++i){
        int val = *(machines.begin());
        if(val+1 < times[i].f){
            val = times[i].f-1;
        }
        machines.insert(val+1);
        sched[val+1].push_back(times[i].s);
        machines.erase(machines.begin());
    }
    for(int i = 1;i<=N;++i){
        if(sched[i].size() == 0){
            cout << 0 << "\n";
            continue;
        }
        for(int j = 0;j<sched[i].size();++j){
            cout << sched[i][j] << " ";
        }
        cout << 0 << "\n";
    }
    return 0;
}

Compilation message (stderr)

jobs.cpp: In function 'int main()':
jobs.cpp:23:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for(int i = 0;i<times.size();++i){
      |                       ~^~~~~~~~~~~~~
jobs.cpp:45:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i = 0;i<times.size();++i){
      |                   ~^~~~~~~~~~~~~
jobs.cpp:59:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |         for(int j = 0;j<sched[i].size();++j){
      |                       ~^~~~~~~~~~~~~~~~

• Subtask 1: 80 / 100