Submission #556847

#	Time	Username	Problem	Language	Result	Execution time	Memory
556847		Jomnoi	Job Scheduling (CEOI12_jobs)	C++17	100 / 100	212 ms	13840 KiB

jobs

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

const int MAX_M = 1e6 + 10;

int N, D, M;
int S[MAX_M], id[MAX_M];

bool solve(int mid) {
    int i = 1;
    for(int days = 1; days <= N and i <= M; days++) {
        if(days > S[id[i]] + D) {
            break;
        }

        int cnt = mid;
        while(i <= M and S[id[i]] <= days and cnt--) {
            i++;
        }
    }
    return i == M + 1;
}

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> N >> D >> M;
    for(int i = 1; i <= M; i++) {
        cin >> S[i];
        id[i] = i;
    }

    sort(id + 1, id + M + 1, [&](const int &a, const int &b) {
        return S[a] < S[b];
    });

    int l = 1, r = M, ans = -1;
    while(l <= r) {
        int mid = (l + r) / 2;

        if(solve(mid) == true) {
            ans = mid;
            r = mid - 1;
        }
        else {
            l = mid + 1;
        }
    }

    cout << ans << '\n';
    for(int i = 1, j = 1; i <= N; i++) {
        for(int k = 0; j <= M and k < ans; j++, k++) {
            cout << id[j] << ' ';
        }
        cout << "0\n";
    }
    return 0;
}

• Subtask 1: 100 / 100