Submission #1264022

#	Time	Username	Problem	Language	Result	Execution time	Memory
1264022		mingga	Job Scheduling (CEOI12_jobs)	C++20	100 / 100	202 ms	27608 KiB

jobs

// Author: caption_mingle
#include "bits/stdc++.h"

using namespace std;

#define ln "\n"
#define pb push_back
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define ll long long
const int mod = 1e9 + 7;
const int inf = 2e9;
const int N = 1e5 + 7;
const int M = 1e6 + 7;
int n, d, m;
pair<int, int> a[M];
int cnt[M], tar[M];
vector<int> ev[N];

bool check(int mid) {
	memset(cnt, 0, sizeof cnt);
	int cur = 1;
	for(int i = 1; i <= m; i++) {
		if(a[i].fi > cur) {
			cur = a[i].fi;
			cnt[cur] = 1;
			tar[i] = cur;
		} else {
			if(cnt[cur] == mid) {
				cur++;
			}
			cnt[cur]++;
			tar[i] = cur;
			if(cur - a[i].fi > d) return 0;
		}
	}
	return 1;
}

signed main() {
	cin.tie(0) -> sync_with_stdio(0);
	#define task ""
	if(fopen(task ".INP", "r")) {
		freopen(task ".INP", "r", stdin);
		freopen(task ".OUT", "w", stdout);
	}
	cin >> n >> d >> m;
	for(int i = 1; i <= m; i++) {
		cin >> a[i].fi;
		a[i].se = i;
	}
	sort(a + 1, a + m + 1);
	int l = 1, r = m, ans = m;
	while(l <= r) {
		int mid = (l + r) >> 1;
		if(check(mid)) {
			r = mid - 1;
			ans = mid;
		} else l = mid + 1;
	}
	check(ans);
	for(int i = 1; i <= m; i++) ev[tar[i]].pb(a[i].se);
	cout << ans << ln;
	for(int i = 1; i <= n; i++) {
		for(int x : ev[i]) cout << x << ' ';
		cout << 0 << ln;
	}
    cerr << "\nTime: " << clock() * 1000 / CLOCKS_PER_SEC;
}

Compilation message (stderr)

jobs.cpp: In function 'int main()':
jobs.cpp:46:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |                 freopen(task ".INP", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
jobs.cpp:47:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |                 freopen(task ".OUT", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100