Submission #866587

#	Time	Username	Problem	Language	Result	Execution time	Memory
866587		maks007	Stove (JOI18_stove)	C++14	0 / 100	1 ms	348 KiB

stove

#include "bits/stdc++.h"

using namespace std;
//#define int long long
signed main () {
	int n, k;
	cin >> n >> k;
	vector <int> a(n);
	for(int i = 0; i < n; i ++) cin >> a[i];
	function <int(int,int)> good=[&](int x, int opt) {
		int cnt = 1, ff = a[0], ans = 0;
		for(int i = 1; i < n; i ++) {
			if(a[i]-ff > x) {
				cnt ++;
				ans += a[i-1]-ff+1;
				ff = a[i];
			}
		}
		ans += a[n-1]-ff+1;
		if(opt) return ans;
		if(cnt <= k) return 1;
		return 0;
	};
	int l = 0, r = 1e9;
	while(l < r) {
		int mid = (l + r) / 2;
		if(good(mid, 0)) r = mid;
		else l = mid + 1;
	}
	cout << good(r, 1);
	return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50