Submission #1100962

#	Time	Username	Problem	Language	Result	Execution time	Memory
1100962		akzytr	Stove (JOI18_stove)	C++17	50 / 100	1054 ms	2140 KiB

stove

#include <bits/stdc++.h>
using namespace std;
template <typename T> using ve = vector<T>;
typedef long long ll;
#define pb push_back
#define fi first
#define se second
#define endl '\n'

int main() {

	int N, K;
	cin >> N >> K;

	ve<pair<ll, ll>> times(N);
	for(ll i = 0; i < N; i++) {
		scanf("%lld", &times[i].fi);
		times[i].se = 1;
	}

	ll mi_left[K + 1] = {};
	ll mi_left2[K + 1] = {};

	bool tk = false;

	const ll MXN = 1e16;
	for(ll i = 0; i <= K; i++) {
		mi_left[i] = 0;
		mi_left2[i] = MXN;
	}

	for(ll i = N - 1; i >= 0; i--) {
		if(i == N - 1 || times[i].fi + 1 != times[i + 1].fi) {
			for(ll left = K; left >= 0; left--) {
				mi_left2[left] = min(mi_left2[left], (tk == 0 ? 0 : (ll)MXN) + times[i].fi + 1);
				if(left == 0) {
					break;
				}
				mi_left2[left] = min(mi_left2[left], mi_left[left] + times[i].fi + 1);
			}
		}

		tk = 1;
		for(ll left = K; left >= 0; left--) {
			mi_left2[left] = min(mi_left2[left], (ll)MXN + times[i].fi);

			if(left == 0) {
				break;
			}
			mi_left[left] = min((ll)MXN, mi_left2[left - 1] - times[i].fi);
		}
	}

	cout << mi_left[K] << endl;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   scanf("%lld", &times[i].fi);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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