Submission #263417

#	Time	Username	Problem	Language	Result	Execution time	Memory
263417		mjkocijan	Cake 3 (JOI19_cake3)	C++14	24 / 100	240 ms	632 KiB

cake3

#include <bits/stdc++.h>
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef long long ll;
typedef pair<ll, ll> ii;
#define MAXN 2020
#define INF 1001001001001001001LL

int n, m;
ll _v[MAXN], c[MAXN];
vector<ii> v;
multiset<ll> s;
ll reza = -INF;

int main()
{
	scanf("%d%d", &n, &m);
	for (int i = 0; i < n; i++) {
		scanf("%lld%lld", &_v[i], &c[i]);
		v.pb({c[i], _v[i]});
	}
	sort(v.begin(), v.end());
	for (int i = 0; i <= n - m; i++) {
		s.clear();
		ll suma = 0;
		for (int j = i; j < i + m; j++) {
			s.insert(v[j].Y);
			suma += v[j].Y;
		}
		//cout << suma - (v[i + m - 1].X - v[i].X) * 2LL<<endl;
		reza = max(reza, suma - (v[i + m - 1].X - v[i].X) * 2LL);
		for (int j = i + m; j < n; j++) {
			if ((*s.begin()) < v[j].Y) {
				//cout << (*s.begin()) <<'.'<<v[j].Y<<endl;
				suma += v[j].Y - (*s.begin());
				s.erase(s.begin());
				s.insert(v[j].Y);
			}
			//cout << suma - (v[j].X - v[i].X) * 2LL << endl;
			reza = max(reza, suma - (v[j].X - v[i].X) * 2LL);
		}
	}
	printf("%lld\n", reza);
  return 0;
}

Compilation message (stderr)

cake3.cpp: In function 'int main()':
cake3.cpp:19:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |  scanf("%d%d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~
cake3.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |   scanf("%lld%lld", &_v[i], &c[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 19 / 19
• Subtask 3: 0 / 76