Submission #102522

#	Time	Username	Problem	Language	Result	Execution time	Memory
102522		Bruteforceman	Cake 3 (JOI19_cake3)	C++11	5 / 100	4059 ms	428 KiB

cake3

#include "bits/stdc++.h"
using namespace std;
typedef pair <int, int> pii;

pii a[100010];
int n, m;
const long long inf = 1e18;

long long query(int i, int j) {
	vector <int> v;
	long long ans = -2 * (a[j].first - a[i].first);
	for(int x = i; x <= j; x++) {
		v.push_back(a[x].second);
	}
	sort(v.begin(), v.end(), greater <int> ());
	for(int i = 0; i < m; i++) {
		ans += v[i];
	}
	return ans;
}

int main(int argc, char const *argv[])
{
	scanf("%d %d", &n, &m);
	for(int i = 1; i <= n; i++) {
		int p, q;
		scanf("%d %d", &p, &q);
		a[i] = pii(q, p);
	}
	sort(a + 1, a + n + 1);
	int l = 1;
	long long ans = LLONG_MIN;
	for(int i = 1; i <= n; i++) {
		for(int j = 1; j <= i; j++) {
			if((i - j + 1) >= m) {
				ans = max(ans, query(j, i));
			}
		}
	}
	printf("%lld\n", ans);
	return 0;
}

Compilation message (stderr)

cake3.cpp: In function 'int main(int, const char**)':
cake3.cpp:31:6: warning: unused variable 'l' [-Wunused-variable]
  int l = 1;
      ^
cake3.cpp:24:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
cake3.cpp:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &p, &q);
   ~~~~~^~~~~~~~~~~~~~~~~

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