Submission #952451

#	Time	Username	Problem	Language	Result	Execution time	Memory
952451		SN0WM4N	Cake 3 (JOI19_cake3)	C++14	0 / 100	1 ms	500 KiB

cake3

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define bpc __builtin_popcount
#define mp make_pair
#define ull unsigned long long
#define ld double
#define ll long long
#define F first
#define S second

using namespace __gnu_pbds;
using namespace std;

typedef tree<long long, null_type, less_equal<long long>,
    rb_tree_tag, tree_order_statistics_node_update> Tree;

const ll INF = 9223372036854775807LL;
const ll inf = 2147483647;
const ll MOD = 1e9 + 7;
const ld PI = acos(-1);
const ll NROOT = 320;

//void FileIO(string in, string out) {	
//#ifndef LOCAL
//	freopen(in, "r", stdin);
//	freopen(out, "w", stdout);
//#endif
//}

ll binpow(ll a, ll b) {
	ll res = 1;
	for (; b; b /= 2, a *= a, a %= MOD)
		if (b & 1) res *= a, res %= MOD;
	return res;
}

bool dataOverflow(ll a, ll b) {return (log10(a) + log10(b) >= 18);}
ll gcd(ll a, ll b) {return b ? gcd(b, a % b) : a;}
ll lcm(ll a, ll b) {return a * b / gcd(a, b);}
ll invmod(ll a) {return binpow(a, MOD - 2);}
ll ceil(ll a, ll b) {return (a + b - 1) / b;}

void print(priority_queue<ll, vector<ll>, greater<ll>> q) {	
	int cnt = 0;
	while (!q.empty()) {
		if (cnt > 0)
			cerr << " ";
		cerr << q.top();
		q.pop();	
		cnt ++;
	}
}

int32_t main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0); 

	int n, m;
	cin >> n >> m;
	vector<pair<ll, ll>> v(n + 1);

	for (int i = 1; i <= n; i ++) 
		cin >> v[i].S >> v[i].F;

	sort(v.begin(), v.end());
	for (auto &x : v) {
		swap(x.F, x.S);
	}

	ll ans = 0;
	for (int i = 1; i <= n; i ++) {
		ll act = 0;
		priority_queue<ll, vector<ll>, greater<ll>> q;

		for (int j = i + 1; j <= n; j ++) {
			if (q.size() == m - 2) {
				ll tmp = act + v[i].F + v[j].F;
				tmp -= 2 * (v[j].S - v[i].S);
				ans = max(ans, tmp);

//				cerr << i << " " << j << ": {";
//				print(q);
//				cerr << "} => " << tmp << '\n';

				q.push(v[j].F);
				act += v[j].F;
				act -= q.top();
				q.pop();	
			} else {	
				q.push(v[j].F);
				act += v[j].F;
			}
		}
	}

	cout << ans << "\n";

	return 0;
}

Compilation message (stderr)

cake3.cpp: In function 'int32_t main()':
cake3.cpp:77:17: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int, std::vector<long long int>, std::greater<long long int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   77 |    if (q.size() == m - 2) {
      |        ~~~~~~~~~^~~~~~~~

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