Submission #620192

#	Time	Username	Problem	Language	Result	Execution time	Memory
620192		CSQ31	Cake 3 (JOI19_cake3)	C++17	24 / 100	4066 ms	7984 KiB

cake3

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) (int)(a.size())
#define all(a) a.begin(),a.end()
#define lb lower_bound
#define ub upper_bound
#define owo ios_base::sync_with_stdio(0);cin.tie(0);
#define MOD (ll)(998244353)
#define INF (ll)(5e18)
#define debug(...) fprintf(stderr, __VA_ARGS__),fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false);\
debug("%s time : %.4fs\n", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))
typedef long long int ll;
typedef long double ld;
typedef pair<ll,ll> PII;
typedef pair<int,int> pii;
typedef vector<vector<int>> vii;
typedef vector<vector<ll>> VII;
int main(){
	int n,m;
	cin>>n>>m;
	vector<PII>v(n);
	for(int i=0;i<n;i++)cin>>v[i].se>>v[i].fi;
	sort(all(v));
	ll ans = -1e18;
	for(int i=m-1;i<n;i++){
		ll sum = v[i].se - 2*v[i].fi; //right endpoint
		priority_queue<ll,vector<ll>,greater<ll>>pq; //pq stores middle m-2 elememts
		for(int j=i-1;j>=i-m+2;j--){
			sum+=v[j].se;
			pq.push(v[j].se);
		}
		for(int j=i-m+1;j>=0;j--){
			ans = max(ans,sum+v[j].se + 2*v[j].fi); //leftendpoint 
			if(v[j].se > pq.top()){
				sum+=v[j].se;
				sum-=pq.top();
				pq.pop();
				pq.push(v[j].se);
			}
			
		}
	}
	cout<<ans;
}

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