Submission #707812

#	Time	Username	Problem	Language	Result	Execution time	Memory
707812		victor_gao	Cake 3 (JOI19_cake3)	C++17	24 / 100	4058 ms	9776 KiB

cake3

//#pragma GCC optimize("Ofast,unroll-loops,O3")
//#pragma GCC optimize("avx,avx2,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,fma,tune=native")
#include<bits/stdc++.h>
//#include<bits/extc++.h>
//#pragma pack(1)
#define fast ios::sync_with_stdio(0); cin.tie(0);
#define int long long
#define pii pair<int,int>
#define x first
#define y second
using namespace std;
//using namespace __gnu_pbds;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//typedef tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update> order_multiset;
//typedef tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update> order_set;
int n,m;
pii arr[200015];
bool cmp(pii a,pii b){
    if (a.y!=b.y) return a.y<b.y;
    return a.x<b.x;
}
signed main(){
    fast
    cin>>n>>m;
    for (int i=1;i<=n;i++)
        cin>>arr[i].x>>arr[i].y;
    sort(arr+1,arr+1+n,cmp);
    int ans=-1e18;
    for (int i=1;i<=n-m+1;i++){
        multiset<int>st;
        int sum=0;
        for (int j=0;j<m;j++){
            st.insert(arr[i+j].x);
            sum+=arr[i+j].x;
        }
        ans=max(ans,sum-2*(arr[i+m-1].y-arr[i].y));
        for (int j=i+m;j<=n;j++){
            sum+=arr[j].x;
            st.insert(arr[j].x);
            sum-=(*st.begin());
            st.erase(st.begin());
            ans=max(ans,sum-2*(arr[j].y-arr[i].y));
        }
    }
    cout<<ans<<'\n';
}

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