Submission #676386

#	Time	Username	Problem	Language	Result	Execution time	Memory
676386		vjudge1	Schools (IZhO13_school)	C++17	100 / 100	112 ms	10828 KiB

school

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int MAXN=3e5;
int n, m, s;
int a[MAXN+5];
int b[MAXN+5];
int id[MAXN+5];
bool cmp(int i, int j){
    return a[i]-b[i]>a[j]-b[j];
}
ll pre[MAXN+5];
ll suf[MAXN+5];
priority_queue<int, vector<int>, greater<int> > pq;
int main(){
//    freopen("C.INP", "r", stdin);
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>m>>s;
    for(int i=1; i<=n; i++){
        cin>>a[i]>>b[i];
        id[i]=i;
    }
    sort(id+1, id+n+1, cmp);
    ll cur=0;
    for(int i=1; i<=n; i++){
        pq.push(a[id[i]]);
        cur+=a[id[i]];
        if(i>m){
            cur-=pq.top();
            pq.pop();
        }
        pre[i]=cur;
    }
    cur=0;
    while(!pq.empty()) pq.pop();
    for(int i=n; i>=1; i--){
        pq.push(b[id[i]]);
        cur+=b[id[i]];
        if(i<n-s+1){
            cur-=pq.top();
            pq.pop();
        }
        suf[i]=cur;
    }
    ll res=0;
    for(int i=m; i+s<=n; i++){
        res=max(res, suf[i+1]+pre[i]);
    }
    cout<<res;
    return 0;
}

• Subtask 1: 100 / 100