Submission #1049787

#	Time	Username	Problem	Language	Result	Execution time	Memory
1049787		vjudge1	Art Exhibition (JOI18_art)	C++17	30 / 100	1045 ms	8660 KiB

art

#include <bits/stdc++.h>
#define f first
#define s second
using namespace std;
int n;
long long sm[1000000], mn[1000000], mx[1000000], s[1000000], mox=-INT64_MAX;
pair<long long, int> a[500000];
void bt(int tl, int tr, int v){
    if(tl==tr){
        sm[v]=a[tl].s;
        mx[v]=a[tl].f;
        mn[v]=mx[v];
        s[v]=sm[v];
    }else{
        int tm=(tl+tr)/2;
        bt(tl, tm, v*2);
        bt(tm+1, tr, v*2+1);
        sm[v]=sm[v*2]+sm[v*2+1];
        mx[v]=max(mx[v*2], mx[v*2+1]);
        mn[v]=min(mn[v*2], mn[v*2+1]);
        s[v]=sm[v]-mx[v]+mn[v];
    }
    mox=max(mox, s[v]);
}
pair<long long, pair<long long, long long>> get(int l, int r, int v, int tl, int tr) {
    if(l<=tl&&r>=tr){
        return {sm[v],{mx[v], mn[v]}};
    }
    if(l>tr||r<tl){
        return {0,{0,INT64_MAX}};
    }
    int tm=(tl+tr)/2;
    pair<long long, pair<long long, long long>> p1=get(l,r,v*2,tl,tm),p2=get(l,r,v*2+1,tm+1,tr);
    p1.f=p1.f+p2.f;p1.s.f=max(p1.s.f, p2.s.f);p1.s.s=min(p1.s.s, p2.s.s);
    mox=max(mox, p1.f-p1.s.f+p1.s.s);
    long long shm=mox;
    return p1;
}
int main() {
    cin >> n;
    for(int i=0; i<n; i++){
        cin >> a[i].f >> a[i].s;
    }
    sort(a, a+n);
    bt(0, n-1, 1);
    for(int i=0; i<n-1; i++){
        for(int j=i+1; j<n; j++){
            get(i, j, 1, 0, n-1);
        }
    }
    cout << mox;
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'std::pair<long long int, std::pair<long long int, long long int> > get(int, int, int, int, int)':
art.cpp:36:15: warning: unused variable 'shm' [-Wunused-variable]
   36 |     long long shm=mox;
      |               ^~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50