Submission #235683

#	Time	Username	Problem	Language	Result	Execution time	Memory
235683		zaneyu	Art Exhibition (JOI18_art)	C++14	50 / 100	1096 ms	52064 KiB

art

/*input
6
1000000000000000 1000000000
1000000000000000 1000000000
1000000000000000 1000000000
1000000000000000 1000000000
1000000000000000 1000000000
1000000000000000 1000000000
*/ 
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
 
#pragma GCC optimize("unroll-loops,no-stack-protector")
//order_of_key #of elements less than x
// find_by_order kth element
typedef long long int ll;
#define ld long double
#define pii pair<ll,ll>
typedef tree<pii, null_type, less<pii>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
const ll maxn=5e5+5;
const ll maxlg=__lg(maxn)+2;
const ll INF64=4e18;
const int INF=0x3f3f3f3f;
const ll MOD=998244353;
const ld PI=acos(-1);
const ld eps=1e-9;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define GET_POS(c,x) (lower_bound(c.begin(),c.end(),x)-c.begin())
ll mult(ll a,ll b){
    return (a*b)%MOD;
}
ll mypow(ll a,ll b){
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1) res=mult(res,a);
        a=mult(a,a);
        b>>=1;
    }
    return res;
}
#define int ll
struct node{
    ll mx,lazy=0;
}seg[4*maxn];
node pull(node a,node b){
    node x;
    x.mx=max(a.mx,b.mx);
    return x;
}
void pushdown(int idx,int l,int r){
    if(!seg[idx].lazy) return;
    seg[idx].mx+=seg[idx].lazy;
    if(l==r){
        seg[idx].lazy=0;
        return;
    }
    seg[idx*2].lazy+=seg[idx].lazy;
    seg[idx*2+1].lazy+=seg[idx].lazy;
    seg[idx].lazy=0;
}
void upd(int idx,int l,int r,int ql,int qr,int x){
    pushdown(idx,l,r);
    if(r<ql or l>qr) return;
    if(ql<=l and r<=qr){
        seg[idx].lazy+=x;
        pushdown(idx,l,r);
        return;
    }
    int mid=(l+r)/2;
    upd(idx*2,l,mid,ql,qr,x);
    upd(idx*2+1,mid+1,r,ql,qr,x);
    seg[idx]=pull(seg[idx*2],seg[idx*2+1]);
}
ll query(int idx,int l,int r,int ql,int qr){
    if(r<ql or l>qr) return -INF64;
    pushdown(idx,l,r);
    if(ql<=l and r<=qr){
        return seg[idx].mx;
    }
    int mid=(l+r)/2;
    return max(query(idx*2,l,mid,ql,qr),query(idx*2+1,mid+1,r,ql,qr));
}
pii arr[maxn];
int32_t main(){
    int n;
    cin>>n;
    REP(i,n) cin>>arr[i].f>>arr[i].s;
    sort(arr,arr+n);
    ll ans=0;
    REP(i,n){
        upd(1,0,n-1,0,i,arr[i].s);
        upd(1,0,n-1,i,i,arr[i].f);
        MXTO(ans,query(1,0,n-1,0,i)-arr[i].f);
    }
    cout<<ans<<'\n';
}

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