Submission #930338

#	Time	Username	Problem	Language	Result	Execution time	Memory
930338		Xiaoyang	Art Exhibition (JOI18_art)	C++17	100 / 100	136 ms	21868 KiB

art

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
 
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 1ll<<60
#define rep(i,a,b) for (ll i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
#define endl "\n"
void inc(ll &a,ll b) {a=(a+b)%mod;}
void dec(ll &a,ll b) {a=(a-b+mod)%mod;}
int prod(ll a,ll b) {return ll(a)*ll(b)%mod;}
int lowbit(ll x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}



const ll maxn=555555;
pll a[maxn];

signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	ll n;cin>>n;
	rep(i,1,n+1){
		cin>>a[i].fi>>a[i].se;
		//size,val
	}
	sort(a+1,a+n+1);
	ll mx=-1e18,ans=0,s=0;
	rep(i,1,n+1){
		mx=max(mx,a[i].fi-s);
		s+=a[i].se;
		ans=max(ans,s-a[i].fi+mx);
	}
	//maximise Sj-Aj+(Ai-Si-1)
	cout<<ans<<endl;
	return 0;
}

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