Submission #394114

#	Time	Username	Problem	Language	Result	Execution time	Memory
394114		teehandsome	Art Exhibition (JOI18_art)	C++11	100 / 100	247 ms	24800 KiB

art

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define endl '\n'
#define INF 1e9+7
#define all(x) x.begin(),x.end()
using namespace std;
using namespace __gnu_pbds;
using ll=long long;
using pii=pair<int,int>;
using ppi=pair<int,pii>;
using oset=tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>;

template<typename T>
void _print(vector<T> x) {cerr<<"{"; for(auto e:x) cerr<<e<<","; cerr<<"}";}
void _print(pii x) {cerr<<"{"<<x.first<<","<<x.second<<"}";}
template<typename T>
void _print(T x) {cerr<<x;}

void dbg() {cerr<<endl;}
template<typename Head,typename... Tail>
void dbg(Head H,Tail... T) {
    _print(H);
    if(sizeof...(T)) cerr<<",";
    else cerr<<"\"]";
    dbg(T...);
}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:[\"",dbg(__VA_ARGS__)

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

using pll=pair<ll,ll>;
#define x first
#define y second

const int mxn=5e5+10;
pll ar[mxn];
ll dp[mxn];
int n;

int main () {
    ios::sync_with_stdio(false); cin.tie(0);
    cin>>n;
    for(int i=0;i<n;i++) {
        cin>>ar[i].x>>ar[i].y;
        //size,value
    }
    sort(ar,ar+n);
//    for(int i=0;i<n;i++) {
//        cout<<"{"<<ar[i].x<<","<<ar[i].y<<"}"<<endl;
//    }

    ll ans=dp[0];
    ll mx=ar[0].x;

    for(int i=0;i<n;i++) {
        if(i) dp[i]=dp[i-1];
        dp[i]+=ar[i].y;
//        debug(i,ar[i].x,dp[i]);
    }
    for(int i=1;i<n;i++) {
        mx=max(mx,ar[i].x-dp[i-1]);
        ans=max(ans,dp[i]-ar[i].x+mx);
//        debug(i,mx);
    }
    cout<<ans<<endl;
}

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