Submission #1273185

#	Time	Username	Problem	Language	Result	Execution time	Memory
1273185		hiepsimauhong	Art Exhibition (JOI18_art)	C++20	100 / 100	270 ms	24776 KiB

art

#include <bits/stdc++.h>

using namespace std;

#define int long long
using ll = long long;

#define FOR(I, L, R) for(int I(L) ; I <= (int)R ; ++I)
#define FOD(I, R, L) for(int I(R) ; I >= (int)L ; --I)
#define FOA(I, A) for(auto &I : A)

#define print(A,L,R) FOR(OK, L, R){if(A[OK]<=-oo / 10||A[OK]>=oo)cout<<"- ";else cout<<A[OK]<<' ';}cout<<'\n';
#define prints(A) FOA(OK, A){cout<<OK<<' ';}cout << '\n';
#define printz(A,L,R) FOR(OK, 0, L){FOR(KO, 1, R){if(A[OK][KO]>-oo&&A[OK][KO]<oo)cout<<A[OK][KO]<<' ';else cout << "- ";} cout << '\n';}cout << '\n';

#define fs first
#define sd second
#define ii pair<int,int>
#define iii pair<int, ii>
#define all(A) A.begin(), A.end()
#define quickly ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

const int N = 5e5 + 5;
const int mod = 1e9 + 7;
const int oo = 1e18;

int n;
ii a[N];

struct Segment_tree{
        int sg[N << 2], lazy[N << 2];

        void push_down(int id, int l, int r){
                if(lazy[id]){
                        lazy[id << 1] += lazy[id];
                        lazy[id << 1 | 1] += lazy[id];

                        sg[id << 1] += lazy[id];
                        sg[id << 1 | 1] += lazy[id];

                        lazy[id] = 0;
                }
        }

        void update(int id, int l, int r, int u, int v, int val){
                if(l > v || r < u){
                        return;
                }
                if(u <= l && r <= v){
                        lazy[id] += val;
                        sg[id] += val;
                        return;
                }

                push_down(id, l, r);

                int mid = (l + r) >> 1;
                update(id << 1, l, mid, u, v, val);
                update(id << 1 | 1, mid + 1, r, u, v, val);

                sg[id] = max(sg[id << 1], sg[id << 1 | 1]);
        }

        int get(int id, int l, int r, int u, int v){
                if(l > v || r < u){
                        return -oo;
                }
                if(u <= l && r <= v){
                        return sg[id];
                }

                push_down(id, l, r);

                int mid = (l + r) >> 1;
                return max(get(id << 1, l, mid, u, v), get(id << 1 | 1, mid + 1, r, u, v));
        }
} sg;

signed main(){ quickly
        cin >> n;

        FOR(i, 1, n){
                cin >> a[i].fs >> a[i].sd;
        }

        sort(a + 1, a + 1 + n);

        int ans = 0;
        FOR(i, 1, n){
                int w = a[i].fs;
                int cost = a[i].sd;

                sg.update(1, 1, n, 1, i, cost);

                sg.update(1, 1, n, i, i, w);

                ans = max(ans, sg.get(1, 1, n, 1, i) - w);
        }

        cout << ans;
}

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