제출 #1198277

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1198277		tawwie	Art Exhibition (JOI18_art)	C++20	0 / 100	0 ms	324 KiB

art

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

vector<pair<ll, ll>> v;

ll sz(int idx){
    return v[idx].first;
}
ll val(int idx){
    return v[idx].second;
}

int main(){
    cin.tie(NULL)->ios_base::sync_with_stdio(false);
    int n; cin >> n;
    for(int i=0; i<n; i++){
        ll a, b; cin >> a >> b;
        v.push_back({a, b}); // sz, val
    }
    sort(v.begin(), v.end());
    //for(auto [i, j] : v) cout << i << ' ' << j << '\n';
    // deque is actually overkill for this task
    // a two pointer approach with sliding window is all it takes
    // my main intuition was correct, just the implementation was a bit wonky
    ll ans = -1e18, s = 0; int l = 0;
    //deque<pair<ll, int>> dq; dq.push_back({sz(0), l}); s += val(0); // {size, index}
    for(int r=0; r<n; r++){
        s += val(r);
        while(l < r){
            ll add = s - (sz(r) - sz(l));
            ll rev = s - val(l) - (sz(r) - sz(l + 1));
            if(rev > add){
                s -= val(l); l++;
            }else{
                break;
            }
        }
        ans = max(ans, s - (sz(r) - sz(l)));
    }
    cout << ans;
    return 0;
}
/*
15
1543361732 260774320
2089759661 257198921
1555665663 389548466
4133306295 296394520
2596448427 301103944
1701413087 274491541
2347488426 912791996
2133012079 444074242
2659886224 656957044
1345396764 259870638
2671164286 233246973
2791812672 585862344
2996614635 91065315
971304780 488995617
1523452673 988137562

2
1000000000 1
1999999999 2
*/

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