Submission #1198269

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198269		tawwie	Art Exhibition (JOI18_art)	C++20	0 / 100	0 ms	320 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 = 0, 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){
            if(s - (sz(r) - sz(l)) < s - val(l) - (sz(r) - sz(l + 1))){
                s -= val(l); l--;
            }else{
                break;
            }
        }
        ans = max(ans, s - (sz(r) - sz(l)));
    }
    cout << ans;
    return 0;
}

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