Submission #1219601

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219601		toast12	Bikeparking (EGOI24_bikeparking)	C++20	100 / 100	81 ms	4796 KiB

Main

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

int main() {
    int n;
    cin >> n;
    vector<int> a(n), b(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < n; i++) cin >> b[i];
    int up = 0, down = 0;
    vector<int> v;
    for (int i = 0; i < n; i++) {
        while (!v.empty()) {
            // assign as many users as possible to the nearest better slot than their chosen one
            if (b[i] == 0) break;
            if (a[v.back()] == 0) {
                v.pop_back();
                continue;
            }
            int temp = min(a[v.back()], b[i]);
            up += temp;
            b[i] -= temp;
            a[v.back()] -= temp;
        }
        v.push_back(i);
    }
    for (int i = 0; i < n; i++) {
        // try to get as many neutral votes as possible
        int temp = min(a[i], b[i]);
        a[i] -= temp;
        b[i] -= temp;
        // the people left will downvote
        down += b[i];
    }
    cout << up-down << '\n';
    return 0;
}

• Subtask 1: 16 / 16
• Subtask 2: 9 / 9
• Subtask 3: 19 / 19
• Subtask 4: 24 / 24
• Subtask 5: 32 / 32