Submission #1093074

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093074		Seb	Potatoes and fertilizers (LMIO19_bulves)	C++17	100 / 100	147 ms	11200 KiB

bulves

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
template <typename T> //order_of_key = menores, find_by_order = consultar indexado en 0, regresa iterador
using ordered_set =  tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;

using ll = long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vll = vector<ll>;
using vii = vector<int>;
mt19937_64 rnd(chrono::steady_clock::now().time_since_epoch().count());

#define mid ((l+r)>>1)
#define f first
#define s second
#define pb push_back
#define MP make_pair
#define all(x) (x).begin(),(x).end()
#define inicio(x) (*(x).begin())
#define rinicio(x) (*(x).rbegin())
#define SZ(x) (int)(x.size())

const ll MAXN = (ll)3e3 + 5;
const ll MAXK = (ll)3e4 + 5;
const ll MOD = (ll)1e9 + 7;
const ll INF = (ll)1e12 + 5;
const ll OFFSET = (ll)1e6;

priority_queue<ll> pq;
ll sum, brute, M, ans, pre;

void tc() {
    ll N; cin >> N;
    for (int i = 0; i < N; i++) {
        ll a, b; cin >> a >> b;
        a -= b;
        sum += a;
        brute += abs(sum);

        pq.push(sum);
        pq.push(sum);
        if (i < N - 1) pq.pop();
    }

    M = 2;
    pq.push(sum);
    pq.push(0);

    while (!pq.empty() && pq.top() > sum) {
        pq.pop();
        M--;
    }

    pre = pq.top();
    while (!pq.empty() && pq.top() >= 0) {
        ans -= M*abs(pre - pq.top());
        M--;
        pre = pq.top();
        pq.pop();
    }
    cout << brute - ans << "\n";
    return;
}

int main() {
    ios_base::sync_with_stdio(0);cin.tie(0);
    int t = 1;
    //cin >> t;
    for (int i = 1; i <= t; i++) {
        tc();
    }
    return 0;
}

//checa tus constantes, n = 1? overflow?

• Subtask 1: 24 / 24
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 10 / 10
• Subtask 5: 36 / 36