Submission #631431

#	Time	Username	Problem	Language	Result	Execution time	Memory
631431		BhavayGoyal	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	1 ms	212 KiB

bridge

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

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template<class T> using oset = 
            tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define int long long
#define ld long double
#define ar array
#define vi vector<int>
#define vii vector<vector<int>>
#define pii pair<int, int>
#define pb push_back
#define all(x) x.begin(), x.end()
#define f first
#define s second
#define endl "\n"

const int MOD = 1e9+7;
const int inf = 1e18;

const int d4i[4]={-1, 0, 1, 0}, d4j[4]={0, 1, 0, -1};
const int d8i[8]={-1, -1, 0, 1, 1, 1, 0, -1}, d8j[8]={0, 1, 1, 1, 0, -1, -1, -1};


// -------------------------------------------------- Main Code --------------------------------------------------

int a = 0, b = 0;
multiset<int> leftt, rightt;

void add(int x) {
    if (leftt.empty() || x < *leftt.rbegin()) {
        leftt.insert(x);
        a += x;
        if ((leftt.size()+rightt.size())%2 == 0 && leftt.size() > rightt.size()) {
            a -= *leftt.rbegin();
            b += *leftt.rbegin();
            rightt.insert(*leftt.rbegin());
            leftt.erase(leftt.find(*leftt.rbegin()));
        }
    }
    else {
        rightt.insert(x);
        b += x;
        if (rightt.size() > leftt.size()) {
            a += *rightt.begin();
            b -= *rightt.begin();
            leftt.insert(*rightt.begin());
            rightt.erase(rightt.begin());
        }
    }
}

void sol() {
    int k, n; cin >> k >> n;
    vector<array<int, 2>> arr;
    int sameSide = 0;
    for (int i = 0; i < n; i++) {
        char a, b; int x, y;
        cin >> a >> x >> b >> y;
        if (a == b) sameSide += abs(x-y);
        else arr.pb({x, y});
    }
    n = arr.size();
    sameSide += n;
    sort(all(arr), [&](array<int, 2> a, array<int, 2> b) {return a[0]+a[1] < b[0]+b[1];});

    vi pref(n);
    for (int i = 0; i < n; i++) {
        add(arr[i][0]); add(arr[i][1]);
        int median = *leftt.rbegin();
        pref[i] = median*leftt.size() - a + b - median*rightt.size();
    }
    // if (k == 1) {cout << pref[n-1]+sameSide << endl;return;}
    // leftt.clear(); rightt.clear(); a = 0, b = 0;
    // vi suff(n);
    // for (int i = n-1; i >= 0; i--) {
    //     add(arr[i][0]); add(arr[i][1]);
    //     int median = *leftt.rbegin();
    //     suff[i] = median*leftt.size() - a + b - median*rightt.size();
    // }
    // int ans = pref[n-1];
    // for (int i = 0; i < n-1; i++) ans = min(ans, pref[i]+suff[i+1]);
    // cout << sameSide+ans << endl;
}

signed main () {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t = 1;
    // cin >> t; 
    while (t--) {
        sol();
    }
    return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37