Submission #429817

#	Time	Username	Problem	Language	Result	Execution time	Memory
429817		talant117408	Road Construction (JOI21_road_construction)	C++17	7 / 100	640 ms	49604 KiB

road_construction

/*
    Code written by Talant I.D.
*/

#include <bits/stdc++.h>
//~ #include <ext/pb_ds/assoc_container.hpp>
 
//~ using namespace __gnu_pbds;
using namespace std;
 
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
//~ typedef tree <int, null_type, less_equal <int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
 
#define precision(n) fixed << setprecision(n)
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define mp make_pair
#define eps (double)1e-9
#define PI 2*acos(0.0)
#define endl "\n"
#define sz(v) int((v).size())
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define OK cout << "OK" << endl;
 
const ll mod = 1e9+7;
 
ll mode(ll a) {
    while (a < 0) {
        a += mod;
    }
    return a % mod;
}
 
ll subt(ll a, ll b) {
    return mode(mode(a)-mode(b));
}
 
ll add(ll a, ll b) {
    return mode(mode(a)+mode(b));
}
 
ll mult(ll a, ll b) {
    return mode(mode(a)*mode(b));
}
 
ll binpow(ll a, ll b) {
    ll res = 1;
    while (b) {
        if (b&1) res = mult(res, a);
        a = mult(a, a);
        b >>= 1;
    }
    return res;
}

int main() {
    do_not_disturb
    
    int n, k;
    cin >> n >> k;
    vector <pll> pos(n);
    for (int i = 0; i < n; i++) {
        cin >> pos[i].first >> pos[i].second;
    }
    
    sort(all(pos));
    
    vector <ll> Xs;
    map <ll, vector <ll>> byX;
    
    for (auto to : pos) {
        if (sz(Xs) == 0 || Xs.back() != to.first) {
            Xs.pb(to.first);
        }
        byX[to.first].pb(to.second);
    }
    
    multiset <ll, greater <ll>> st;
    
    for (int i = 0; i < sz(Xs); i++) {
        auto x1 = Xs[i], x2 = (i < sz(Xs)-1 ? Xs[i+1] : 0);
        for (int j = 0; j < sz(byX[x1])-1; j++) {
            st.insert(abs(byX[x1][j]-byX[x1][j+1]));
            if (sz(st) > k) {
                st.erase(st.find(*st.begin()));
            }
        }
        if (i < sz(Xs)-1) {
            for (int j = 0; j < sz(byX[x1]); j++) {
                auto it = lb(all(byX[x2]), byX[x1][j]);
                if (it != byX[x2].end()) {
                    st.insert(abs(byX[x1][j]-(*it))+x2-x1);
                    if (sz(st) > k) {
                        st.erase(st.find(*st.begin()));
                    }
                    it++;
                    if (it != byX[x2].end()) {
                        st.insert(abs(byX[x1][j]-(*it))+x2-x1);
                        if (sz(st) > k) {
                            st.erase(st.find(*st.begin()));
                        }
                    }
                    it--;
                }
                if (it != byX[x2].begin()) {
                    it--;
                    st.insert(abs(byX[x1][j]-(*it))+x2-x1);
                    if (sz(st) > k) {
                        st.erase(st.find(*st.begin()));
                    }
                }
            }
        }
    }
    
    auto it = st.end();
    it--;
    for (; it != st.begin(); it--) {
        cout << *it << endl;
    }
    cout << *it << endl;
    
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 6
• Subtask 3: 7 / 7
• Subtask 4: 0 / 20
• Subtask 5: 0 / 27
• Subtask 6: 0 / 35