Submission #682410

#	Time	Username	Problem	Language	Result	Execution time	Memory
682410		vjudge1	Road Construction (JOI21_road_construction)	C++17	100 / 100	3129 ms	21824 KiB

road_construction

#include <bits/stdc++.h>

#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

using namespace std;

#define int long long
#define ll long long
#define vi vector<long long>
#define pb push_back
#define sz(s) (int)s.size()
#define all(v) v.begin(), v.end()
#define show(a) cerr << #a <<" -> "<< a <<"\n"
#define pp pair<int,int>
#define FF first
#define SS second
#define endl "\n"
#define ld long double

const int N = 1e6 + 2, N3 = 1e3 + 6, inf = 1e18 + 7, LOG = 20;
map<char, int> md{{'N', 0}, {'E', 1}, {'S', 2}, {'W', 3}};
const int dx[] = {-1, 0, 1, 0};
const int dy[] = {0, 1, 0, -1};
string stepDir = "RDLU";

int n, k, x[N], y[N];
multiset <int> st;
vector <pp> v;

//bool check(int z) {
//    int cnt = 0;
//    for (int i = 1; i < sz(v); i++) {
//        for (int j = 0; j < i; j++) {
//            if (cnt >= k) return 1;
//            if (abs(v[i].FF - v[j].FF) > z) break;
//            if (abs(v[i].FF - v[j].FF) + abs(v[i].SS - v[j].SS) <= z) {
//                cnt++;
////                cout << abs(v[i].FF - v[j].FF) + abs(y[i] - y[j]) << " " << x[j] << " " << y[j] << " " << cnt << "\n";
//            }
//        }
////        cout << cnt << " ";
//    }
//    return cnt >= k;
//}

main () {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

//	freopen(".in", "r", stdin);
//	freopen(".out", "w", stdout);

    cin >> n >> k;
    for (int i = 1; i <= n; i++) {
        cin >> x[i] >> y[i];

        v.pb({x[i], y[i]});
    }
    sort(all(v));
//    int l = 0, r = inf, best = -1;
//    while (l <= r) {
//        int mid = (l + r) / 2;
//        if (check(mid)) {
//            best = mid;
//            r = mid - 1;
//        }
//        else l = mid + 1;
//    }

    vi ans;
    int cnt = 0;
    for (int i = 1; i < sz(v); i++) {
        for (int j = max(0ll, i - 1000); j < i; j++) {
            if (sz(st) < k) {
                st.insert(abs(v[i].FF - v[j].FF) + abs(v[i].SS - v[j].SS));
            }
            else {
                if (*st.rbegin() > abs(v[i].FF - v[j].FF) + abs(v[i].SS - v[j].SS)) {
                    st.erase(st.find(*st.rbegin()));
                    st.insert(abs(v[i].FF - v[j].FF) + abs(v[i].SS - v[j].SS));
                }
            }
        }
    }

    for (auto to : st) {
        cout << to << "\n";
    }



	return 0;
}

Compilation message (stderr)

road_construction.cpp:3: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
    3 | #pragma comment(linker, "/stack:200000000")
      | 
road_construction.cpp:48:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   48 | main () {
      | ^~~~
road_construction.cpp: In function 'int main()':
road_construction.cpp:74:9: warning: unused variable 'cnt' [-Wunused-variable]
   74 |     int cnt = 0;
      |         ^~~

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