oj.uz

Submission #893875

# Submission time Handle Problem Language Result Execution time Memory
893875 2023-12-27T15:32:57 Z vjudge1 Road Construction (JOI21_road_construction) C++17
100 / 100
 5551 ms 389148 KB 
#include <bits/stdc++.h>
#define ll long long
#define str string
#define ins insert
#define ld long double
#define pb push_back
#define pf push_front
#define pof pop_front()
#define pob pop_back()
#define lb lower_bound
#define ub upper_bound
#define endl "\n"
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define sz size()
#define vll vector<ll>
#define bc back()
#define arr array
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <class _T>
bool chmin(_T &x, const _T &y){
    if (x>y)x=y;
    return x>y;
}
template <class _T>
bool chmax(_T &x, const _T &y){
    if (x<y)x=y;
    return x<y;
}
#define ordered_set tree<ll, null_type,less_equal<ll>, rb_tree_tag,tree_order_statistics_node_update>
void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
void start(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
const ll inf=1e18+7;
const ll mod=1e9+7;
const ll N=2e5+5;
const ld eps=1e-9;
vector<pair<ll,ll>> v;
multiset<ll> ms;
ll n,k;
ll i,j,mn=inf;
map<pair<pair<ll,ll>,pair<ll,ll>>,bool> vis;
ll dis(ll i,ll j){
    return abs(v[i].fr-v[j].fr)+abs(v[i].sc-v[j].sc);
}
bool cmp(pair<ll,ll> a,pair<ll,ll> b){
    return a.sc<b.sc;
}
void upd_ans(ll i,ll j){
    if(dis(i,j)>=mn || vis[{v[i],v[j]}])return;
    vis[{v[i],v[j]}]=true;
    vis[{v[j],v[i]}]=true;
    ms.ins(dis(i,j));
    if((ll)ms.sz>k)ms.erase(--ms.end());
    if((ll)ms.sz==k)chmin(mn,*ms.rbegin());
}
void rec(ll l,ll r){
    if(r-l<=3){
        for(i=l;i<r;i++){
            for(j=i+1;j<=r;j++)upd_ans(i,j);
        }
        sort(v.begin()+l,v.begin()+r+1,cmp);
        return ;
    }
    ll m=(l+r)/2;
    ll mx=v[m].fr;
    rec(l,m),rec(m+1,r);
    vector<pair<ll,ll>> v2(r-l+1);
    merge(v.begin()+l,v.begin()+m+1,v.begin()+m+1,v.begin()+r+1,v2.begin(),cmp);
    copy(v2.begin(),v2.begin()+r-l+1,v.begin()+l);
    vll vv;
    for(i=l;i<=r;i++){
        if(mn<=abs(v[i].fr-mx))continue;
        for(j=vv.sz-1;j>=0;j--){
            if(mn<=abs(v[i].sc-v[vv[j]].sc))break;
            upd_ans(i,vv[j]);
        }
        vv.pb(i);
    }
}
void solve(){
	ll i,j;
	ll a,b;
	cin>>n>>k;
	for(i=0;i<n;i++){
        cin>>a>>b;
        v.pb({a,b});
	}
	sort(all(v));
	rec(0,n-1);
	for(auto i : ms) cout<<i<<endl;
}
signed main(){
	start();
    ll t=1;
	//cin>>t;
    while(t--) solve();
    return 0;
}
/*





*/

Compilation message

road_construction.cpp: In function 'void solve()':
road_construction.cpp:90:7: warning: unused variable 'j' [-Wunused-variable]
   90 |  ll i,j;
      |       ^
road_construction.cpp: In function 'void fre(std::string)':
road_construction.cpp:36:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
road_construction.cpp:36:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 705 ms 70112 KB Output is correct
2 Correct 719 ms 69572 KB Output is correct
3 Correct 503 ms 53844 KB Output is correct
4 Correct 463 ms 53840 KB Output is correct
5 Correct 700 ms 73332 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2821 ms 282860 KB Output is correct
2 Correct 2720 ms 281788 KB Output is correct
3 Correct 354 ms 53844 KB Output is correct
4 Correct 2375 ms 307852 KB Output is correct
5 Correct 1733 ms 266356 KB Output is correct
6 Correct 1769 ms 266636 KB Output is correct
7 Correct 1862 ms 271992 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 109 ms 10236 KB Output is correct
2 Correct 109 ms 10240 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 77 ms 10204 KB Output is correct
5 Correct 96 ms 10068 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 109 ms 10236 KB Output is correct
2 Correct 109 ms 10240 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 77 ms 10204 KB Output is correct
5 Correct 96 ms 10068 KB Output is correct
6 Correct 122 ms 10192 KB Output is correct
7 Correct 112 ms 10128 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 113 ms 10176 KB Output is correct
11 Correct 80 ms 10160 KB Output is correct
12 Correct 96 ms 10128 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 705 ms 70112 KB Output is correct
2 Correct 719 ms 69572 KB Output is correct
3 Correct 503 ms 53844 KB Output is correct
4 Correct 463 ms 53840 KB Output is correct
5 Correct 700 ms 73332 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 3995 ms 305656 KB Output is correct
8 Correct 3898 ms 305812 KB Output is correct
9 Correct 448 ms 53844 KB Output is correct
10 Correct 4572 ms 306748 KB Output is correct
11 Correct 5551 ms 389148 KB Output is correct
12 Correct 1644 ms 204448 KB Output is correct
13 Correct 2547 ms 285172 KB Output is correct

Subtask #6
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 705 ms 70112 KB Output is correct
2 Correct 719 ms 69572 KB Output is correct
3 Correct 503 ms 53844 KB Output is correct
4 Correct 463 ms 53840 KB Output is correct
5 Correct 700 ms 73332 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 2821 ms 282860 KB Output is correct
8 Correct 2720 ms 281788 KB Output is correct
9 Correct 354 ms 53844 KB Output is correct
10 Correct 2375 ms 307852 KB Output is correct
11 Correct 1733 ms 266356 KB Output is correct
12 Correct 1769 ms 266636 KB Output is correct
13 Correct 1862 ms 271992 KB Output is correct
14 Correct 109 ms 10236 KB Output is correct
15 Correct 109 ms 10240 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 77 ms 10204 KB Output is correct
18 Correct 96 ms 10068 KB Output is correct
19 Correct 122 ms 10192 KB Output is correct
20 Correct 112 ms 10128 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 113 ms 10176 KB Output is correct
24 Correct 80 ms 10160 KB Output is correct
25 Correct 96 ms 10128 KB Output is correct
26 Correct 3995 ms 305656 KB Output is correct
27 Correct 3898 ms 305812 KB Output is correct
28 Correct 448 ms 53844 KB Output is correct
29 Correct 4572 ms 306748 KB Output is correct
30 Correct 5551 ms 389148 KB Output is correct
31 Correct 1644 ms 204448 KB Output is correct
32 Correct 2547 ms 285172 KB Output is correct
33 Correct 4785 ms 359908 KB Output is correct
34 Correct 4735 ms 360568 KB Output is correct
35 Correct 5037 ms 384540 KB Output is correct
36 Correct 1684 ms 213144 KB Output is correct
37 Correct 1714 ms 212588 KB Output is correct
38 Correct 2863 ms 328972 KB Output is correct