oj.uz

답안 #995556

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
995556 2024-06-09T10:47:50 Z snpmrnhlol Road Construction (JOI21_road_construction) C++17
100 / 100
 3420 ms 23128 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll N = 25e4;
const ll inf = 1e18;
mt19937 rng;
struct treap{
    ll l,r;
    ll x,y;
    ll val;
}v[N + 1];
struct point{
    ll x,y;
}v2[N];
ll cnt = 1;
ll lid,rid;
ll n,k,cnt2 = 0;
ll ans[N + 1];
void dbgtreap(ll pos){
    cout<<pos<<' '<<v[pos].l<<' '<<v[pos].r<<' '<<v[pos].x<<' '<<v[pos].y<<' '<<v[pos].val<<'\n';
    if(v[pos].l != 0)dbgtreap(v[pos].l);
    if(v[pos].r != 0)dbgtreap(v[pos].r);
}
ll mergetreap(ll l, ll r){
    if(l == 0){return r;}
    if(r == 0){return l;}
    if(v[l].y <= v[r].y){
        v[r].l = mergetreap(l, v[r].l);
        return r;
    }else{
        v[l].r = mergetreap(v[l].r, r);
        return l;
    }
}
void splittreap(ll node, ll nr, ll nr2){
    if(node == 0){
        lid = 0;
        rid = 0;
        return;
    }
    if(v[node].x < nr || (v[node].x == nr && v[node].val <= nr2)){
        splittreap(v[node].r, nr, nr2);
        v[node].r = lid;
        lid = node;
    }else{
        splittreap(v[node].l, nr, nr2);
        v[node].l = rid;
        rid = node;
    }
}
ll ins(ll p, ll x, ll y, ll val){
    if(p == 0){
        v[cnt] = {0,0,x,y,val};
        cnt++;
        return cnt - 1;
    }
    splittreap(p, x, val);
    v[cnt] = {0,0,x,y,val};
    p = mergetreap(lid, cnt);
    p = mergetreap(p, rid);
    cnt++;
    return p;
}
ll del(ll p, ll x, ll val){
    splittreap(p, x, val - 1);
    ll leftside = lid;
    ll rightside = rid;
    splittreap(rid, x, val);
    ll id = mergetreap(leftside, rid);
    return id;
}
void add(ll pt,ll x,ll y){
    if(pt == 0)return;
    if(cnt2 > k)return;
    ans[cnt2++] = max(abs(v[pt].x - y),abs(v[pt].val - x));
    add(v[pt].l,x,y);
    add(v[pt].r,x,y);
}
ll get(ll x){
    cnt = 1;
    cnt2 = 0;
    ll treapid = 0;
    ll pt = 0;
    for(ll i = 0;i < n;i++){
        while(pt < i && v2[pt].x < v2[i].x - x){
            treapid = del(treapid,v2[pt].y,v2[pt].x);
            pt++;
        }
        splittreap(treapid,v2[i].y - x,-inf);
        ll p1 = lid;
        splittreap(rid,v2[i].y + x + 1,-inf);
        ll p2 = lid;
        ll p3 = rid;
        //dbgtreap(p2);
        //cout<<"p2 "<<p2<<' '<<i<<' '<<x<<' '<<v2[i].x<<' '<<v2[i].y<<'\n';
        add(p2,v2[i].x,v2[i].y);
        treapid = mergetreap(p1,p2);
        treapid = mergetreap(treapid,p3);
        treapid = ins(treapid,v2[i].y,rand()%69420,v2[i].x);
        if(cnt2 > k)return cnt2;
    }
    return cnt2;
}
int main(){
    cin>>n>>k;
    for(ll i = 0;i < n;i++){
        cin>>v2[i].x>>v2[i].y;
        v2[i] = {v2[i].x + v2[i].y,v2[i].x - v2[i].y};
    }
    sort(v2,v2 + n,[&](point a,point b){
         return a.x < b.x;
    });
    ll l = 0,r = inf;
    while(l != r){
        ll mij = (l + r)/2;
        if(get(mij) <= k){
            l = mij + 1;
        }else r = mij;
    }
    get(l - 1);
    sort(ans,ans + cnt2);
    while(cnt2 < k){
        ans[cnt2++] = l;
    }
    for(ll i = 0;i < k;i++){
        cout<<ans[i]<<'\n';
    }
    return 0;
}
///i am losing my mind

Compilation message

road_construction.cpp: In function 'll del(ll, ll, ll)':
road_construction.cpp:67:8: warning: unused variable 'rightside' [-Wunused-variable]
   67 |     ll rightside = rid;
      |        ^~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 5204 KB Output is correct
2 Correct 127 ms 5036 KB Output is correct
3 Correct 88 ms 5016 KB Output is correct
4 Correct 86 ms 4948 KB Output is correct
5 Correct 115 ms 3920 KB Output is correct
6 Correct 8 ms 348 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 367 ms 20120 KB Output is correct
2 Correct 389 ms 20128 KB Output is correct
3 Correct 80 ms 4948 KB Output is correct
4 Correct 323 ms 20048 KB Output is correct
5 Correct 341 ms 20024 KB Output is correct
6 Correct 337 ms 20308 KB Output is correct
7 Correct 310 ms 19712 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 364 ms 20564 KB Output is correct
2 Correct 369 ms 20564 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 154 ms 16840 KB Output is correct
5 Correct 1452 ms 19256 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 364 ms 20564 KB Output is correct
2 Correct 369 ms 20564 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 154 ms 16840 KB Output is correct
5 Correct 1452 ms 19256 KB Output is correct
6 Correct 514 ms 20976 KB Output is correct
7 Correct 487 ms 20816 KB Output is correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 398 ms 19200 KB Output is correct
11 Correct 154 ms 18784 KB Output is correct
12 Correct 1594 ms 21224 KB Output is correct

Subtask #5
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 5204 KB Output is correct
2 Correct 127 ms 5036 KB Output is correct
3 Correct 88 ms 5016 KB Output is correct
4 Correct 86 ms 4948 KB Output is correct
5 Correct 115 ms 3920 KB Output is correct
6 Correct 8 ms 348 KB Output is correct
7 Correct 1536 ms 11856 KB Output is correct
8 Correct 1553 ms 11856 KB Output is correct
9 Correct 87 ms 4948 KB Output is correct
10 Correct 629 ms 11124 KB Output is correct
11 Correct 359 ms 10920 KB Output is correct
12 Correct 1112 ms 11856 KB Output is correct
13 Correct 912 ms 10252 KB Output is correct

Subtask #6
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 5204 KB Output is correct
2 Correct 127 ms 5036 KB Output is correct
3 Correct 88 ms 5016 KB Output is correct
4 Correct 86 ms 4948 KB Output is correct
5 Correct 115 ms 3920 KB Output is correct
6 Correct 8 ms 348 KB Output is correct
7 Correct 367 ms 20120 KB Output is correct
8 Correct 389 ms 20128 KB Output is correct
9 Correct 80 ms 4948 KB Output is correct
10 Correct 323 ms 20048 KB Output is correct
11 Correct 341 ms 20024 KB Output is correct
12 Correct 337 ms 20308 KB Output is correct
13 Correct 310 ms 19712 KB Output is correct
14 Correct 364 ms 20564 KB Output is correct
15 Correct 369 ms 20564 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 154 ms 16840 KB Output is correct
18 Correct 1452 ms 19256 KB Output is correct
19 Correct 514 ms 20976 KB Output is correct
20 Correct 487 ms 20816 KB Output is correct
21 Correct 1 ms 2392 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 398 ms 19200 KB Output is correct
24 Correct 154 ms 18784 KB Output is correct
25 Correct 1594 ms 21224 KB Output is correct
26 Correct 1536 ms 11856 KB Output is correct
27 Correct 1553 ms 11856 KB Output is correct
28 Correct 87 ms 4948 KB Output is correct
29 Correct 629 ms 11124 KB Output is correct
30 Correct 359 ms 10920 KB Output is correct
31 Correct 1112 ms 11856 KB Output is correct
32 Correct 912 ms 10252 KB Output is correct
33 Correct 3393 ms 22936 KB Output is correct
34 Correct 3420 ms 22940 KB Output is correct
35 Correct 1717 ms 22236 KB Output is correct
36 Correct 2190 ms 23120 KB Output is correct
37 Correct 1859 ms 23128 KB Output is correct
38 Correct 2547 ms 21652 KB Output is correct