oj.uz

답안 #999175

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
999175 2024-06-15T07:49:57 Z 8pete8 Road Construction (JOI21_road_construction) C++17
27 / 100
 2154 ms 2097152 KB 
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<cassert>
#include<unordered_map>
#include <queue>
#include <cstdint>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
#define int long long
using namespace std;
const int mxn=2e5+5e4+10,inf=1e18,lg=30,mx=1e9,nx=-1e9,minf=-1e9,mod=998244353;
/*
find k cheapest road
we can get the cheapest road for i node with sparse seg?
persist sparse segtee ??TT
*/
int n,k;
struct node{
    pii val;
    node*l,*r;
    node():val({inf,inf}),l(0),r(0){};
};
map<int,vector<int>>mp;
map<int,int>cnt[mxn+10];
struct persist{
    node *root[mxn+10];
    pii get(node *x){return (x==NULL)?make_pair(inf,inf):x->val;}
    void update(int l,int r,node *last,node *&cur,int pos,int val){
        if(last==NULL)cur=new node();
        else cur=new node(*last);
        if(l==r)return void(cur->val={val,pos});
        int mid=l+(r-l)/2;
        if(pos<=mid)update(l,mid,((last==NULL)?last:last->l),cur->l,pos,val);
        else update(mid+1,r,((last==NULL)?last:last->r),cur->r,pos,val);
        cur->val=min(get(cur->l),get(cur->r));
    }
    pii qry(int l,int r,node *cur,int ql,int qr){
        if(cur==NULL||l>qr||r<ql)return {inf,inf};
        if(ql<=l&&r<=qr)return cur->val;
        int mid=l+(r-l)/2;
        return min(qry(l,mid,cur->l,ql,qr),qry(mid+1,r,cur->r,ql,qr));
    }
}t,t2;
void show(){
    cout<<"PPPP\n";
    for(int i=0;i<n;i++){
        for(int j=0;j<=0;j++)cout<<t.qry(nx,mx,t.root[i],j,j).f<<" ";
        cout<<'\n'; 
    }
}
int32_t main(){
    fastio
    cin>>n>>k;
    vector<pii>v(n);
    for(int i=0;i<n;i++)cin>>v[i].f>>v[i].s;
    sort(all(v));
    for(int i=0;i<n;i++)mp[v[i].s].pb(i);
    for(int i=1;i<n;i++){
        //update the last one
        t.update(nx,mx,t.root[i-(i!=0)],t.root[i],v[i-1].s,-v[i-1].f+v[i-1].s);
        t2.update(nx,mx,t2.root[i-(i!=0)],t2.root[i],v[i-1].s,-v[i-1].f-v[i-1].s);
    }
    auto del=[&](int x,int pos){
        return inf;
        if(cnt[x].find(pos)==cnt[x].end())cnt[x][pos]=upper_bound(all(mp[pos]),x-1)-mp[pos].begin()-1;
        cnt[x][pos]--;
        return ((cnt[x][pos]<0)?inf:v[cnt[x][pos]].f);
    };
    auto get=[&](int x){
        pii a=t.qry(nx,mx,t.root[x],v[x].s,mx),b=t2.qry(nx,mx,t2.root[x],nx,v[x].s-1);
        int up;
        if(a.f-v[x].s<b.f+v[x].s){
            up=del(x,a.s);
            if(up!=inf){
                t.update(nx,mx,t.root[x],t.root[x],a.s,-up+a.s);
                t2.update(nx,mx,t2.root[x],t2.root[x],a.s,-up-a.s);
            }
            else t.update(nx,mx,t.root[x],t.root[x],a.s,inf),t2.update(nx,mx,t2.root[x],t2.root[x],a.s,inf);
            return v[x].f+a.f-v[x].s;
        }
        else{
            up=del(x,b.s);
            if(up!=inf){
                t.update(nx,mx,t.root[x],t.root[x],b.s,-up+b.s);
                t2.update(nx,mx,t2.root[x],t2.root[x],b.s,-up-b.s);
            }
            else t.update(nx,mx,t.root[x],t.root[x],b.s,inf),t2.update(nx,mx,t2.root[x],t2.root[x],b.s,inf);
            return v[x].f+b.f+v[x].s;
        }
    };
    priority_queue<pii,vector<pii>,greater<pii>>pq;
    for(int i=0;i<n;i++)pq.push({get(i),i});
    for(int i=0;i<k;i++){
        if(pq.empty())assert(0);
        cout<<pq.top().f<<'\n';
        int x=pq.top().s;
        pq.pop();
        pq.push({get(x),x});
    }
}

/*
3 3
-1 0
0 2
0 0

5 4 
1 -1 
2 0 
-1 0 
0 2 
0 -2

4 6 
0 0 
1 0 
3 0
4 0
*/

Compilation message

road_construction.cpp:32:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
road_construction.cpp:45:10: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   45 |     node():val({inf,inf}),l(0),r(0){};
      |          ^
road_construction.cpp:51:20: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   51 |     pii get(node *x){return (x==NULL)?make_pair(inf,inf):x->val;}
      |                    ^
road_construction.cpp:52:66: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   52 |     void update(int l,int r,node *last,node *&cur,int pos,int val){
      |                                                                  ^
road_construction.cpp:61:48: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   61 |     pii qry(int l,int r,node *cur,int ql,int qr){
      |                                                ^
road_construction.cpp:68:11: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   68 | void show(){
      |           ^
road_construction.cpp:75:14: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   75 | int32_t main(){
      |              ^
road_construction.cpp: In function 'int32_t main()':
road_construction.cpp:87:31: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   87 |     auto del=[&](int x,int pos){
      |                               ^
road_construction.cpp:93:23: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   93 |     auto get=[&](int x){
      |                       ^

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 956 ms 772432 KB Output is correct
2 Correct 985 ms 772652 KB Output is correct
3 Correct 935 ms 769356 KB Output is correct
4 Incorrect 730 ms 762192 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 1967 ms 2097152 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2128 ms 1555508 KB Output is correct
2 Correct 2093 ms 1553848 KB Output is correct
3 Correct 2 ms 13912 KB Output is correct
4 Correct 1249 ms 1483664 KB Output is correct
5 Correct 1529 ms 1528252 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2128 ms 1555508 KB Output is correct
2 Correct 2093 ms 1553848 KB Output is correct
3 Correct 2 ms 13912 KB Output is correct
4 Correct 1249 ms 1483664 KB Output is correct
5 Correct 1529 ms 1528252 KB Output is correct
6 Correct 2154 ms 1553856 KB Output is correct
7 Correct 2118 ms 1553852 KB Output is correct
8 Correct 2 ms 13912 KB Output is correct
9 Correct 2 ms 13916 KB Output is correct
10 Correct 2138 ms 1550604 KB Output is correct
11 Correct 1267 ms 1483552 KB Output is correct
12 Correct 1437 ms 1528512 KB Output is correct

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 956 ms 772432 KB Output is correct
2 Correct 985 ms 772652 KB Output is correct
3 Correct 935 ms 769356 KB Output is correct
4 Incorrect 730 ms 762192 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 956 ms 772432 KB Output is correct
2 Correct 985 ms 772652 KB Output is correct
3 Correct 935 ms 769356 KB Output is correct
4 Incorrect 730 ms 762192 KB Output isn't correct
5 Halted 0 ms 0 KB -