제출 #554772

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
554772		Koosha_mv	Road Construction (JOI21_road_construction)	C++14	59 / 100	10033 ms	73908 KiB

road_construction

#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<x.F<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
#define int ll

typedef pair<int,int> pii;

const int N=1e6+99,inf=1e10;
const pii pinf={-10*inf,-1};

int n,k,a[N],b[N],pos[N];
pii seg[N];
vector<int> ans;
vector<pii> vec;
map<int,vector<int>> mark;

void add(int x){
	seg[x+n]={vec[x].F+vec[x].S,x};
	for(x+=n;x>1;x>>=1){
		seg[x>>1]=max(seg[x],seg[x^1]);
	}
}
void del(int x){
	seg[x+n]=pinf;
	for(x+=n;x>1;x>>=1){
		seg[x>>1]=max(seg[x],seg[x^1]);
	}
}
pii get(int l,int r){
	pii res=pinf;
	for(l+=n,r+=n;l<r;l>>=1,r>>=1){
		if(l&1) maxm(res,seg[l++]);
		if(r&1) maxm(res,seg[--r]);
	}
	return res;
}
bool check(int val,int type=0){
	fill(seg,seg+N,pinf);
	ans.clear();
	int cnt=0;
	for(auto p : mark){
		vector<int> v=p.S;
		for(auto x : v) add(x);
		for(auto x : v){
			int p=upper_bound(all(vec),mp(vec[x].F,-inf))-vec.begin();
			vector<int> op;
			for(pii e=get(0,p);vec[x].F+vec[x].S-e.F<=val;e=get(0,p)){
				cnt++;
				op.pb(e.S);
				del(e.S);
				if(type==1) ans.pb(vec[x].F+vec[x].S-e.F);
				if(cnt>=k) return 0;
			}
			for(auto id : op) add(id);
		}
	}
	return 1;
}
vector<int> solve(){
	f(i,0,n) vec.pb({a[i],b[i]});
	sort(all(vec));
	f(i,0,n) pos[i]=lower_bound(all(vec),mp(a[i],b[i]))-vec.begin();
	f(i,0,n) mark[b[i]].pb(pos[i]);
	
	int l=0,r=inf;
	while(l+1<r){
		int mid=(l+r)>>1;
		if(check(mid)) l=mid;
		else r=mid;
	}
	check(l,1);
	vec.clear();
	mark.clear();
	while(ans.size()<k) ans.pb(r);
	return ans;
}

int32_t main(){
	ios:: sync_with_stdio(0), cin.tie(0), cout.tie(0);
	map<pair<int,int>,int> cnt;
	cin>>n>>k;
	f(i,0,n){
		cin>>a[i]>>b[i];
		if(++cnt[mp(a[i],b[i])]>1) assert(0);
	}
	vector<int> A,B;
	A=solve();
	f(i,0,n) a[i]=-a[i],swap(a[i],b[i]);
	B=solve();
	for(auto x : B) A.pb(x);
	sort(all(A));
	f(i,0,k) cout<<A[i]<<" ";
}
/*
3 2
0 1
0 0
2 0

3 2
-1 0
0 0
0 2
*/

컴파일 시 표준 에러 (stderr) 메시지

road_construction.cpp: In function 'std::vector<long long int> solve()':
road_construction.cpp:92:18: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   92 |  while(ans.size()<k) ans.pb(r);
      |        ~~~~~~~~~~^~

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