제출 #940942

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
940942		8pete8	Building Bridges (CEOI17_building)	C++17	30 / 100	42 ms	73172 KiB

building

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<cassert>
#include<limits.h>
#include<cmath>
#include<set>
#include<numeric> //gcd(a,b)
#include<algorithm>
#include<bitset> 
#include<stack>
using namespace std;
#define ll long long
#define f first
//#define endl "\n"
#define s second
#define pii pair<int,int>
#define pppiiii pair<pii,pii>
#define ppii pair<int,pii>
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define pb push_back
//#define mp make_pair
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-loops")
#define int long long 
const int mxn=1e6,inf=1e9,minf=-1e18,Mxn=2e6,lg=63;
int mod=1e9+7;
int root,n;
void setIO(string name){
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);	
}	
struct line{
	int m,c;
	int get(int x){return (x*m)+c;}
};
struct lichao{
	line v[4*mxn+10];
	void init(int n){
		for(int i=1;i<=4*mxn;i++)v[i]=(line){0,inf};
	}
	void add(int l,int r,int pos,line x){
		int mid=l+(r-l)/2;
		bool m=x.get(mid)<v[pos].get(mid);
		bool lef=x.get(l)<v[pos].get(l);
		if(m)swap(v[pos],x);
		if(l==r)return;
		if(lef!=m)add(l,mid,pos*2,x);
		else add(mid+1,r,pos*2+1,x);
	}
	int qry(int l,int r,int pos,int x){
		int mid=l+(r-l)/2;
		if(l==r)return v[pos].get(x);
		if(x<=mid)return min(qry(l,mid,pos*2,x),v[pos].get(x));
		return min(qry(mid+1,r,pos*2+1,x),v[pos].get(x));
	}
}t;
int v1[mxn+10],v2[mxn+10],dp[mxn+10];
int32_t main(){
	fastio
	int n;cin>>n;
	int mx=0;
	for(int i=1;i<=n;i++)cin>>v1[i],mx=max(mx,v1[i]);
	for(int i=1;i<=n;i++)cin>>v2[i],v2[i]+=v2[i-1];
	t.init(mx);
	t.add(1,mx,1,(line){-2*v1[1],-v2[1]+(v1[1]*v1[1])});
	for(int i=2;i<=n;i++){
		dp[i]=t.qry(1,mx,1,v1[i])+(v1[i]*v1[i])+v2[i-1];
		t.add(1,mx,1,(line){-2*v1[i],dp[i]-v2[i]+(v1[i]*v1[i])});
	}
	cout<<dp[n];
}


/*

*/

컴파일 시 표준 에러 (stderr) 메시지

building.cpp: In function 'void setIO(std::string)':
building.cpp:39:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
building.cpp:40:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40