Submission #355585

#	Time	Username	Problem	Language	Result	Execution time	Memory
355585		YJU	Divide and conquer (IZhO14_divide)	C++14	100 / 100	255 ms	109676 KiB

divide

#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=1e5+5;
const ll C=1e9+10;
const ld pi=acos(-1);
const ll INF=(1LL<<60);
#define SQ(i) ((ll)(i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()


ll n,d[N],g[N],x[N],ans,ansid;

struct node{
	ll val;
	node *lc,*rc;
}*rt=new node{INF,0,0};

ll get(node *nd){
	if(nd)return nd->val;
	return INF;
}

void ins(node *nd,ll l,ll r,ll to,ll D){
	if(l==r-1){nd->val=min(nd->val,D);return ;}
	ll mid=(l+r)>>1;
	if(to<mid){
		if(!nd->lc)nd->lc=new node{INF,0,0};
		ins(nd->lc,l,mid,to,D);
	}else{
		if(!nd->rc)nd->rc=new node{INF,0,0};
		ins(nd->rc,mid,r,to,D);
	}
	nd->val=min(get(nd->lc),get(nd->rc));
}

ll q(node *nd,ll l,ll r,ll ql,ll qr){
	if(l>=ql&&r<=qr)return nd->val;
	if(l>=qr||r<=ql)return INF;
	ll mid=(l+r)>>1;
	if(!nd->lc)nd->lc=new node{INF,0,0};
	if(!nd->rc)nd->rc=new node{INF,0,0};
	return min(q(nd->lc,l,mid,ql,qr),q(nd->rc,mid,r,ql,qr));
}

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n;
	REP1(i,n){
		cin>>x[i]>>g[i]>>d[i];
		g[i]+=g[i-1];d[i]+=d[i-1];
	}
	ins(rt,0,2*C,d[0]-x[1]+C,0);
	REP1(i,n){
		ansid=q(rt,0,2*C,0,d[i]-x[i]+1+C);
		if(ansid!=INF)ans=max(ans,g[i]-g[ansid]);
		ins(rt,0,2*C,d[i]-x[i+1]+C,i);
	}
	cout<<ans<<"\n";
	return 0;
}

• Subtask 1: 17 / 17
• Subtask 2: 31 / 31
• Subtask 3: 52 / 52