Submission #1286969

#	Time	Username	Problem	Language	Result	Execution time	Memory
1286969		kerem	역사적 조사 (JOI14_historical)	C++20	40 / 100	4091 ms	35108 KiB

historic

#include <bits/stdc++.h>
using namespace std;
//~ #define int int64_t
#define pb push_back
#define emb emplace_back
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
#define sp << " " <<
#define N 300000
#define inf (int)1e9
typedef pair<int,int> ii;
typedef tuple<int,int,int> iii;

const int kok=320;
struct Item{
	int l,r,i;
	Item(int ll,int rr,int ii){
		l=ll;r=rr;i=ii;
	}
	bool operator <(Item other){
		return make_pair(l/kok,r)<make_pair(other.l/kok,other.r);
	}
};

struct Node{
	int l,r;
	long long val;
	Node(){l=r=val=0;}
};
vector<Node> st;
int cnt=0;
int addNode(){
	st.pb(Node());
	return cnt++;	
}
int update(int node,int l,int r,int qx,int t){
	if(r<qx || qx<l) return node;
	if(!node) node=addNode();
	if(l==r){
		st[node].val+=t;
		return node;
	}
	int mid=(l+r)/2;
	st[node].l=update(st[node].l,l,mid,qx,t);
	st[node].r=update(st[node].r,mid+1,r,qx,t);
	st[node].val=max(st[st[node].l].val,st[st[node].r].val);
	return node;
}

void solve(){
	int n,q;
	cin >> n >> q;
	int a[n+1];
	vector<Item> query;
	for(int i=1;i<=n;i++)
		cin >> a[i];
	for(int i=0;i<q;i++){
		int l,r;
		cin >> l >> r;
		query.emb(l,r,i);
	}
	sort(all(query));
	int l=1,r=0;
	long long ans[q];
	addNode();addNode();
	for(auto [ql,qr,i]:query){
		while(r<qr){
			++r;update(1,1,1e9,a[r],a[r]);
		}
		while(r>qr){
			update(1,1,1e9,a[r],-a[r]);--r;
		}
		while(l<ql){
			update(1,1,1e9,a[l],-a[l]);++l;
		}
		while(l>ql){
			--l;update(1,1,1e9,a[l],a[l]);
		}
		ans[i]=st[1].val;
	}
	for(int i=0;i<q;i++)
		cout << ans[i] << "\n";
}
int32_t main(){
	//~ freopen("hopscotch.in","r",stdin);
	//~ freopen("hopscotch.out","w",stdout);
	
	cout << fixed << setprecision(0);
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);cout.tie(NULL);
	
	int test=1;
	//~ cin >> test;
	while(test--) solve();
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 25 / 25
• Subtask 4: 0 / 60