Submission #1260768

#	Time	Username	Problem	Language	Result	Execution time	Memory
1260768		PlayVoltz	Sails (IOI07_sails)	C++20	30 / 100	1097 ms	14404 KiB

sails

#include <cstdio>
#include <stdio.h>
#include <stdbool.h>
#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
#include <cassert>
#include <random>
#include <chrono>
#include <fstream>
using namespace std;

#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second

struct node{
	int s, e, m, val;
	node *l, *r;
	
	node(int S, int E){
		s = S, e = E, m = (s+e)/2;
		val=0;
		if (s!=e){
			l = new node(s, m);
			r = new node(m+1, e);
		}
	}
	void up(int ind, int nv){
		if (s==e)val+=nv;
		else{
			if (ind<=m)l->up(ind, nv);
			else r->up(ind, nv);
			val = min(l->val, r->val);
		}
	}
	int lbs(int i){
		if (s==e){
			if (val&&s<=i)return s;
			return -1;
		}
		int res=r->lbs(i);
		if (res==-1)return l->lbs(i);
		return res;
	}
	int rbs(int i){
		if (s==e){
			if (val&&s>=i)return s;
			return LLONG_MAX/2;
		}
		int res=l->rbs(i);
		if (res==LLONG_MAX/2)return r->rbs(i);
		return res;
	}
	int query(int i){
		if (s==e)return val;
		if (i<=m)return l->query(i);
		return r->query(i);
	}
}*st;

int32_t main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n, ans=0;
	cin>>n;
	vector<pii> vect(n);
	st = new node(0, 100005);
	for (int i=0; i<n; ++i)cin>>vect[i].fi>>vect[i].se;
	sort(vect.begin(), vect.end());
	for (int i=0; i<n; ++i){
		int left=max(1ll, st->lbs(vect[i].fi-vect[i].se+1)), right=min(100005ll, st->rbs(vect[i].fi-vect[i].se+1)), c=min(right-vect[i].fi+vect[i].se-1, vect[i].se);
		st->up(left, 1);
		st->up(left+c, -1);
		if (right<=vect[i].fi){
			st->up(right, 1);
			st->up(vect[i].fi+1, -1);
		}
	}
	for (int i=1, sum=0; i<=n; ++i)sum+=st->query(i), ans+=sum*(sum-1)/2;
	cout<<ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10