Submission #1048175

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048175		Minbaev	Examination (JOI19_examination)	C++17	20 / 100	119 ms	12484 KiB

examination

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
 
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
 
using namespace std;
using namespace __gnu_pbds;
 
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define f first
#define s second
#define int long long
#define ll long long
#define pii pair<int,int>
#define ar array
 
template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
 
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
 tree_order_statistics_node_update> ordered_set;
 
const int inf = 1e17 + 7;
const int mod = 1e9 + 7;
const int N = 3e5 + 5;
const int md = 998244353;
 
int binpow(int a, int b){
	if(b == 0)return 1;
	if(b % 2 == 0){
		int c = binpow(a,b/2);
		return (c*c)%mod;
	}
	return (binpow(a,b-1)*a)%mod;
}
 
int divi(int a, int b){
	return (a*(binpow(b,mod-2)))%mod;
}
 
int n,m,k;
int t[N*4];

void update(int tl, int tr, int v, int pos){
	if(tl == tr){
		t[v] = 1;
		//~ cout << tr << " " << v << "\n";
		//~ cout << "\n";
		return;
	}
	int tm = (tl+tr)/2;
	
	//~ cout << tl << " " << tr << " " << tm << " " << pos << "\n";
	if(pos <= tm)
		update(tl,tm,v*2,pos);
	else
		update(tm+1,tr,v*2+1,pos);
		
	t[v] = t[v*2] + t[v*2+1];
}

int get(int tl, int tr, int v, int l, int r){
	if(r < tl || tr < l)return 0;
	
	if(l <= tl && tr <= r){
		return t[v];
	}
	int tm = (tl+tr)/2;
	
	return get(tl,tm,v*2,l,r) + get(tm+1,tr,v*2+1,l,r);
}


void solve(){
	
	cin >> n >> m;
	
	vector<pii>v(n);
	for(auto &to:v)cin >> to.f >> to.s;
	sort(all(v));
	
	vector<pii>a;
	for(int i = 0;i<n;i++){
		a.pb({v[i].s, i});
	}
	
	sort(all(a));
	
	vector<pair<pii,int>>q(m);
	for(int i = 0;i<m;i++){
		int p;
		cin >> q[i].f.s >> q[i].f.f >> p;
		q[i].s = i;
	}
	
	vector<int>ans1(m);
	sort(rall(q));
	
	int cur = n - 1;
	for(int i = 0;i<m;i++){
		
		while(cur >= 0 && a[cur].f >= q[i].f.f){
			//~ cout << cur << " " << a[cur].s << "\n";
			update(0,n-1,1,a[cur].s);
			cur -= 1;
		}
		
		//~ cout << "\n";
		
		int l = 0, r = n-1, ans = -1;
		while(l<=r){
			int mid = (l+r)/2;
			
			if(v[mid].f < q[i].f.s){
				l = mid + 1;
			}
			else {
				ans = mid;
				r = mid - 1;
			}
		}
		if(ans == -1)ans1[q[i].s] = 0;
		else ans1[q[i].s] = get(0, n-1, 1, ans, n-1);
		//~ cout << ans << " " << n-1 << "\n";
	}
	
	for(auto to:ans1)cout << to << "\n";
	
	
	
	
	

}
/*
5 4
35 100
70 70
45 15
80 40
20 95
20 50 0
10 10 0
60 60 0
0 100 0
*/
 signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	//~ ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt;
	while(tt--)solve();
 
}
 

• Subtask 1: 0 / 2
• Subtask 2: 20 / 20
• Subtask 3: 0 / 21
• Subtask 4: 0 / 57