Submission #810806

#	Time	Username	Problem	Language	Result	Execution time	Memory
810806		OrazB	Examination (JOI19_examination)	C++14	20 / 100	284 ms	49080 KiB

examination

#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define pii pair <int, int>
// #define ordered_set tree<pair<pii,int>, null_type,less<pair<pii,int>>, rb_tree_tag,tree_order_statistics_node_update>
#define all(x) (x).begin(), (x).end()
#define ll long long int
#define pb push_back
#define ff first
#define ss second

const int N = 1e6;
int M = 0;
int n, q;
map<int,int> mp;
int now1[N], now2[N];
int pos[N], s[N], t[N], ans[N];
int x[N], y[N], z[N], ind[N];
int f[N][2];
vector<int> E[N];


void add(int x, int y){
	for (int i = x; i <= M; i += i&(-i)){
		f[i][0]++;
		E[i].pb(y);
	}
	for (int i = y; i <= M; i += i&(-i)){
		f[i][1]++;
	}
}
int count(int x, int y){
	int cnt = 0;
	for (int i = x; i > 0; i -= i&(-i)){
		cnt += f[i][0];
		int l = 0, r = E[i].size()-1, pos = -1;
		while(l <= r){
			int md = (l+r)>>1;
			if (E[i][md] > y) r = md - 1;
			else{
				pos = md;
				l = md + 1;
			}
		}
		cnt -= pos+1;
	}
	for (int i = y; i > 0; i -= i&(-i)){
		cnt += f[i][1];
	}
	return cnt;
}

int main ()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> n >> q;
	set<int> dec1, dec2;
	for (int i = 1; i <= n; i++){
		cin >> s[i] >> t[i];
		dec1.insert(s[i]);
		dec2.insert(t[i]);
	}
	for (int i = 1; i <= q; i++){
		cin >> x[i] >> y[i] >> z[i];
		dec1.insert(x[i]);
		dec2.insert(y[i]);
	}
	int T = 0;
	for (auto i : dec1){
		if (!mp[i]++) now1[i] = ++T;
	}
	M = T;
	T = 0;
	mp.clear();
	for (auto i : dec2){
		if (!mp[i]++) now2[i] = ++T;
	}
	M = max(M, T);
	for (int i = 1; i <= n; i++){
		add(now1[s[i]], now2[t[i]]);
	}
	for (int i = 1; i <= M; i++) sort(all(E[i]));
	for (int i = 1; i <= q; i++){
		cout << n-count(now1[x[i]]-1, now2[y[i]]-1) << '\n';
	}
}	

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