Submission #287276

#	Time	Username	Problem	Language	Result	Execution time	Memory
287276		Blagojce	Examination (JOI19_examination)	C++11	2 / 100	3025 ms	348928 KiB

examination

#include <bits/stdc++.h> 
#define fr(i, n, m) for(int i = (n); i < (m); i ++)
#define pb push_back
#define st first
#define nd second
#define pq priority_queue
#define all(x) begin(x), end(x)
#include <time.h>
#include <cmath>
 
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
 
const int i_inf = 1e9;
const ll inf = 1e18;
const ll mod = 1000000007;
const ld eps = 1e-13;
const ld pi  = 3.14159265359;
 
mt19937 _rand(time(NULL));
clock_t timer = clock();
const int mxn = 2e5;
 
const ll A = 911382323;
const ll B = 972663749;

int n, m;
int s[mxn], t[mxn];
int a[mxn], b[mxn], c[mxn];
int ans[mxn];
int arr[mxn];

int range1;
int range2;

void compress(){
	vector<pii> v;
	vector<pii> g;
	fr(i, 0, n){
		v.pb({s[i], i+1});
		g.pb({t[i], i+1});
	}
	fr(i, 0, m){
		v.pb({a[i],-i-1});
		g.pb({b[i],-i-1});
	}
	sort(all(v));
	sort(all(g));
	int nwv = 0;
	for(auto u : v){
		nwv ++;
		if(u.nd > 0) s[u.nd-1] = nwv; 
		if(u.nd < 0) a[-u.nd-1] = nwv;
		
	}
	range1 = nwv;
	nwv = 0;
	for(auto u : g){
		nwv ++;
		if(u.nd > 0) t[u.nd-1] = nwv;
		if(u.nd < 0) b[-u.nd-1] = nwv;
	}
	range2 = nwv;
}

const int bsz = 400;
int bit[500][mxn];
int cnt[bsz];
void update(int block, int k, int v){
	while(k < mxn){
		bit[block][k] += v;
		k += k&-k;
	}
}
int sum(int block, int k){
	int s = 0;
	while(k > 0){
		s += bit[block][k];
		k -= k&-k;
	}
	return s;
}

void solve(){
	cin >> n >> m;
	vector<int> v;
	fr(i, 0, n){
		cin >> s[i] >> t[i];
		v.pb(i);
	}
	sort(all(v), [](const int &i, const int &j){
		return s[i]+t[i] > s[j] + t[j];
	});
	int oldsum[n];
	fr(i, 0, n){
		oldsum[i] = s[v[i]] + t[v[i]];
	}
	
	
	vector<int> g;
	fr(i, 0, m){
		cin >> a[i] >> b[i] >> c[i];
		g.pb(i);
	}
	sort(all(g), [](const int &i, const int &j){
		return c[i] > c[j];
	});
	compress();
	
	
	int pos = 0;
	int totb = (range1+bsz-1)/bsz;
	
	for(auto u : g){
		while(pos < n && oldsum[pos] >= c[u]){
			arr[s[v[pos]]] = t[v[pos]];
			int bi = (s[v[pos]]-1)/bsz;
			update(bi, t[v[pos]], +1);
			++cnt[bi];
			++pos;
		}	
		int bi = (a[u]-1)/bsz;
		int p = a[u];
		while((p-1)/bsz == bi){
			if(arr[p] >= b[u]) ans[u] ++;
			++p;
		}
		fr(j, bi+1, totb+1){
			ans[u] += cnt[j]-sum(j, b[u]-1);
		}
	}
	fr(i, 0, m){
		cout<<ans[i]<<endl;
	}
	
}


int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int tc = 1;
	//cin >> tc;
	while(tc--) solve();
}/*
10 1
41304 98327
91921 28251
85635 59191
30361 72671
28949 96958
99041 37826
10245 2726
19387 20282
60366 87723
95388 49726
52302 69501 66009*/

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