oj.uz

Submission #444518

# Submission time Handle Problem Language Result Execution time Memory
444518 2021-07-14T08:10:14 Z minhcool Examination (JOI19_examination) C++17
43 / 100
 3000 ms 19348 KB 
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
 
#define hash hashy
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, r, l) for(int i = r; i >= l; i--)
 
typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;
 
const int N = 2e5 + 5, block = 700;
 
const int oo = 1e18 + 7, mod = 1e9 + 7;
 
int n, q;
 
unordered_map<int, int> uomp;
vector<int> vc;
 
iii queries[N];
ii students1[N], students2[N];
 
vector<int> srt[N/block];
 
int bit[N];
bool in[N];
 
int answer[N];
int counter = 0;
 
void upd(int pos, int val){
	counter++;
	for(; pos <= n + q; pos += pos & -pos) bit[pos] += val;
}
 
int get(int pos){
	int ans = 0;
	for(; pos; pos -= pos & -pos) ans += bit[pos];
	return ans;
}
 
bool cmp(int a, int b){
	return (queries[a].fi.fi > queries[b].fi.fi);
}
 
ii que[N];
 
void process(){
	cin >> n >> q;
	vector<int> vc;
	for(int i = 1; i <= n; i++){
		cin >> students1[i].fi >> students1[i].se;
		vc.pb(students1[i].se);
		students2[i] = {students1[i].fi + students1[i].se, i};
	}
	//if(n == 100000 && q == 100000 && students1[i].fi == 92665) return;
	sort(students2 + 1, students2 + n + 1);
	for(int i = 1; i <= q; i++){
		cin >> queries[i].fi.fi >> queries[i].fi.se >> queries[i].se;
		vc.pb(queries[i].fi.se);
		int pos = lower_bound(students2 + 1, students2 + n + 1, make_pair(queries[i].se, 0)) - students2;
		srt[pos / block].pb(i);
	}
	sort(vc.begin(), vc.end());
	vc.resize(unique(vc.begin(), vc.end()) - vc.begin());
	for(int i = 0; i < vc.size(); i++) uomp[vc[i]] = i + 1;
	set<ii> se;
	for(int i = n/block + 2; i >= 0; i--){// l = (i * block), r = (i + 1) * block - 1
		//cout << i << "\n";
		int itr = 0;
		for(set<ii>::iterator it = se.begin(); it != se.end(); it++){
			itr++;
			que[itr] = (*it);
		}
		//stack<ii> que;
		//for(set<ii>::iterator it = se.begin(); it != se.end(); it++) que.push(it);
		sort(srt[i].begin(), srt[i].end(), cmp);
		for(int j = 1; j <= n + q; j++) bit[j] = 0;
		for(int j = 1; j <= n; j++) in[j] = 0; 
		int lst = min(n + 1, (i + 1) * block);
		vector<ii> vc1;
		for(int j = max(1, i * block); j < min(n + 1, (i + 1) * block); j++){
			int tmp = students2[j].se;
			//if(!tmp) cout << j << " " << tmp << "\n";
			vc1.pb({students1[tmp].fi, tmp});
		}
		sort(vc1.begin(), vc1.end());
		for(auto it : srt[i]){
			//cout << it << " " << i << "\n";
				while(1){
					if(!itr) break;
					ii temp = que[itr];
					//int x = que.top().fi;
					if(temp.fi < queries[it].fi.fi) break;
					//cout << x << " " << que.size() << "\n";
					in[temp.se] = 1;
					upd(uomp[students1[temp.se].se], 1);
					itr--;
				}
			int temp = lower_bound(students2 + 1, students2 + n + 1, make_pair(queries[it].se, 0)) - students2;
			//cout << it << " " << temp << "\n";
			//cout << lst << " " << temp << " " << queries[it].se << "\n";
			//continue;
			for(int j = lst; j < temp; j++){
				if(in[students2[j].se]){
					in[students2[j].se] = 0;
					upd(uomp[students1[students2[j].se].se], -1);
				}
			} 
			for(int j = temp; j < lst; j++){
				if(students1[students2[j].se].fi >= queries[it].fi.fi && !in[students2[j].se]){
					in[students2[j].se] = 1;
					upd(uomp[students1[students2[j].se].se], 1);
				}
			}
			lst = temp;
			while(1){
				if(!vc1.size()) break;
				if(vc1.back().fi < queries[it].fi.fi) break;
				int ind = vc1.back().se;
				if(!in[ind] && students1[ind].fi + students1[ind].se >= queries[it].se){
					in[ind] = 1;
					//assert(ind);
					upd(uomp[students1[ind].se], 1);
				}
				vc1.pop_back();
				//cout << vc1.size() << "\n";
			}
			answer[it] = get(n + q) - get(uomp[queries[it].fi.se] - 1);
		}
		for(int j = i * block; j < min(n + 1, (i + 1) * block); j++){
			int tmp = students2[j].se;
			//cout << j << " " << tmp << "\n";
			se.insert({students1[tmp].fi, tmp});
		}
	}
	//cout << counter << "\n";
	//cout << (double)clock() / CLOCKS_PER_SEC;
	for(int i = 1; i <= q; i++) cout << answer[i] << "\n";
}
 
signed main(){
	ios_base::sync_with_stdio(0);
	//freopen("exam.txt", "r", stdin);
	process();
}

Compilation message

examination.cpp:20:21: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   20 | const int oo = 1e18 + 7, mod = 1e9 + 7;
      |                ~~~~~^~~
examination.cpp: In function 'void process()':
examination.cpp:73:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |  for(int i = 0; i < vc.size(); i++) uomp[vc[i]] = i + 1;
      |                 ~~^~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 23 ms 872 KB Output is correct
8 Correct 22 ms 912 KB Output is correct
9 Correct 28 ms 940 KB Output is correct
10 Correct 17 ms 588 KB Output is correct
11 Correct 24 ms 972 KB Output is correct
12 Correct 17 ms 716 KB Output is correct
13 Correct 6 ms 948 KB Output is correct
14 Correct 6 ms 972 KB Output is correct
15 Correct 7 ms 972 KB Output is correct
16 Correct 5 ms 972 KB Output is correct
17 Correct 16 ms 640 KB Output is correct
18 Correct 3 ms 588 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 469 ms 15580 KB Output is correct
2 Correct 414 ms 15564 KB Output is correct
3 Correct 395 ms 15712 KB Output is correct
4 Correct 213 ms 11508 KB Output is correct
5 Correct 409 ms 15572 KB Output is correct
6 Correct 300 ms 11552 KB Output is correct
7 Correct 382 ms 15644 KB Output is correct
8 Correct 388 ms 14336 KB Output is correct
9 Correct 382 ms 14476 KB Output is correct
10 Correct 351 ms 15392 KB Output is correct
11 Correct 204 ms 11464 KB Output is correct
12 Correct 172 ms 11160 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 469 ms 15580 KB Output is correct
2 Correct 414 ms 15564 KB Output is correct
3 Correct 395 ms 15712 KB Output is correct
4 Correct 213 ms 11508 KB Output is correct
5 Correct 409 ms 15572 KB Output is correct
6 Correct 300 ms 11552 KB Output is correct
7 Correct 382 ms 15644 KB Output is correct
8 Correct 388 ms 14336 KB Output is correct
9 Correct 382 ms 14476 KB Output is correct
10 Correct 351 ms 15392 KB Output is correct
11 Correct 204 ms 11464 KB Output is correct
12 Correct 172 ms 11160 KB Output is correct
13 Correct 2370 ms 15700 KB Output is correct
14 Correct 1729 ms 15828 KB Output is correct
15 Correct 433 ms 15608 KB Output is correct
16 Correct 1320 ms 11752 KB Output is correct
17 Correct 1963 ms 15820 KB Output is correct
18 Correct 314 ms 11692 KB Output is correct
19 Correct 2454 ms 15756 KB Output is correct
20 Correct 2326 ms 15792 KB Output is correct
21 Correct 2937 ms 14852 KB Output is correct
22 Correct 368 ms 15524 KB Output is correct
23 Correct 217 ms 11340 KB Output is correct
24 Correct 204 ms 11240 KB Output is correct

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 23 ms 872 KB Output is correct
8 Correct 22 ms 912 KB Output is correct
9 Correct 28 ms 940 KB Output is correct
10 Correct 17 ms 588 KB Output is correct
11 Correct 24 ms 972 KB Output is correct
12 Correct 17 ms 716 KB Output is correct
13 Correct 6 ms 948 KB Output is correct
14 Correct 6 ms 972 KB Output is correct
15 Correct 7 ms 972 KB Output is correct
16 Correct 5 ms 972 KB Output is correct
17 Correct 16 ms 640 KB Output is correct
18 Correct 3 ms 588 KB Output is correct
19 Correct 469 ms 15580 KB Output is correct
20 Correct 414 ms 15564 KB Output is correct
21 Correct 395 ms 15712 KB Output is correct
22 Correct 213 ms 11508 KB Output is correct
23 Correct 409 ms 15572 KB Output is correct
24 Correct 300 ms 11552 KB Output is correct
25 Correct 382 ms 15644 KB Output is correct
26 Correct 388 ms 14336 KB Output is correct
27 Correct 382 ms 14476 KB Output is correct
28 Correct 351 ms 15392 KB Output is correct
29 Correct 204 ms 11464 KB Output is correct
30 Correct 172 ms 11160 KB Output is correct
31 Correct 2370 ms 15700 KB Output is correct
32 Correct 1729 ms 15828 KB Output is correct
33 Correct 433 ms 15608 KB Output is correct
34 Correct 1320 ms 11752 KB Output is correct
35 Correct 1963 ms 15820 KB Output is correct
36 Correct 314 ms 11692 KB Output is correct
37 Correct 2454 ms 15756 KB Output is correct
38 Correct 2326 ms 15792 KB Output is correct
39 Correct 2937 ms 14852 KB Output is correct
40 Correct 368 ms 15524 KB Output is correct
41 Correct 217 ms 11340 KB Output is correct
42 Correct 204 ms 11240 KB Output is correct
43 Execution timed out 3086 ms 19348 KB Time limit exceeded
44 Halted 0 ms 0 KB -