oj.uz

Submission #444053

# Submission time Handle Problem Language Result Execution time Memory
444053 2021-07-13T04:11:53 Z minhcool Examination (JOI19_examination) C++17
22 / 100
 3000 ms 25100 KB 
#include<bits/stdc++.h>
#include<time.h>
using namespace std;
 
#define int long long
#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 = 500;
 
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);
}
 
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};
	}
	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, 0LL)) - 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";
		stack<ii> que;
		for(auto it : se) 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);
		for(auto it : srt[i]){
			//cout << it << " " << i << "\n";
			while(1){
				if(!que.size()) break;
				ii temp = que.top();
				//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);
				que.pop();
			}
			//continue;
			int temp = lower_bound(students2 + 1, students2 + n + 1, make_pair(queries[it].se, 0LL)) - 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 <= min(n, (i + 1) * block - 1); 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;
			}
			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: In function 'void process()':
examination.cpp:69:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |  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 1 ms 332 KB Output is correct
2 Correct 1 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 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 23 ms 1272 KB Output is correct
8 Correct 25 ms 1224 KB Output is correct
9 Correct 23 ms 1264 KB Output is correct
10 Correct 15 ms 972 KB Output is correct
11 Correct 22 ms 1228 KB Output is correct
12 Correct 15 ms 840 KB Output is correct
13 Correct 9 ms 1272 KB Output is correct
14 Correct 9 ms 1228 KB Output is correct
15 Correct 9 ms 1228 KB Output is correct
16 Correct 8 ms 1228 KB Output is correct
17 Correct 15 ms 936 KB Output is correct
18 Correct 4 ms 904 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 764 ms 25100 KB Output is correct
2 Correct 802 ms 24776 KB Output is correct
3 Correct 744 ms 24948 KB Output is correct
4 Correct 446 ms 20280 KB Output is correct
5 Correct 810 ms 24356 KB Output is correct
6 Correct 574 ms 20096 KB Output is correct
7 Correct 804 ms 24672 KB Output is correct
8 Correct 886 ms 23440 KB Output is correct
9 Correct 767 ms 23412 KB Output is correct
10 Correct 749 ms 24080 KB Output is correct
11 Correct 515 ms 20220 KB Output is correct
12 Correct 403 ms 19640 KB Output is correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 764 ms 25100 KB Output is correct
2 Correct 802 ms 24776 KB Output is correct
3 Correct 744 ms 24948 KB Output is correct
4 Correct 446 ms 20280 KB Output is correct
5 Correct 810 ms 24356 KB Output is correct
6 Correct 574 ms 20096 KB Output is correct
7 Correct 804 ms 24672 KB Output is correct
8 Correct 886 ms 23440 KB Output is correct
9 Correct 767 ms 23412 KB Output is correct
10 Correct 749 ms 24080 KB Output is correct
11 Correct 515 ms 20220 KB Output is correct
12 Correct 403 ms 19640 KB Output is correct
13 Execution timed out 3066 ms 24296 KB Time limit exceeded
14 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 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 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 23 ms 1272 KB Output is correct
8 Correct 25 ms 1224 KB Output is correct
9 Correct 23 ms 1264 KB Output is correct
10 Correct 15 ms 972 KB Output is correct
11 Correct 22 ms 1228 KB Output is correct
12 Correct 15 ms 840 KB Output is correct
13 Correct 9 ms 1272 KB Output is correct
14 Correct 9 ms 1228 KB Output is correct
15 Correct 9 ms 1228 KB Output is correct
16 Correct 8 ms 1228 KB Output is correct
17 Correct 15 ms 936 KB Output is correct
18 Correct 4 ms 904 KB Output is correct
19 Correct 764 ms 25100 KB Output is correct
20 Correct 802 ms 24776 KB Output is correct
21 Correct 744 ms 24948 KB Output is correct
22 Correct 446 ms 20280 KB Output is correct
23 Correct 810 ms 24356 KB Output is correct
24 Correct 574 ms 20096 KB Output is correct
25 Correct 804 ms 24672 KB Output is correct
26 Correct 886 ms 23440 KB Output is correct
27 Correct 767 ms 23412 KB Output is correct
28 Correct 749 ms 24080 KB Output is correct
29 Correct 515 ms 20220 KB Output is correct
30 Correct 403 ms 19640 KB Output is correct
31 Execution timed out 3066 ms 24296 KB Time limit exceeded
32 Halted 0 ms 0 KB -