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Submission #444055

# Submission time Handle Problem Language Result Execution time Memory
444055 2021-07-13T04:13:18 Z minhcool Examination (JOI19_examination) C++17
22 / 100
 3000 ms 23128 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 = 1000;
 
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 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 37 ms 1092 KB Output is correct
8 Correct 37 ms 1100 KB Output is correct
9 Correct 40 ms 1096 KB Output is correct
10 Correct 26 ms 836 KB Output is correct
11 Correct 37 ms 1104 KB Output is correct
12 Correct 29 ms 856 KB Output is correct
13 Correct 12 ms 1100 KB Output is correct
14 Correct 12 ms 1112 KB Output is correct
15 Correct 13 ms 1100 KB Output is correct
16 Correct 11 ms 1116 KB Output is correct
17 Correct 24 ms 884 KB Output is correct
18 Correct 4 ms 844 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 740 ms 23060 KB Output is correct
2 Correct 637 ms 23036 KB Output is correct
3 Correct 668 ms 23060 KB Output is correct
4 Correct 457 ms 19000 KB Output is correct
5 Correct 726 ms 23056 KB Output is correct
6 Correct 532 ms 18992 KB Output is correct
7 Correct 691 ms 23128 KB Output is correct
8 Correct 650 ms 21784 KB Output is correct
9 Correct 797 ms 21772 KB Output is correct
10 Correct 680 ms 22960 KB Output is correct
11 Correct 565 ms 18984 KB Output is correct
12 Correct 391 ms 18680 KB Output is correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 740 ms 23060 KB Output is correct
2 Correct 637 ms 23036 KB Output is correct
3 Correct 668 ms 23060 KB Output is correct
4 Correct 457 ms 19000 KB Output is correct
5 Correct 726 ms 23056 KB Output is correct
6 Correct 532 ms 18992 KB Output is correct
7 Correct 691 ms 23128 KB Output is correct
8 Correct 650 ms 21784 KB Output is correct
9 Correct 797 ms 21772 KB Output is correct
10 Correct 680 ms 22960 KB Output is correct
11 Correct 565 ms 18984 KB Output is correct
12 Correct 391 ms 18680 KB Output is correct
13 Execution timed out 3041 ms 22756 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 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 37 ms 1092 KB Output is correct
8 Correct 37 ms 1100 KB Output is correct
9 Correct 40 ms 1096 KB Output is correct
10 Correct 26 ms 836 KB Output is correct
11 Correct 37 ms 1104 KB Output is correct
12 Correct 29 ms 856 KB Output is correct
13 Correct 12 ms 1100 KB Output is correct
14 Correct 12 ms 1112 KB Output is correct
15 Correct 13 ms 1100 KB Output is correct
16 Correct 11 ms 1116 KB Output is correct
17 Correct 24 ms 884 KB Output is correct
18 Correct 4 ms 844 KB Output is correct
19 Correct 740 ms 23060 KB Output is correct
20 Correct 637 ms 23036 KB Output is correct
21 Correct 668 ms 23060 KB Output is correct
22 Correct 457 ms 19000 KB Output is correct
23 Correct 726 ms 23056 KB Output is correct
24 Correct 532 ms 18992 KB Output is correct
25 Correct 691 ms 23128 KB Output is correct
26 Correct 650 ms 21784 KB Output is correct
27 Correct 797 ms 21772 KB Output is correct
28 Correct 680 ms 22960 KB Output is correct
29 Correct 565 ms 18984 KB Output is correct
30 Correct 391 ms 18680 KB Output is correct
31 Execution timed out 3041 ms 22756 KB Time limit exceeded
32 Halted 0 ms 0 KB -