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Submission #444041

# Submission time Handle Problem Language Result Execution time Memory
444041 2021-07-13T03:55:57 Z minhcool Examination (JOI19_examination) C++17
22 / 100
 3000 ms 23300 KB 
#include<bits/stdc++.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 = 350;
 
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];
 
void upd(int pos, int val){
	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
		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;
				int x = que.top().fi;
				if(x < queries[it].fi.fi) break;
				//cout << x << " " << que.size() << "\n";
				in[que.top().se] = 1;
				upd(uomp[students1[que.top().se].se], 1);
				que.pop();
			}
			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, (i + 1) * block); j++){
			int tmp = students2[j].se;
			//cout << j << " " << tmp << "\n";
			se.insert({students1[tmp].fi, tmp});
		}
	}
	for(int i = 1; i <= q; i++) cout << answer[i] << "\n";
}
 
signed main(){
	ios_base::sync_with_stdio(0);
	process();
}

Compilation message

examination.cpp: In function 'void process()':
examination.cpp:66:19: 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]
   66 |  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 0 ms 332 KB Output is correct
7 Correct 17 ms 1100 KB Output is correct
8 Correct 18 ms 1184 KB Output is correct
9 Correct 17 ms 1100 KB Output is correct
10 Correct 12 ms 844 KB Output is correct
11 Correct 18 ms 1152 KB Output is correct
12 Correct 11 ms 844 KB Output is correct
13 Correct 8 ms 1100 KB Output is correct
14 Correct 8 ms 1172 KB Output is correct
15 Correct 9 ms 1176 KB Output is correct
16 Correct 9 ms 1120 KB Output is correct
17 Correct 11 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 965 ms 23212 KB Output is correct
2 Correct 981 ms 23236 KB Output is correct
3 Correct 1192 ms 23300 KB Output is correct
4 Correct 511 ms 19232 KB Output is correct
5 Correct 1103 ms 23120 KB Output is correct
6 Correct 720 ms 19156 KB Output is correct
7 Correct 981 ms 23144 KB Output is correct
8 Correct 994 ms 21944 KB Output is correct
9 Correct 1040 ms 21944 KB Output is correct
10 Correct 917 ms 23096 KB Output is correct
11 Correct 691 ms 19148 KB Output is correct
12 Correct 571 ms 18744 KB Output is correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 965 ms 23212 KB Output is correct
2 Correct 981 ms 23236 KB Output is correct
3 Correct 1192 ms 23300 KB Output is correct
4 Correct 511 ms 19232 KB Output is correct
5 Correct 1103 ms 23120 KB Output is correct
6 Correct 720 ms 19156 KB Output is correct
7 Correct 981 ms 23144 KB Output is correct
8 Correct 994 ms 21944 KB Output is correct
9 Correct 1040 ms 21944 KB Output is correct
10 Correct 917 ms 23096 KB Output is correct
11 Correct 691 ms 19148 KB Output is correct
12 Correct 571 ms 18744 KB Output is correct
13 Execution timed out 3055 ms 21608 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 0 ms 332 KB Output is correct
7 Correct 17 ms 1100 KB Output is correct
8 Correct 18 ms 1184 KB Output is correct
9 Correct 17 ms 1100 KB Output is correct
10 Correct 12 ms 844 KB Output is correct
11 Correct 18 ms 1152 KB Output is correct
12 Correct 11 ms 844 KB Output is correct
13 Correct 8 ms 1100 KB Output is correct
14 Correct 8 ms 1172 KB Output is correct
15 Correct 9 ms 1176 KB Output is correct
16 Correct 9 ms 1120 KB Output is correct
17 Correct 11 ms 884 KB Output is correct
18 Correct 4 ms 844 KB Output is correct
19 Correct 965 ms 23212 KB Output is correct
20 Correct 981 ms 23236 KB Output is correct
21 Correct 1192 ms 23300 KB Output is correct
22 Correct 511 ms 19232 KB Output is correct
23 Correct 1103 ms 23120 KB Output is correct
24 Correct 720 ms 19156 KB Output is correct
25 Correct 981 ms 23144 KB Output is correct
26 Correct 994 ms 21944 KB Output is correct
27 Correct 1040 ms 21944 KB Output is correct
28 Correct 917 ms 23096 KB Output is correct
29 Correct 691 ms 19148 KB Output is correct
30 Correct 571 ms 18744 KB Output is correct
31 Execution timed out 3055 ms 21608 KB Time limit exceeded
32 Halted 0 ms 0 KB -