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Submission #444515

# Submission time Handle Problem Language Result Execution time Memory
444515 2021-07-14T08:07:32 Z minhcool Examination (JOI19_examination) C++17
43 / 100
 3000 ms 24100 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 = 900;
 
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 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 0 ms 344 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 26 ms 1084 KB Output is correct
8 Correct 26 ms 1100 KB Output is correct
9 Correct 27 ms 1112 KB Output is correct
10 Correct 31 ms 792 KB Output is correct
11 Correct 35 ms 972 KB Output is correct
12 Correct 19 ms 700 KB Output is correct
13 Correct 6 ms 1100 KB Output is correct
14 Correct 6 ms 1100 KB Output is correct
15 Correct 6 ms 984 KB Output is correct
16 Correct 5 ms 972 KB Output is correct
17 Correct 19 ms 792 KB Output is correct
18 Correct 3 ms 716 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 358 ms 18248 KB Output is correct
2 Correct 355 ms 18100 KB Output is correct
3 Correct 336 ms 18068 KB Output is correct
4 Correct 201 ms 13300 KB Output is correct
5 Correct 327 ms 17368 KB Output is correct
6 Correct 241 ms 12560 KB Output is correct
7 Correct 334 ms 18116 KB Output is correct
8 Correct 336 ms 16704 KB Output is correct
9 Correct 331 ms 16712 KB Output is correct
10 Correct 311 ms 17148 KB Output is correct
11 Correct 176 ms 13108 KB Output is correct
12 Correct 169 ms 12308 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 358 ms 18248 KB Output is correct
2 Correct 355 ms 18100 KB Output is correct
3 Correct 336 ms 18068 KB Output is correct
4 Correct 201 ms 13300 KB Output is correct
5 Correct 327 ms 17368 KB Output is correct
6 Correct 241 ms 12560 KB Output is correct
7 Correct 334 ms 18116 KB Output is correct
8 Correct 336 ms 16704 KB Output is correct
9 Correct 331 ms 16712 KB Output is correct
10 Correct 311 ms 17148 KB Output is correct
11 Correct 176 ms 13108 KB Output is correct
12 Correct 169 ms 12308 KB Output is correct
13 Correct 2293 ms 18724 KB Output is correct
14 Correct 1734 ms 18740 KB Output is correct
15 Correct 423 ms 18092 KB Output is correct
16 Correct 1388 ms 13696 KB Output is correct
17 Correct 1799 ms 17760 KB Output is correct
18 Correct 321 ms 12728 KB Output is correct
19 Correct 2308 ms 18692 KB Output is correct
20 Correct 2192 ms 18660 KB Output is correct
21 Correct 2626 ms 17756 KB Output is correct
22 Correct 356 ms 17188 KB Output is correct
23 Correct 212 ms 13168 KB Output is correct
24 Correct 172 ms 12220 KB Output is correct

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 0 ms 344 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 26 ms 1084 KB Output is correct
8 Correct 26 ms 1100 KB Output is correct
9 Correct 27 ms 1112 KB Output is correct
10 Correct 31 ms 792 KB Output is correct
11 Correct 35 ms 972 KB Output is correct
12 Correct 19 ms 700 KB Output is correct
13 Correct 6 ms 1100 KB Output is correct
14 Correct 6 ms 1100 KB Output is correct
15 Correct 6 ms 984 KB Output is correct
16 Correct 5 ms 972 KB Output is correct
17 Correct 19 ms 792 KB Output is correct
18 Correct 3 ms 716 KB Output is correct
19 Correct 358 ms 18248 KB Output is correct
20 Correct 355 ms 18100 KB Output is correct
21 Correct 336 ms 18068 KB Output is correct
22 Correct 201 ms 13300 KB Output is correct
23 Correct 327 ms 17368 KB Output is correct
24 Correct 241 ms 12560 KB Output is correct
25 Correct 334 ms 18116 KB Output is correct
26 Correct 336 ms 16704 KB Output is correct
27 Correct 331 ms 16712 KB Output is correct
28 Correct 311 ms 17148 KB Output is correct
29 Correct 176 ms 13108 KB Output is correct
30 Correct 169 ms 12308 KB Output is correct
31 Correct 2293 ms 18724 KB Output is correct
32 Correct 1734 ms 18740 KB Output is correct
33 Correct 423 ms 18092 KB Output is correct
34 Correct 1388 ms 13696 KB Output is correct
35 Correct 1799 ms 17760 KB Output is correct
36 Correct 321 ms 12728 KB Output is correct
37 Correct 2308 ms 18692 KB Output is correct
38 Correct 2192 ms 18660 KB Output is correct
39 Correct 2626 ms 17756 KB Output is correct
40 Correct 356 ms 17188 KB Output is correct
41 Correct 212 ms 13168 KB Output is correct
42 Correct 172 ms 12220 KB Output is correct
43 Execution timed out 3061 ms 24100 KB Time limit exceeded
44 Halted 0 ms 0 KB -