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Submission #444549

# Submission time Handle Problem Language Result Execution time Memory
444549 2021-07-14T08:37:21 Z minhcool Examination (JOI19_examination) C++17
100 / 100
 1570 ms 26000 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;
 
int ind_students[N];
 
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;
	for(int i = 1; i <= n; i++) ind_students[i] = uomp[students1[i].se];
	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[students2[j].se].se], -1);
					int pos = ind_students[temp.se];
					for(; pos <= n + q; pos += pos & -pos) bit[pos]++;
					//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);
					int pos = ind_students[students2[j].se];
					for(; pos <= n + q; pos += pos & -pos) bit[pos]--;
				}
			} 
			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);
					int pos = ind_students[students2[j].se];
					for(; pos <= n + q; pos += pos & -pos) bit[pos]++;
				}
			}
			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);
					int pos = ind_students[ind];
					for(; pos <= n + q; pos += pos & -pos) bit[pos]++;
				}
				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:70:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |  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 1 ms 332 KB Output is correct
3 Correct 0 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 15 ms 884 KB Output is correct
8 Correct 15 ms 980 KB Output is correct
9 Correct 15 ms 948 KB Output is correct
10 Correct 16 ms 708 KB Output is correct
11 Correct 17 ms 972 KB Output is correct
12 Correct 16 ms 716 KB Output is correct
13 Correct 7 ms 972 KB Output is correct
14 Correct 7 ms 972 KB Output is correct
15 Correct 8 ms 972 KB Output is correct
16 Correct 5 ms 972 KB Output is correct
17 Correct 14 ms 716 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 342 ms 15920 KB Output is correct
2 Correct 332 ms 16040 KB Output is correct
3 Correct 381 ms 16052 KB Output is correct
4 Correct 192 ms 11964 KB Output is correct
5 Correct 336 ms 16008 KB Output is correct
6 Correct 240 ms 11884 KB Output is correct
7 Correct 334 ms 15984 KB Output is correct
8 Correct 334 ms 14748 KB Output is correct
9 Correct 340 ms 14676 KB Output is correct
10 Correct 312 ms 15800 KB Output is correct
11 Correct 177 ms 11720 KB Output is correct
12 Correct 173 ms 11588 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 342 ms 15920 KB Output is correct
2 Correct 332 ms 16040 KB Output is correct
3 Correct 381 ms 16052 KB Output is correct
4 Correct 192 ms 11964 KB Output is correct
5 Correct 336 ms 16008 KB Output is correct
6 Correct 240 ms 11884 KB Output is correct
7 Correct 334 ms 15984 KB Output is correct
8 Correct 334 ms 14748 KB Output is correct
9 Correct 340 ms 14676 KB Output is correct
10 Correct 312 ms 15800 KB Output is correct
11 Correct 177 ms 11720 KB Output is correct
12 Correct 173 ms 11588 KB Output is correct
13 Correct 1193 ms 16300 KB Output is correct
14 Correct 926 ms 16132 KB Output is correct
15 Correct 337 ms 15968 KB Output is correct
16 Correct 1132 ms 12008 KB Output is correct
17 Correct 1259 ms 16020 KB Output is correct
18 Correct 327 ms 12064 KB Output is correct
19 Correct 1301 ms 16196 KB Output is correct
20 Correct 1234 ms 16096 KB Output is correct
21 Correct 1539 ms 15300 KB Output is correct
22 Correct 333 ms 15772 KB Output is correct
23 Correct 183 ms 11836 KB Output is correct
24 Correct 166 ms 11584 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 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 15 ms 884 KB Output is correct
8 Correct 15 ms 980 KB Output is correct
9 Correct 15 ms 948 KB Output is correct
10 Correct 16 ms 708 KB Output is correct
11 Correct 17 ms 972 KB Output is correct
12 Correct 16 ms 716 KB Output is correct
13 Correct 7 ms 972 KB Output is correct
14 Correct 7 ms 972 KB Output is correct
15 Correct 8 ms 972 KB Output is correct
16 Correct 5 ms 972 KB Output is correct
17 Correct 14 ms 716 KB Output is correct
18 Correct 3 ms 716 KB Output is correct
19 Correct 342 ms 15920 KB Output is correct
20 Correct 332 ms 16040 KB Output is correct
21 Correct 381 ms 16052 KB Output is correct
22 Correct 192 ms 11964 KB Output is correct
23 Correct 336 ms 16008 KB Output is correct
24 Correct 240 ms 11884 KB Output is correct
25 Correct 334 ms 15984 KB Output is correct
26 Correct 334 ms 14748 KB Output is correct
27 Correct 340 ms 14676 KB Output is correct
28 Correct 312 ms 15800 KB Output is correct
29 Correct 177 ms 11720 KB Output is correct
30 Correct 173 ms 11588 KB Output is correct
31 Correct 1193 ms 16300 KB Output is correct
32 Correct 926 ms 16132 KB Output is correct
33 Correct 337 ms 15968 KB Output is correct
34 Correct 1132 ms 12008 KB Output is correct
35 Correct 1259 ms 16020 KB Output is correct
36 Correct 327 ms 12064 KB Output is correct
37 Correct 1301 ms 16196 KB Output is correct
38 Correct 1234 ms 16096 KB Output is correct
39 Correct 1539 ms 15300 KB Output is correct
40 Correct 333 ms 15772 KB Output is correct
41 Correct 183 ms 11836 KB Output is correct
42 Correct 166 ms 11584 KB Output is correct
43 Correct 1413 ms 21128 KB Output is correct
44 Correct 1310 ms 25948 KB Output is correct
45 Correct 1037 ms 26000 KB Output is correct
46 Correct 1192 ms 15356 KB Output is correct
47 Correct 1161 ms 24252 KB Output is correct
48 Correct 299 ms 12796 KB Output is correct
49 Correct 1570 ms 25952 KB Output is correct
50 Correct 1238 ms 25836 KB Output is correct
51 Correct 1506 ms 25776 KB Output is correct
52 Correct 1110 ms 24248 KB Output is correct
53 Correct 196 ms 14236 KB Output is correct