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Submission #157194

# Submission time Handle Problem Language Result Execution time Memory
157194 2019-10-10T03:17:39 Z manh9203 Examination (JOI19_examination) C++17
2 / 100
 3000 ms 309224 KB 
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
const int N = 3e5 + 5;
long long n,w,h,q,x[N],y[N],z[N],ans[N];
pair<long long,long long> stu[N];
pair<pair<int,int>,long long> com[N];
map<long long,int> idx,idy;
map<pair<int,int>,int> pos;
vector<long long> dmx,dmy,fen[4*N],point[N],query[N],node1[4*N];
vector<pair<long long,int> > node[4*N];
//compress
void build1(int id,int l,int r,int i,int vt){
	if(l>i || r<i){
		return;
	}
	if(l == r){
		node[id].push_back({com[vt].se, vt});
		node1[id].push_back(com[vt].se);
		return;		
	}
	int mid = (l + r) >> 1;
	build1(id<<1, l, mid, i, vt);
	build1(id<<1|1, mid+1, r, i, vt);
	node[id].push_back({com[vt].se, vt});
	node1[id].push_back(com[vt].se);
}

void build(int id,int l,int r){
	if(l == r){
		sort(node[id].begin(), node[id].end());
		sort(node1[id].begin(), node1[id].end());
		for(int i = 0; i < node[id].size(); i++){
			pos[{node[id][i].se, id}] = i + 1;
		}
		fen[id].assign(node[id].size() + 5, 0);
		return;
	}
	int mid = (l + r) >> 1;
	build(id<<1, l, mid);
	build(id<<1|1, mid+1, r);
	sort(node[id].begin(), node[id].end());
	sort(node1[id].begin(), node1[id].end());
	for(int i = 0; i < node[id].size(); i++){
		pos[{node[id][i].se, id}] = i + 1;
	}
	fen[id].assign(node[id].size() + 5, 0);
}

//upd BIT
void upd(int id,int val,int index){
	for(int i = id; i <= node[index].size(); i += (i&-i)){
		fen[index][i] += val;
	}
}
int get_sum(int id,int index){
	int sum = 0;
	for(int i = id; i >= 1; i -= (i&-i)){
		sum += fen[index][i];
	}
	return sum;
}

//sweep update
void update(int id,int l,int r,int i,int vt){
	if(l>i || r<i){
		return;
	}
	if(l == r){
		upd(pos[{vt, id}], 1, id);
		return;
	}
	int mid = (l + r) >> 1;
	update(id<<1, l, mid, i, vt);
	update(id<<1|1, mid+1, r, i, vt);
	upd(pos[{vt, id}], 1, id);
}

//ans query
int get(int id,int l,int r,int i,int j,long long val){
	if(l>j || r<i || i>j){
		return 0;
	}
	if(l>=i && r<=j){
		if(node1[id].size() == 0 || node1[id][node1[id].size()-1] < val){
			return 0;
		}else{
			int dm1 = lower_bound(node1[id].begin(), node1[id].end(), val) - node1[id].begin();
			return get_sum(node1[id].size(), id) - get_sum(dm1, id);
		}
	}
	int mid = (l + r) >> 1;
	return get(id<<1, l, mid, i, j, val) + get(id<<1|1, mid+1, r, i, j, val);
}

//main
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	cin >> n >> q;
	for(int i=1;i<=n;i++){
		cin >> stu[i].fi >> stu[i].se;
		if(idx[stu[i].fi] == 0){
			idx[stu[i].fi] = 1;
			dmx.push_back(stu[i].fi);
		}
		if(idy[stu[i].se] == 0){
			idy[stu[i].se] = 1;
			dmy.push_back(stu[i].se);
		}
	}
	for(int i=1;i<=q;i++){
		cin >> x[i] >> y[i] >> z[i];
		if(idx[x[i]] == 0){
			idx[x[i]] = 1;
			dmx.push_back(x[i]);
		}
		if(idy[y[i]] == 0){
			idy[y[i]] = 1;
			dmy.push_back(y[i]);
		}
	}
	sort(dmx.begin(), dmx.end());
	sort(dmy.begin(), dmy.end());
	w = dmx.size(); h = dmy.size();
	for(int i=0;i<dmx.size();i++){
		idx[dmx[i]] = i+1;
	}
	for(int i=0;i<dmy.size();i++){
		idy[dmy[i]] = i+1;
	}
	for(int i=1;i<=n;i++){
		com[i].fi.fi = idx[stu[i].fi];
		com[i].fi.se = idy[stu[i].se];
		com[i].se = stu[i].fi + stu[i].se;
	}
	for(int i=1;i<=q;i++){
		x[i] = idx[x[i]];
		y[i] = idy[y[i]];
		query[x[i]].push_back(i);
	}
	sort(com+1, com+1+n);
	for(int i=1;i<=n;i++){
		build1(1, 1, h, com[i].fi.se, i);
		point[com[i].fi.fi].push_back(i);
	}
	build(1, 1, h);
	for(int i = w; i >= 1; i--){
		for(int j: point[i]){
			update(1, 1, h, com[j].fi.se, j);
		}
		for(int j: query[i]){
			ans[j] = get(1, 1, h, y[j], h, z[j]);
		}
	}
	for(int i=1;i<=q;i++){
		cout << ans[i] << "\n";
	}
}

Compilation message

examination.cpp: In function 'void build(int, int, int)':
examination.cpp:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < node[id].size(); i++){
                  ~~^~~~~~~~~~~~~~~~~
examination.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < node[id].size(); i++){
                 ~~^~~~~~~~~~~~~~~~~
examination.cpp: In function 'void upd(int, int, int)':
examination.cpp:53:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = id; i <= node[index].size(); i += (i&-i)){
                  ~~^~~~~~~~~~~~~~~~~~~~~
examination.cpp: In function 'int main()':
examination.cpp:126:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<dmx.size();i++){
              ~^~~~~~~~~~~
examination.cpp:129:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<dmy.size();i++){
              ~^~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 95 ms 99064 KB Output is correct
2 Correct 95 ms 99112 KB Output is correct
3 Correct 98 ms 99072 KB Output is correct
4 Correct 94 ms 99036 KB Output is correct
5 Correct 95 ms 99100 KB Output is correct
6 Correct 95 ms 99016 KB Output is correct
7 Correct 145 ms 105284 KB Output is correct
8 Correct 147 ms 105336 KB Output is correct
9 Correct 148 ms 105336 KB Output is correct
10 Correct 110 ms 101312 KB Output is correct
11 Correct 136 ms 104796 KB Output is correct
12 Correct 103 ms 100728 KB Output is correct
13 Correct 145 ms 105336 KB Output is correct
14 Correct 145 ms 105320 KB Output is correct
15 Correct 147 ms 105336 KB Output is correct
16 Correct 127 ms 104668 KB Output is correct
17 Correct 106 ms 100472 KB Output is correct
18 Correct 99 ms 100088 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3056 ms 309224 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3056 ms 309224 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 95 ms 99064 KB Output is correct
2 Correct 95 ms 99112 KB Output is correct
3 Correct 98 ms 99072 KB Output is correct
4 Correct 94 ms 99036 KB Output is correct
5 Correct 95 ms 99100 KB Output is correct
6 Correct 95 ms 99016 KB Output is correct
7 Correct 145 ms 105284 KB Output is correct
8 Correct 147 ms 105336 KB Output is correct
9 Correct 148 ms 105336 KB Output is correct
10 Correct 110 ms 101312 KB Output is correct
11 Correct 136 ms 104796 KB Output is correct
12 Correct 103 ms 100728 KB Output is correct
13 Correct 145 ms 105336 KB Output is correct
14 Correct 145 ms 105320 KB Output is correct
15 Correct 147 ms 105336 KB Output is correct
16 Correct 127 ms 104668 KB Output is correct
17 Correct 106 ms 100472 KB Output is correct
18 Correct 99 ms 100088 KB Output is correct
19 Execution timed out 3056 ms 309224 KB Time limit exceeded
20 Halted 0 ms 0 KB -