Submission #488964

#	Time	Username	Problem	Language	Result	Execution time	Memory
488964		keta_tsimakuridze	Segments (IZhO18_segments)	C++14	100 / 100	2259 ms	20816 KiB

segments

#include<bits/stdc++.h>
#define f first
#define s second
#define pii pair<int,int>
using namespace std;
const int N = 2e5 + 5, mod = 1e9 + 7; // !
int t, block[N], le[N], ri[N], mink[N], Bl = 1500,removed[N];
vector<pii> all, cur, L[205], R[205];
vector<pii> _(vector<pii> x) {
	vector<pii> new_;
	for(int i = 0; i < x.size(); i++) {
		if(!removed[x[i].s]) new_.push_back(x[i]);
	}
	return new_;
}
void insert(int l,int r,int id) {
	cur.push_back({r - l + 1, id});
	block[id] = -1;
	if(cur.size() == Bl) {
		for(int j = 0; j < cur.size(); j++) all.push_back(cur[j]);
		all = _(all);
		cur.clear();
		sort(all.rbegin(), all.rend());
		for(int j = 0; j <= (all.size())/Bl; j++) L[j].clear(), R[j].clear();
		for(int j = 0; j < all.size(); j++) {
			int bl = j / Bl;
			L[bl].push_back({le[all[j].s], all[j].s});
			R[bl].push_back({ri[all[j].s], all[j].s});
			block[all[j].s] = bl;
		}
		for(int i = 0; i <= (all.size())/Bl; i++) {
			sort(L[i].begin(), L[i].end());
			mink[i] = 2e9 + 33;
			for(int k = 0; k < L[i].size(); k++) mink[i] = min(mink[i], ri[L[i][k].s] - le[L[i][k].s] + 1);
			sort(R[i].begin(), R[i].end());
		}
	}
}
vector<pii> erase(vector<pii> cur, int id) {
		vector<pii> new_;
		for(int i = 0; i < cur.size(); i++) {
			if(cur[i].s != id) new_.push_back(cur[i]);
		}
		return new_;
}
void remove(int id) {
	removed[id] = 1;
	if(block[id] == -1) {
		cur = erase(cur, id);
		return;
	}
	L[block[id]] = erase(L[block[id]], id);
	R[block[id]] = erase(R[block[id]], id);
	return;
}      
int get(int l,int r,int k) {
	if(r - l + 1 < k) return 0;
	int cnt = 0;
	for(int i = 0; i < cur.size(); i++) {
		int id = cur[i].s;
		if(min(ri[id], r)  - max(le[id],l) + 1 >= k) cnt++;
	}
	for(int j = 0; j <= (all.size()) / Bl; j++) {
		if(!L[j].size()) continue;
		if(mink[j] >= k) {
			pii p;
			cnt += L[j].size();
			p = {r - k + 1, 1e7};
			cnt -= L[j].size() - (upper_bound(L[j].begin(), L[j].end(), p) - L[j].begin());
			p = {l + k - 1, -1};
			cnt -= (upper_bound(R[j].begin(), R[j].end(), p) - R[j].begin()) ;
		}
		else {
			for(int i = 0; i < L[j].size(); i++) {
				int id = L[j][i].s;
				if(min(ri[id], r)  - max(le[id],l) + 1 >= k) cnt++;
			}
			break;
		}
	}
	//if((r - l + 1) == k) return cnt/2;
	return cnt;
}
int get(int x,int xo) {
	x = x ^ (t * xo);
	return x; 
}
main() {
	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	#define endl " "
	int n;
	cin >> n >> t;
	int xo = 0, idx = -1;
	for(int i = 1; i <= n; i++) {
		int type; cin >> type;
		if(type == 1) {
			int l,r;
			cin >> l >> r;
			
			l = get(l, xo), r = get(r, xo);
			if(l >= r) swap(l, r);
			le[++idx] = l; ri[idx] = r;
			insert(l,r,idx);
		}
		else if(type == 2) {
			int id;
			cin >> id; 
			remove(id - 1);
		}
		else {
			int l,r,k;
			cin >> l >> r >> k;
			l = get(l, xo), r = get(r, xo);
			if(l > r) swap(l, r);
			xo =  get(l,r,k);
			cout << xo << endl;
		}
	}
}

Compilation message (stderr)

segments.cpp: In function 'std::vector<std::pair<int, int> > _(std::vector<std::pair<int, int> >)':
segments.cpp:11:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for(int i = 0; i < x.size(); i++) {
      |                 ~~^~~~~~~~~~
segments.cpp: In function 'void insert(int, int, int)':
segments.cpp:19:16: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   19 |  if(cur.size() == Bl) {
      |     ~~~~~~~~~~~^~~~~
segments.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |   for(int j = 0; j < cur.size(); j++) all.push_back(cur[j]);
      |                  ~~^~~~~~~~~~~~
segments.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   for(int j = 0; j <= (all.size())/Bl; j++) L[j].clear(), R[j].clear();
      |                  ~~^~~~~~~~~~~~~~~~~~
segments.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |   for(int j = 0; j < all.size(); j++) {
      |                  ~~^~~~~~~~~~~~
segments.cpp:31:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |   for(int i = 0; i <= (all.size())/Bl; i++) {
      |                  ~~^~~~~~~~~~~~~~~~~~
segments.cpp:34:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |    for(int k = 0; k < L[i].size(); k++) mink[i] = min(mink[i], ri[L[i][k].s] - le[L[i][k].s] + 1);
      |                   ~~^~~~~~~~~~~~~
segments.cpp: In function 'std::vector<std::pair<int, int> > erase(std::vector<std::pair<int, int> >, int)':
segments.cpp:41:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |   for(int i = 0; i < cur.size(); i++) {
      |                  ~~^~~~~~~~~~~~
segments.cpp: In function 'int get(int, int, int)':
segments.cpp:59:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |  for(int i = 0; i < cur.size(); i++) {
      |                 ~~^~~~~~~~~~~~
segments.cpp:63:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |  for(int j = 0; j <= (all.size()) / Bl; j++) {
      |                 ~~^~~~~~~~~~~~~~~~~~~~
segments.cpp:74:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |    for(int i = 0; i < L[j].size(); i++) {
      |                   ~~^~~~~~~~~~~~~
segments.cpp: At global scope:
segments.cpp:88:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   88 | main() {
      | ^~~~

• Subtask 1: 7 / 7
• Subtask 2: 15 / 15
• Subtask 3: 16 / 16
• Subtask 4: 17 / 17
• Subtask 5: 20 / 20
• Subtask 6: 25 / 25