제출 #634240

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
634240		lovrot	Segments (IZhO18_segments)	C++11	0 / 100	98 ms	65536 KiB

segments

#include <bits/stdc++.h> 

#define pii pair<int, int> 
#define X first
#define Y second
#define pb push_back

using namespace std; 

const int SQR = 5010;
const int N = 2 * 1e5 + 10;

int n, xr, lastans, pos[N];
int b_cnt; //num. of buckets
int cnt; //num of diff. intervals
bool ban[N];
pii intv[N];

vector<vector<int>> lft, rgt;
vector<pii> bkt, bkt2, add;
vector<int> vl, vr, rem;

int intersect(pii a, pii b){ 
	if(a.X > b.X || (a.X == b.X && a.Y > b.Y)){
		swap(a.X, b.X);
		swap(a.Y, b.Y);
	}
	if(a.Y > b.Y) return b.Y - b.X + 1;
	return a.Y - b.X + 1;
}

void bucket(){ 
	for(int x : rem) ban[x] = true;

	sort(add.begin(), add.end());

	int p1 = 0;
	int p2 = 0;
	lft.clear();
	rgt.clear();
	while(p1 < add.size() || p2 < bkt.size()){ 
		if(p1 < add.size() && p2 < bkt.size()){ 
			if(add[p1].X < bkt[p2].X){
				bkt2.pb(add[p1]);
				p1++;
			} else { 
				bkt2.pb(bkt[p2]);
				p2++;
			}
		} else if(p1 < add.size()){ 
			bkt2.pb(add[p1]);
			p2++;
		} else { 
			bkt2.pb(bkt[p2]);
			p2++;
		}
	}
	bkt.clear();
	for(pii x : bkt2){ 
		if(!ban[x.Y])
			bkt.pb(x);
	}
	bkt2.clear();

	for(pii x : bkt){ 
		vl.pb(intv[x.Y].X);
		vr.pb(intv[x.Y].Y);

		if(vl.size() >= SQR){ 
			sort(vl.begin(), vl.end());
			sort(vr.begin(), vr.end());
			lft.pb(vl);
			rgt.pb(vr);
			vl.clear();
			vr.clear();
		}
	}

	if(!vl.empty()){ 
		sort(vl.begin(), vl.end());
		sort(vr.begin(), vr.end());
		lft.pb(vl);
		rgt.pb(vr);
		vl.clear();
		vr.clear();	
	}

	for(int x : rem) ban[x] = false;
	rem.clear();
	add.clear();	
	b_cnt = lft.size();
}

int main(){ 
	for(int i = 0; i < N; i++) pos[i] = i / SQR;

	scanf("%d%d", &n, &xr);
	
	//cout << intersect({1, 2}, {2, 3}) << "\n";

	for(int i = 0; i < n; i++){ 		
		int t;
		cin >> t;
		if(t == 1){ 	
			int l, r;
			scanf("%d%d", &l, &r);
			l = l ^ (t * lastans);
			r = r ^ (t * lastans);

			if(l > r) swap(l, r);

			intv[++cnt] = {l, r};
			add.pb({r - l + 1, cnt});
		} else if(t == 2){ 
			int ind;
			scanf("%d", &ind);
			rem.pb(ind);
		} else { 
			int l, r, k;
			int ans = 0;
			scanf("%d%d%d", &l, &r, &k);
			
			l = l ^ (t * lastans);
			r = r ^ (t * lastans);

			if(l > r) swap(l, r);

			for(int x : rem)
				if(intersect(intv[x], {l, r}) >= k) ans--;
			for(pii x : add){
				if(intersect(intv[x.Y], {l, r}) >= k) ans++;
			}

			// int lo = 0, hi = b_cnt - 1;
			// while(hi - lo > 1){ 
			// 	int mi = (lo + hi) / 2;
			// 	if(bkt[mi].X < k)
			// 		lo = mi;
			// 	else 
			// 		hi = mi;
			// }
			// int b = pos[lo];
			// while(lo < bkt.size() && pos[lo] == b){ 
			// 	if(intersect(intv[bkt[lo].Y], {l, r}) >= k);
			// 	lo++;
			// }
			// b++;
			// for(b; b < b_cnt; b++){ 
			// 	ans += lft[b].size(); 
			// 	ans -= upper_bound(rgt[b].begin(), rgt[b].end(), l + k) - rgt[b].begin();
			// 	ans -= lft[b].end() - upper_bound(lft[b].begin(), lft[b].end(), r - k);
			// }
			cout << ans << "\n";
			lastans = ans;
		}

		if(add.size() + rem.size() >= SQR){ 
			bucket();
		}
	}

	return 0; 
}

컴파일 시 표준 에러 (stderr) 메시지

segments.cpp: In function 'void bucket()':
segments.cpp:41:11: 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 |  while(p1 < add.size() || p2 < bkt.size()){
      |        ~~~^~~~~~~~~~~~
segments.cpp:41:30: 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 |  while(p1 < add.size() || p2 < bkt.size()){
      |                           ~~~^~~~~~~~~~~~
segments.cpp:42:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   if(p1 < add.size() && p2 < bkt.size()){
      |      ~~~^~~~~~~~~~~~
segments.cpp:42:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   if(p1 < add.size() && p2 < bkt.size()){
      |                         ~~~^~~~~~~~~~~~
segments.cpp:50:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |   } else if(p1 < add.size()){
      |             ~~~^~~~~~~~~~~~
segments.cpp: In function 'int main()':
segments.cpp:97:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |  scanf("%d%d", &n, &xr);
      |  ~~~~~^~~~~~~~~~~~~~~~~
segments.cpp:106:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  106 |    scanf("%d%d", &l, &r);
      |    ~~~~~^~~~~~~~~~~~~~~~
segments.cpp:116:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  116 |    scanf("%d", &ind);
      |    ~~~~~^~~~~~~~~~~~
segments.cpp:121:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  121 |    scanf("%d%d%d", &l, &r, &k);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 15
• Subtask 3: 0 / 16
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20
• Subtask 6: 0 / 25