Submission #383019

#	Time	Username	Problem	Language	Result	Execution time	Memory
383019		maximath_1	Segments (IZhO18_segments)	C++11	23 / 100	5047 ms	4800 KiB

segments

#include <stdio.h>
#include <string>
#include <math.h>
#include <algorithm>
#include <vector>
#include <string.h>
#include <numeric>
#include <queue>
#include <assert.h>
#include <map>
#include <set>
#include <limits.h>
using namespace std;
 
#define ll long long
#define ld long double
const int MX = 200005;
const int LG = (int)log2(MX) + 2;
const int BLOCK = 1005;
const ll mod = 1e9 + 7;
const ll inv2 = (mod + 1) / 2;
 
#define gc getchar//_unlocked //can't for window server
void cin(int &x){
	char c = gc(); bool neg = false;
	for(; c < '0'||'9' < c; c = gc())
		if(c == '-') neg=true;
	x = c - '0'; c = gc();
	for(; '0' <= c && c <= '9'; c = gc())
		x = (x << 1) + (x << 3) + (c - '0');
	if(neg) x = -x;
}

int n, t, last_ans;
int lf[MX], rg[MX], len[MX], cnt_id = 0;

bool cmp(int a, int b){
	return len[a] < len[b];
}

int isect(int l1, int r1, int l2, int r2){
	return min(r1, r2) - max(l1, l2) + 1;
}

struct dat{
	vector<int> pend, all;
	vector<int> BL[BLOCK], BR[BLOCK];

	void add(int id){
		pend.push_back(id);
		if(pend.size() >= BLOCK){
			vector<int> tmp;
			sort(pend.begin(), pend.end(), cmp);
			merge(pend.begin(), pend.end(), all.begin(), all.end(), back_inserter(tmp));
			all = tmp; pend.clear();

			for(int bl = 0; bl * BLOCK < all.size(); bl ++)
				BL[bl].clear(), BR[bl].clear();

			for(int i = 0; i < all.size(); i ++){
				int bl = i / BLOCK;
				BL[bl].push_back(lf[all[i]]);
				BR[bl].push_back(rg[all[i]]);
			}

			for(int bl = 0; bl * BLOCK < all.size(); bl ++)
				sort(BL[bl].begin(), BL[bl].end()),
				sort(BR[bl].begin(), BR[bl].end());
		}
	}

	int get(int l, int r, int k){
		int res = 0;
		if(r - l + 1 < k) return 0;

		for(int i = 0; i < pend.size(); i ++)
			if(isect(lf[pend[i]], rg[pend[i]], l, r) >= k)
				res ++;

		for(int bl = 0; bl * BLOCK < all.size(); bl ++){
			int st = bl * BLOCK, ed = min(st + BLOCK - 1, (int)all.size() - 1);

			if(len[all[st]] >= k){
				res += ed - st + 1;
				res -= BL[bl].end() - upper_bound(BL[bl].begin(), BL[bl].end(), r - k + 1);
				res -= lower_bound(BR[bl].begin(), BR[bl].end(), l + k - 1) - BR[bl].begin();
			}else if(len[all[ed]] >= k){
				for(int i = st; i <= ed; i ++)
					if(isect(lf[all[i]], rg[all[i]], l, r) >= k)
						res ++;					
			}
		}

		return res;
	}
} active, deleted;

int main(){
	cin(n); cin(t);

	for(int tp, l, r, k; n --;){
		cin(tp);
		if(tp == 1){
			cin(l); cin(r);
			l ^= (t * last_ans);
			r ^= (t * last_ans);
			if(l > r) swap(l, r);

			cnt_id ++;
			lf[cnt_id] = l, rg[cnt_id] = r;
			len[cnt_id] = r - l + 1;

			active.add(cnt_id);
		}else if(tp == 2){
			cin(k);

			deleted.add(k);
		}else{
			cin(l); cin(r); cin(k);
			l ^= (t * last_ans);
			r ^= (t * last_ans);
			if(l > r) swap(l, r);

			last_ans = active.get(l, r, k) - deleted.get(l, r, k);
			printf("%d\n", last_ans);
		}
	}

	return 0;
}

Compilation message (stderr)

segments.cpp: In member function 'void dat::add(int)':
segments.cpp:57:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |    for(int bl = 0; bl * BLOCK < all.size(); bl ++)
      |                    ~~~~~~~~~~~^~~~~~~~~~~~
segments.cpp:60:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |    for(int i = 0; i < all.size(); i ++){
      |                   ~~^~~~~~~~~~~~
segments.cpp:66:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |    for(int bl = 0; bl * BLOCK < all.size(); bl ++)
      |                    ~~~~~~~~~~~^~~~~~~~~~~~
segments.cpp: In member function 'int dat::get(int, int, int)':
segments.cpp:76:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |   for(int i = 0; i < pend.size(); i ++)
      |                  ~~^~~~~~~~~~~~~
segments.cpp:80:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |   for(int bl = 0; bl * BLOCK < all.size(); bl ++){
      |                   ~~~~~~~~~~~^~~~~~~~~~~~

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