oj.uz

Submission #111840

# Submission time Handle Problem Language Result Execution time Memory
111840 2019-05-16T11:41:09 Z square1001 New Home (APIO18_new_home) C++14
10 / 100
 5000 ms 290620 KB 
#include <set>
#include <string>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
const int inf = 1012345678;
class segment {
	public:
	int l, r, x;
	segment() : l(0), r(0), x(0) {};
	segment(int l_, int r_, int x_) : l(l_), r(r_), x(x_) {};
	bool operator<(const segment& s) const {
		if(l != s.l) return l < s.l;
		if(r != s.r) return r < s.r;
		return x < s.x;
	}
};
class query {
	public:
	int l, r, x, w;
	query() : l(0), r(0), x(0), w(0) {};
	query(int l_, int r_, int x_, int w_) : l(l_), r(r_), x(x_), w(w_) {};
	bool operator<(const query& q) const {
		return x < q.x;
	}
};
class segtree {
	private:
	int sz;
	vector<int> val;
	public:
	segtree() : sz(0), val(vector<int>()) {};
	segtree(int sz_) {
		sz = 1;
		while(sz < sz_) sz *= 2;
		val = vector<int>(sz * 2, -inf);
	}
	void update(int l, int r, int x) {
		l += sz;
		r += sz;
		while(l != r) {
			if(l & 1) val[l] = max(val[l], x), ++l;
			if(r & 1) --r, val[r] = max(val[r], x);
			l >>= 1, r >>= 1;
		}
	}
	int get(int pos) {
		pos += sz;
		int ans = -inf;
		while(pos >= 1) {
			ans = max(ans, val[pos]);
			pos >>= 1;
		}
		return ans;
	}
};
int main() {
	int N, K, Q;
	cin >> N >> K >> Q;
	vector<int> X(N), T(N), A(N), B(N);
	vector<int> comp = { 0, inf };
	vector<vector<int> > G(K);
	for(int i = 0; i < N; ++i) {
		cin >> X[i] >> T[i] >> A[i] >> B[i]; ++B[i], --T[i];
		comp.push_back(A[i]);
		comp.push_back(B[i]);
		X[i] *= 2;
		G[T[i]].push_back(i);
	}
	vector<int> L(Q), Y(Q);
	for(int i = 0; i < Q; ++i) {
		cin >> L[i] >> Y[i];
		L[i] *= 2;
	}
	sort(comp.begin(), comp.end());
	comp.erase(unique(comp.begin(), comp.end()), comp.end());
	int S = comp.size();
	for(int i = 0; i < N; ++i) {
		A[i] = lower_bound(comp.begin(), comp.end(), A[i]) - comp.begin();
		B[i] = lower_bound(comp.begin(), comp.end(), B[i]) - comp.begin();
	}
	for(int i = 0; i < Q; ++i) {
		Y[i] = lower_bound(comp.begin(), comp.end(), Y[i] + 1) - comp.begin() - 1;
	}
	vector<query> qs;
	for(int i = 0; i < K; ++i) {
		set<segment> st;
		st.insert(segment(0, S, -inf));
		vector<segment> iniqs;
		for(int j : G[i]) {
			iniqs.push_back(segment(A[j], B[j], X[j]));
		}
		sort(iniqs.begin(), iniqs.end(), [](segment s1, segment s2) { return s1.x < s2.x; });
		for(segment s : iniqs) {
			set<segment>::iterator it = st.lower_bound(segment(s.l, s.r, s.x));
			if(it != st.begin()) --it;
			set<segment> nst;
			while(it != st.end() && it->l < s.r) {
				segment t = *it;
				it = st.erase(it);
				int al = max(t.l, s.l), ar = min(t.r, s.r);
				if(al >= ar) continue;
				qs.push_back(query(al, ar, (s.x + t.x) / 2, (s.x - t.x) / 2));
				nst.insert(segment(al, ar, s.x));
				if(t.l < al) nst.insert(segment(t.l, al, t.x));
				if(ar < t.r) nst.insert(segment(ar, t.r, t.x));
			}
			st.insert(nst.begin(), nst.end());
		}
		for(segment s : st) {
			qs.push_back(query(s.l, s.r, (inf + s.x) / 2, (inf - s.x) / 2));
		}
	}
	for(int i = 0; i < Q; ++i) {
		qs.push_back(query(Y[i], Y[i] + 1, L[i], -(i + 1)));
	}
	sort(qs.begin(), qs.end());
	segtree seg(S);
	for(query i : qs) {
		if(i.w >= 0 && i.x - i.w == -inf) {
			seg.update(i.l, i.r, i.x + i.w);
		}
	}
	vector<int> ans(Q, -1);
	for(query i : qs) {
		if(i.w < 0) {
			ans[-i.w - 1] = max(ans[-i.w - 1], seg.get(i.l) - i.x);
		}
		else {
			seg.update(i.l, i.r, i.x + i.w);
		}
	}
	reverse(qs.begin(), qs.end());
	seg = segtree(S);
	for(query i : qs) {
		if(i.w >= 0 && i.x + i.w == inf) {
			seg.update(i.l, i.r, -(i.x - i.w));
		}
	}
	for(query i : qs) {
		if(i.w < 0) {
			ans[-i.w - 1] = max(ans[-i.w - 1], i.x - (-seg.get(i.l)));
		}
		else {
			seg.update(i.l, i.r, -(i.x - i.w));
		}
	}
	for(int i = 0; i < Q; ++i) {
		if(ans[i] > inf / 3) cout << -1 << '\n';
		else cout << ans[i] / 2 << '\n';
	}
	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 3 ms 256 KB Output is correct
3 Correct 3 ms 256 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Incorrect 3 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 3 ms 256 KB Output is correct
3 Correct 3 ms 256 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Incorrect 3 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1069 ms 31324 KB Output is correct
2 Correct 831 ms 29400 KB Output is correct
3 Correct 1416 ms 60424 KB Output is correct
4 Correct 1103 ms 34644 KB Output is correct
5 Correct 1030 ms 32860 KB Output is correct
6 Correct 1043 ms 30080 KB Output is correct
7 Correct 1400 ms 60164 KB Output is correct
8 Correct 1082 ms 34376 KB Output is correct
9 Correct 1048 ms 30160 KB Output is correct
10 Correct 904 ms 29256 KB Output is correct
11 Correct 889 ms 28804 KB Output is correct
12 Correct 775 ms 29028 KB Output is correct

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3550 ms 143924 KB Output is correct
2 Correct 962 ms 49140 KB Output is correct
3 Execution timed out 5090 ms 290620 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 3 ms 256 KB Output is correct
3 Correct 3 ms 256 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Incorrect 3 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 3 ms 256 KB Output is correct
3 Correct 3 ms 256 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Incorrect 3 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -